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JQuery Ajax Maven [A]

JQuery + JQuery Ajax
- JQuery + JQueryAjax 1: JQuery
- JQuery + Ajax 2: JQuery Ajax
Maven

JQuery + JQuery Ajax

JQuery + JQueryAjax 1: JQuery

jQuery is using jQuery($()) wrap DOM into dynamic (factory) nodes
jQuery cannot user DOM object methods, DOM methods cannot use jQuery
JQuery
jQuery var is an array

//conventional JS
$(document).ready(function(){//jquery code})
window.onload=function(){//js code} //appear once
//jquery
$(function(){//jQuery code}); //appear multiple time

difference between jQ: $(document).ready(function(){}); and js: window.οnlοad=function(){}: js only load once, jQ can appear multiple times
use dom var to display jQuery objects
method1: var dom1=jQueryObject[ index]
method2: var dom2=jQueryObject.get();

DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Titletitle>
    <script  src="../js/jquery-1.12.4.min.js">script>
    <script>
        $(document).ready(function(){
            alert('not jquery');
        });
        //jquery
        $(function(){
            alert('jquery...');
            var $btn=$('button');
            alert($btn.length);
            //use dom var to display jQuery objects
            //method1
            var b2= $btn[0];
            alert(b2.firstChild.nodeValue);
            //method2
            var b3=$btn.get(1);
            alert(b3.firstChild.nodeValue)
        })
    script>
head>
<body>
<button>push1button>
<button>push2button>
<button>push3button>
<button>push4button>
<button>push5button>
<button>push6button>
body>
html>

Selector:
1. Basic: Attribute Selector: Element selector: select array

DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Titletitle>
    <script  src="../js/jquery-1.12.4.min.js">script>
    <script>
         $(function(){
//             //attribute selector
//             $('p').css('background-color','red');
//             $('p').css('border','2px solid blue');             $('p').css('background-color','red');
             $('p').css('background-color','red').css('border','2px solid blue');
         });
    script>
    <style>
        h1{
            background-color: #0008ff;
        }
    style>
head>
<body>
<p>Paragraph1p>
<p>Paragraph2p>
<p>Paragraph3p>
<p>Paragraph4p>
<h1>H1h1>
body>
html>

1. Basic Selector: Class Selector : (“.class”) one selector refer to one class, one selector can refer to multiple elements

DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Titletitle>
    <script src="../js/jquery-1.12.4.min.js">script>
    <script>
        $(function(){
            $('.odd1').css('border','1px green dotted');
        });
    script>
    <style>
        .odd2{
            border: 2px blue dotted;
        }
    style>
head>
<body>
<div class="odd1">DIV1div>
<div class="odd2">DIV2div>
<div class="odd1">DIV3div>
<div class="odd2">DIV4div>
<div class="odd1">DIV5div>
<div class="odd2">DIV6div>
<div class="odd7">DIV7div>
body>
html>

(“*”) select all
1. Basic Selector: id Selector (“#id”)

DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title> Titletitle>
    <script  src="../js/jquery-1.12.4.min.js">script>
    <script>
        $(function(){
            var str=$('#id2')[0];
            alert(str.innerHTML);
            $('*').css('border','2px dashed blue');
            alert($('span,p').text());
        });
    script>
head>
<body>
<span>span1span>
<span id="id2">span2span>
<span>span3span>
<span>span4span>
<span>span5span>
<p>paragraphp>
<div>div...div>
body>
html>

1. Hierarchy Selector: (parent child) all child affected

DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Titletitle>
    <script src="../js/jquery-1.12.4.min.js">script>
    <script>
        $(function () {
            $('form p').css('border','1px red  dotted');
            $('form').css('border','2px blue  dotted');
        })
    script>
head>
<body>
    <form>
        <p>Paragraph1p>
        <input type="text" value="BOB">
        <p>Paragraph2p>
        <div>
            <p>paragraph3p>
            <input type="text" value="SAM">
            <p>paragraph4p>
        div>
    form>
    <p>paragraph5p>

body>
html>

1. Hierarchy Selector: (parent > child) one tier below parent affected

DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Titletitle>
    <script src="../js/jquery-1.12.4.min.js">script>
    <script>
        $(function () {
            $('form>p').css('border','1px red  dotted');
            $('form').css('border','2px blue  dotted');
        })
    script>
head>
<body>
    <form>
        <p>Paragraph1p>
        <input type="text" value="BOB">
        <p>Paragraph2p>
        <div>
            <p>paragraph3p>
            <input type="text" value="SAM">
            <p>paragraph4p>
        div>
    form>
    <p>paragraph5p>
body>
html>

1. Hierarchy Selector: (prev + next) prev item and next one item affected, has to match type

DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Titletitle>
    <script src="../js/jquery-1.12.4.min.js">script>
    <script>
        $(function () {
            $('form>p').css('border','1px red  dotted');
            $('form').css('border','2px blue  dotted');
            $('.input+p').css('border','1px green dotted')
        })
    script>
head>
<body>
    <form>
        <p>Paragraph1p>
        <input class="input" type="text" value="BOB">
        <p>Paragraph2p>
        <p>Paragraph3p>
        <div>
            <p>paragraph4p>
            <input class="input" type="text" value="SAM">
            <span>span1span>
            <p>paragraph5p>
            <p>paragraph6p>
        div>
    form>
    <p>paragraph7p>
body>
html>

1. Hierarchy Selector: (prev ~ next) prev item and next all items affected, has to match hierarchy

DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Titletitle>
    <script src="../js/jquery-1.12.4.min.js">script>
    <script>
        $(function () {
            $('form>p').css('border','1px red  dotted');
            $('form').css('border','2px blue  dotted');
            $('.input ~ p').css('border','1px green dotted')
        })
    script>
head>
<body>
    <form>
        <p>Paragraph1p>
        <input class="input" type="text" value="BOB">
        <p>Paragraph2p>
        <p>Paragraph3p>
        <div>
            <p>paragraph4p>
            <input class="input" type="text" value="SAM">
            <span>span1span>
            <p>paragraph5p>
            <p>paragraph6p>
        div>
    form>
    <p>paragraph7p>
body>
html>

1. Hierarchy Selector: $(‘type’).siblings(‘type’).script(‘content’) …affect all siblings

DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Titletitle>
    <script src="../js/jquery-1.12.4.min.js">script>
    <script>
        $(function () {
            $('form>p').css('border','1px red  dotted');
            $('form').css('border','2px blue  dotted');
            $('.input').siblings('p').css('border','2px green  dotted');
        })
    script>
head>
<body>
    <form>
        <p>Paragraph1p>
        <input class="input" type="text" value="BOB">
        <p>Paragraph2p>
        <p>Paragraph3p>
        <div>
            <p>paragraph4p>
            <input class="input2" type="text" value="SAM">
            <span>span1span>
            <p>paragraph5p>
            <p>paragraph6p>
        div>
    form>
    <p>paragraph7p>
body>
html>

1. Hierarchy Selector: $(^{'} t y p e^{'}) . n e x t A l l (^{'} t y p e^{'}) . s c r i p t (^{'} c o n t e n t^{'}),$ (‘type’).prevAll(‘type’).script(‘content’) …affect all of same hierarchy

DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Titletitle>
    <script src="../js/jquery-1.12.4.min.js">script>
    <script>
        $(function () {
            $('#input').nextAll('p').css('backgroundColor','#e3e3e3');
            $('#input').prevAll('p').css('backgroundColor','#ffda00');
        })
    script>
head>
<body>
    <form>
        <p>Paragraph1p>
        <input class="input" type="text" value="BOB">
        <p>Paragraph2p>
        <p>Paragraph3p>
        <div>
            <p>paragraph4p>
            <span>span0span>
            <p>paragraph4p>
            <input id="input" type="text" value="SAM">
            <span>span1span>
            <p>paragraph5p>
            <span>span2span>
            <p>paragraph6p>
        div>
    form>
    <p>paragraph7p>
body>
html>

1. Filter Selelctor:

DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Titletitle>
    <script src="../js/jquery-1.12.4.min.js">script>
    <script>
    $(function(){
        $('li:first').css('border','1px dotted blue');
        $('li:even').css('border','1px dotted red');
        $('li:last').css('border','1px dotted green');
        $('li:eq(3)').css('border','1px dotted blue');
        $('li:not(.c1)').css('border','1px dotted yellow');
        $("li:contains('2')").css('background-color','blue');
        $('.b1').click(function(){
            alert($('input:hidden').val());
        })
        $('.b2').click(function(){
            alert($('form input:visible').val());
            $('input:visible:eq(0)').css('border','2px dotted red');
            $('form input:visible:eq(0)').css('border','2px dotted blue');
            $('input:visible').each(function(){
               alert($(this).val());
            });
        });
//        for(var i=0; i<3;i++){
//            alert($('input:visible:eq(i)').val());
//        }
    });
    script>
head>
<body>
<button class="b1">PUSH1button>
<button class="b2">PUSH2button>
<input  type="text" value="visible0">
<form action="#">
    <input type="hidden" value="hidden!!!!">
    <input  type="text" value="visible1">
    <input  type="text" value="visible2">
form>
<input  type="text" value="visible3">
<ul>
    <li class="c1">li1li>
    <li class="c1">li2li>
    <li class="c1">li3li>
    <li class="c1">li4li>
    <li class="c1">li5li>
    <li >li6li>
    <li class="c1">li7li>
    <li class="c1">li8li>
ul>
<p>p1p>
body>
html>

1. Filter Selelctor: nth-child(even/odd/2/3n/3n+1)

DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Titletitle>
    <script src="../js/jquery-1.12.4.min.js">script>
    <script>
    $(function(){
        $('button').click(function(){
            $('ul :first-child').css('border','1px red dotted');
            $('ul :last-child').css('border','1px blue dotted');
            $('ul :nth-child(3n)').css('border','1px green dotted');
        });
    });
    script>
head>
<body>
<p style="...">p1p>
<button >PUSH1button>
<button >PUSH2button>
<button >PUSH3button>
<ul>
    <li>Johnli>
    <li>Karlli>
    <li>Brandonli>
    <li>Bradli>
    <li>Joli>
ul>
<ul>
    <li>Glenli>
    <li>Taneli>
    <li>Ralphli>
    <li>Ronli>
    <li>Tomli>
ul>
body>
html>

1. Filter Selelctor: nth-child(even/odd/2/3n/3n+1)

DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Titletitle>
    <script src="../js/jquery-1.12.4.min.js">script>
    <script>
        $(function () {
            $('button').click(function () {
                $('tr:not(:first-child) td:nth-child(4n)').css('background-color','#c1c1c1')
            });
        });
    script>
head>
<body>
<p style="...">p1p>
<button>PUSH1button>
<button>PUSH2button>
<button>PUSH3button>
<table border="1" cellpadding="5">
    <tr>
        <td>idtd>
        <td>usernametd>
        <td>salarytd>
        <td>deletetd>
    tr>
    <tr>
        <td>idtd>
        <td>username1td>
        <td>salarytd>
        <td><a href="#">deletea>td>
    tr>
    <tr>
        <td>idtd>
        <td>username2td>
        <td>salarytd>
        <td><a href="#">deletea>td>
    tr>
table>
body>
html>

1. Filter Selector: form(input, text, password, radio, checkbox, submit, image, reset, button, file, hidden)

DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Titletitle>
    <script src="../js/jquery-1.12.4.min.js">script>
    <script>
        $(function () {
            $('button').click(function () {
                $('form input').each(function(){
                    alert($(this).val());
                });
                $('form :text').each(function(){
                    alert($(this).val());
                });
                $('form :text:disabled').each(function(){
                    alert($(this).val());
                });
                alert($(' select :selected').html());
                $('tr:odd').css('background-color', '#c1c1c1');
            });
        });
    script>
head>
<body>
<p style="...">p1p>
<button>PUSH1button>
<button>PUSH2button>
<button>PUSH3button>
<form action="#">
    <input type="text" disabled="disabled" value="111">
    <input type="text" value="222">
    <input type="text" value="333">
    <select>
        <option>1option>
        <option selected="selected">2option>
        <option>3option>
    select>
form>
<input type="text" value="444">

<table border="1" cellpadding="5">
    <tr>
        <td>idtd>
        <td>usernametd>
        <td>salarytd>
        <td>deletetd>
    tr>
    <tr>
        <td>idtd>
        <td>username1td>
        <td>salarytd>
        <td><a href="#">deletea>td>
    tr>
    <tr>
        <td>idtd>
        <td>username2td>
        <td>salarytd>
        <td><a href="#">deletea>td>
    tr>
table>
body>
html>

jQuery DOM : 1. $().val() :value
$().attr(‘attributeName’) : attribute
change attribute: $(‘name’).attr(‘value’,‘name’);

DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Titletitle>
    <script src="../js/jquery-1.12.4.min.js">script>
    <script>
        $(function(){
        $('button').click(function(){
            alert($(':text').attr('name'));
            $(':text').attr('value','Jerry');
        });
        });
    script>
head>
<body>
    <input type="text" value="Tom" name="username">
<br>
<button>pushbutton>
body>
html>

jQuery DOM :append: $ ( ‘ul’).append($content);, appendTo: $content.appendTo(‘ul’);
jQuery DOM :prepend: $ ( ‘ul’).prepend($content);, appendTo: $content.prependTo(‘ul’);

DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Titletitle>
    <script src="../js/jquery-1.12.4.min.js">script>
    <script>
        $(function () {
            $('button').click(function () {
                var $content = $('new
');
                $('ul').append($content);
                $content.appendTo('ul');
                $('ul').prepend($content);
                $content.prependTo('ul');
                //                $('ul li:last-child').text('13');
            });
        });
    script>
head>
<body>
<button>push to appendbutton>
<ul>
    <li>l1li>
    <li>l2li>
    <li>l3li>
ul>
<ul>
    <li>l1li>
    <li>l2li>
    <li>l3li>
ul>
body>
html>

jQuery DOM : after, before, insertAfter: $content.insertAfter(‘ul’);insertBefore: $content.insertAfter(‘ul’);;

DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Titletitle>
    <script src="../js/jquery-1.12.4.min.js">script>
    <script>
        $(function(){
            $('button').click(function(){
                var $str=$('name1age1sex1');
                $str.insertAfter('#flag');
            });
        });
    script>
head>
<body>
<table border="1" cellpadding="10">
    <tr>
        <td>usernametd>
        <td>agetd>
        <td>sextd>
    tr>
    <tr id="flag">
        <td>usernametd>
        <td>agetd>
        <td>sextd>
    tr>
table>
<form action="#">
    username: <input type="text" name="username"><br>
    age: <input type="text" name="age"><br>
    sex: <input type="text" name="gender"><br>
form>
<button>add attributebutton>
body>
html>

jQuery DOM: remove, empty

DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Titletitle>
    <script src="../js/jquery-1.12.4.min.js">script>
    <script>
        $(function(){
            $('button').click(function(){
                $(":text").remove();
                $("p").empty();
            });
        });
    script>
    <style>
        p{background-color: #ffda00;
        width: 100px;
        height: 20px;}
    style>
head>
<body>
 <input type="text" value="Tom" name="username">
<p >p1p>
<br>
<button>pushbutton>
body>
html>

jQuery Dom: width(), height();

DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Titletitle>
    <script src="../js/jquery-1.12.4.min.js">script>
    <script>
        $(function () {
            $('div').click(function () {
                alert($(this).css('background-color', '#c1c1c1').height('30px').height());
                alert($(this).width());
                alert($(this).text());
                alert($(this).html());
                alert($(this).html('changed!'));
            });
        });
    script>
head>
<body>
<button>buttonbutton>
<div>
    <span>span1span>
    <span>span2span>
div>
<div>div2div>
<div>div3div>
<div>div4div>
<div>div5div>
<div>div6div>
body>
html>

jQuery Dom: add/remove class, toggle

DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Titletitle>
    <script src="../js/jquery-1.12.4.min.js">script>
    <script>
        $(function () {
            $('button:eq(0)').click(function () {
                $('p:eq(1)').addClass('p1');
            });
            $('button:eq(1)').click(function () {
                $('p:eq(1)').removeClass('p1');
            });
            $('button:eq(2)').click(function(){
               $('p:eq(1)').toggleClass('p1');
            });
        });
    script>
    <style>
        .p1{background-color: #c1c1c1;}
    style>
head>
<body>
<button>push add classbutton>
<button>push remove classbutton>
<button>push toggle classbutton>
<p class="p1"> p1p>
<p> p2p>
<p class="p1"> p3p>
<p> p4p>
body>
html>

DOM: bind / unbind

DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Titletitle>
    <script src="../js/jquery-1.12.4.min.js">script>
    <script>
        $(function(){
            $('button:eq(0)').click(function(){
                var flag=$('p').is(':hidden');
                if(flag){
                    $('p').show();
                }else{
                    $('p').hide();
                }
            });
            $('button:eq(1)').bind('click',function(){
                var flag=$('p').is(':hidden');
                if(flag){
                    $('p').show();
                }else{
                    $('p').hide();
                }
            });
        });
    script>
head>
<body>
<button>hide/showbutton>
<button>bind hide/showbutton>
<p>p1 testp>
body>
html>

DOM: hover

DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Titletitle>
    <script src="../js/jquery-1.12.4.min.js">script>
    <script>
        $(function () {
            $('div').hover(
                function () {
                    $('p').addClass('p1');
                },
                function () {
                    $('p').removeClass('p1');
                });
            $('td').hover(
                function () {
                    $(this).addClass('p1');
                },
                function () {
                    $(this).removeClass('p1');
                });
        });
    script>

    <style>
        .p1 {
            background-color: #c1c1c1
        }
    style>
head>
<body>
<div>hoverdiv>
<hr>
<p>p1...p>
<table border="1">
    <tr>
        <td>td1td>
        <td>td2td>
    tr>
    <tr>
        <td>td1td>
        <td>td2td>
    tr>
table>
body>
html>

dom: bubble

DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Titletitle>
    <script src="../js/jquery-1.12.4.min.js">script>
    <script>
        $(function(){
            $('body').click(function(){
                alert($(this).html());
                return false;
            });
            $('div').click(function(){
                alert($(this).html());
            });
            $('span').click(function(){
                alert($(this).html());
            });
        });
    script>
head>
<body>
<div><span>SPAN1span>div>
<hr>
<div><span>SPAN2span>div>
body>
html>

Dom: event

DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Titletitle>
    <script src="../js/jquery-1.12.4.min.js">script>
<script>
    $(function(){
        $('body').height('300px').mousemove(
            function(event){
               $('div').text("x:"+event.pageX+ "y:"+event.pageY);
            });
    });
script>
head>
<body>
<div>div>
body>
html>

JQuery + Ajax 2: JQuery Ajax

Ajax: Asynchronous JavaScript & XML
When a page loads again, only new information is added , does not have to renew all: save time
get post review
JQuery encapsulation of Ajax ($.ajax()) (load(), $.get(), $.post(), $.getScript(), $.getJSON()
3 ways to send info: XML, HTML, JSON
domObject.load( url, data)
url: String: server location; data: Object sent key/value to server; callback: function sent msg after request done, successful or not
$.get(url, args, function(result){},“JSON”);
$.post(url, args, function(result){},“JSON”);
$.getJSON(url, args, function(result){});
html.txt

<a href="http://www.bing.com">binga>
<a href="http://www.baidu.com">baidua>

jquery_ajax.html

DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Titletitle>
    <script src="../js/jquery-1.12.4.min.js">script>
    <script>
$(function(){
    $('button').click(function(){
        var url="txt/html.txt";
        var data={"time":new Date()};
        $('div').load(url,data);
    });
});
    script>
head>
<body>
<button>get HTMLbutton>
<div>div1div>
body>
html>

$.get(url, args，function（result）{ //return}, “JSON”)
$.getJSON(url, args，function（result）{ //return})
$.post(url, args，function（result）{ //return}, “JSON”)
url: server address
args: key/value sent to server
function: other attributes
result: server returned result
“JSON”: if selected, returned object encapsulated as JSON objects
ajax.json

{
  "address":{
    "province":"AAA",
    "city": "BBB",
    "area": "CCC"
  },
  "name":"BOB",
  "age":"34"
}

jquery_ajax2.html

DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Titletitle>
    <script src="../js/jquery-1.12.4.min.js">script>
    <script>
        $(function () {
            $('button').click(function () {
                var url = "txt/ajax.json";
                var data = {"time": new Date()};
//                $('div').load(url,data);
                $.get(url, data, function(result) {
                    $('#div1').text(result.name);
                    $('#div2').text(result.age);
                   $('#div3').text(result.address.city);
                },"JSON");
            });
        })
    script>
head>
<body>
<button>get JSON databutton>
<div id="div1">div1div>
<div id="div2">div1div>
<div id="div3">div1div>
body>
html>

use .txt
ajax.txt

{
  "address":{
    "province":"AAA",
    "city": "BBB",
    "area": "CCC"
  },
  "name":"BOB",
  "age":"34"
}

option 1

DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Titletitle>
    <script src="../js/jquery-1.12.4.min.js">script>
    <script>
        $(function () {
            $('button').click(function () {
                var url = "txt/ajax.txt";
                var data = {"time": new Date()};
//                $('div').load(url,data);
                $.get(url, data, function(data) {
                    var result = eval("("+data+")");
                    $('#div1').text(result.name);
                    $('#div2').text(result.age);
                   $('#div3').text(result.address.city);
                });
            });
        })
    script>
head>
<body>
<button>get JSON databutton>
<div id="div1">div1div>
<div id="div2">div1div>
<div id="div3">div1div>
body>
html>

option2

DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Titletitle>
    <script src="../js/jquery-1.12.4.min.js">script>
    <script>
        $(function () {
            $('button').click(function () {
                var url = "txt/ajax.txt";
                var data = {"time": new Date()};
//                $('div').load(url,data);
                $.getJSON(url, data, function(result) {
                    $('#div1').text(result.name);
                    $('#div2').text(result.age);
                   $('#div3').text(result.address.city);
                });
            });
        })
    script>
head>
<body>
<button>get JSON databutton>
<div id="div1">div1div>
<div id="div2">div1div>
<div id="div3">div1div>
body>
html>

XMLHttpRequest methods: abort(); getAllResponseHeaders(); getResponseHeader(“header”); setRequestHeader(“header”, “value”)
XMLHttpRequest methods: open(“method”, “url”);
XMLHttpRequest methods: send(content);
XMLHttpRequest attributes: onreadystatechange; readyState; responseText; responseXML; status(404); statusText
Parse TEXT

DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Titletitle>
    <script src="../js/jquery-1.12.4.min.js">script>
    <script>
        $(function () {
            //parse
            $('button').click(function () {
                //1. create XMLHTTPRequest obj
                var xmlHttp = new XMLHttpRequest();
                //2. use open to get connection to server
                var method = 'get';
                var url = 'txt/ajax.txt';
                xmlHttp.open(method, url);
                //3. use send method to send request to server
                xmlHttp.send();
                //4. use onreadystatechange to get state
                xmlHttp.onreadystatechange = function () {
                    //when readystate=4 status=200
                    if (xmlHttp.readyState == 4 && xmlHttp.status == 200) {
                            var str = xmlHttp.responseText;
                            $('div').text(str);
//                        document.getElementsByTagName('p')[0].innerHTML =
//                            xmlHttp.responseText;
                    }
                }
            });
        })
    script>
head>
<body>
<button>clickbutton>
<p>p>
<div>div>
body>
html>

parse XML eval()
Ajax.xml


<student>
    <name id="xName">BOBname>
    <age id="xAge">35age>
    <address id="xAddr">SHaddress>
student>

ajax2.html

DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Titletitle>
    <script src="../js/jquery-1.12.4.min.js">script>
    <script>
        $(function () {
            //parse
            $('button').click(function () {
                //1. create XMLHTTPRequest obj
                var xmlHttp = new XMLHttpRequest();
                //2. use open to get connection to server
                var method = 'get';
                var url = 'txt/ajax.xml';
                xmlHttp.open(method, url);
                //3. use send method to send request to server
                xmlHttp.send();
                //4. use onreadystatechange to get state
                xmlHttp.onreadystatechange = function () {
                    //when readystate=4 status=200
                    if (xmlHttp.readyState == 4 && xmlHttp.status == 200) {
                        var xml=xmlHttp.responseXML;
                        var name=xml.getElementById('xName');
                        var age=xml.getElementById('xAge');
                        var addr=xml.getElementById('xAddr');
                        $("#div1").text(name.innerHTML);
                        $("#div2").text(age.innerHTML);
                        $("#div3").text(addr.innerHTML);
                    }
                }
            });
        })
    script>
head>
<body>
<button>clickbutton>
<p>p>
<div id="div1">div>
<div id="div2">div>
<div id="div3">div>
body>
html>

MOVIE EXAMPLE
jackson-annotation download
jackson-core download
jackson-databind download
junit-4.9.jardownload
MySQL

CREATE TABLE `movies` (
  `id` int NOT NULL,
  `title` varchar(255) DEFAULT NULL,
  `director` varchar(255) DEFAULT NULL,
  `actor` varchar(255) DEFAULT NULL,
  `time` datetime DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

MovieDao.java

package com.abc.ajax.dao;
import java.sql.Connection;
import java.util.List;
import com.abc.ajax.po.Movie;
import com.abc.ajax.util.JDBCUtil;
public class MovieDao {
public List<Movie> queryList(String movieName){
	Connection connection=JDBCUtil.getConnection();
	String sql="select * from movies where title like ?";
	List<Movie> list=null;
	try {
		list = JDBCUtil.queryT(connection,sql, "%"+movieName+"%");
		System.out.println(sql+"%"+movieName+"%");
		System.out.println(list);
		return list;
	} catch (Exception e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	}finally{
		JDBCUtil.close(connection);
	}
	return null;
}
}

Movie.java

package com.abc.ajax.po;
import java.util.Date;
public class Movie {
	private int id;
	private String title;
	private String director;
	private String actor;
	private Date time;
	public Movie(int id, String title, String director, String actor, Date time) {
		super();
		this.id = id;
		this.title = title;
		this.director = director;
		this.actor = actor;
		this.time = time;
	}

	public int getId() {
		return id;
	}

	public void setId(int id) {
		this.id = id;
	}

	public String getTitle() {
		return title;
	}

	public void setTitle(String title) {
		this.title = title;
	}

	public String getDirector() {
		return director;
	}

	public void setDirector(String director) {
		this.director = director;
	}

	public String getActor() {
		return actor;
	}

	public void setActor(String actor) {
		this.actor = actor;
	}

	public Date getTime() {
		return time;
	}

	public void setTime(Date time) {
		this.time = time;
	}

	@Override
	public String toString() {
		return "Movie [id=" + id + ", title=" + title + ", director=" + director + ", actor=" + actor + ", time=" + time
				+ "]";
	}
}

ListServlet.java

package com.abc.ajax.servlet;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.abc.ajax.dao.MovieDao;
import com.abc.ajax.po.Movie;
import com.fasterxml.jackson.databind.ObjectMapper;
public class ListServlet extends HttpServlet {
	@Override
	protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
		System.out.println("ListServlet.service");
		String value = req.getParameter("movieName");
		System.out.println(value);
//		List list = new ArrayList();
//		list.add(new Movie(1, "American Con", "null", "null", new Date()));
//		list.add(new Movie(2, "American Con", "null", "null", new Date()));
		MovieDao dao=new MovieDao();
		List<Movie> list=dao.queryList(value);
		if(list!=null){
			ObjectMapper mapper = new ObjectMapper();
			String valueAsStr = mapper.writeValueAsString(list);
			resp.setCharacterEncoding("utf-8");
			resp.getWriter().write(valueAsStr);
		}
	}
}

JDBCUtil.java

package com.abc.ajax.util;
import java.io.IOException;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Properties;
import com.abc.ajax.po.Movie;
import com.mchange.v2.c3p0.ComboPooledDataSource;
public class JDBCUtil {
	private static ComboPooledDataSource ds = null;
	// get properties from c3p0
	static {
		ds = new ComboPooledDataSource("jdbc_c3p0");
	}
	// get connection
	public static Connection getConnection() {
		try {
			System.out.println("connection: "+ds.getConnection());
			return ds.getConnection();
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return null;
	}
	// close connection
	public static void close(Connection conn) {
		try {
			if (conn != null) {
				conn.close();
			}
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
	// perform sql
	public static List<Movie> queryT(Connection conn, String sql, String RegEx) {
		PreparedStatement ps = null;
		ResultSet rs = null;
		List<Movie> list = new ArrayList<Movie>();
		try {
			ps = conn.prepareStatement(sql);
			ps.setString(1, RegEx);
			rs = ps.executeQuery();
			while (rs.next()) {
				// 1, "American Con", "null", "null", new Date())
				int id = rs.getInt("id");
				String title = rs.getString("title");
				String director = rs.getString("director");
				String actor= rs.getString("actor");
				Date time= rs.getDate("time");
				System.out.println(id+" "+director+" "+actor+" "+time);
				list.add(new Movie(id, title, director, actor,time));				
			}
			rs.close();
			ps.close();
			return list;
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return null;

	}
}

c3p0-config.xml


<c3p0-config>
	
	<default-config>
		<property name="initialPoolSize">10property>
		<property name="maxPoolSize">100property>
		<property name="minPoolSize">10property>
		<property name="driverClass">com.mysql.cj.jdbc.Driverproperty>
		<property name="jdbcUrl">jdbc:mysql://localhost:3306/movies?serverTimezone=UTCproperty>
		<property name="user">rootproperty>
		<property name="password">12345property>
	default-config>
	
	<named-config name="jdbc-c3p0">
		<property name="initialPoolSize">10property>
		<property name="maxPoolSize">100property>
		<property name="minPoolSize">10property>
		<property name="driverClass">com.mysql.cj.jdbc.Driverproperty>
		<property name="jdbcUrl">jdbc:mysql://localhost:3306/movies?serverTimezone=UTCproperty>
		<property name="user">rootproperty>
		<property name="password">12345property>
	named-config>
c3p0-config>

web.xml


<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns="http://xmlns.jcp.org/xml/ns/javaee"
	xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
	id="WebApp_ID" version="3.1">
	<display-name>webappjq2display-name>
	<servlet>
		<servlet-name>ListServletservlet-name>
		<servlet-class>com.abc.ajax.servlet.ListServletservlet-class>
	servlet>
	<servlet-mapping>
		<servlet-name>ListServletservlet-name>
		<url-pattern>/list.actionurl-pattern>
	servlet-mapping>
web-app>

search.html

DOCTYPE html>
<html>
<head>
<title>search.htmltitle>
<meta name="keywords" content="keyword1,keyword2,keyword3">
<meta name="description" content="this is my page">
<meta name="content-type" content="text/html; charset=UTF-8">
<script type="text/javascript" src="js/jquery-1.12.4.min.js">script>
<script type="text/javascript">
	$(function() {
		$('#movieInput').focus(function() {
			//getJSON get data
			var url = "list.action";
			var args = {
				"movieName" : $('#movieInput').val()
			};
			$.getJSON(url, args, function(result) {
				//delete previous option data
				$('option').remove();
				//result get List result
				for (var i = 0; i < result.length; i++) {
					//1. create 
					var $option = $(');
					//2. set $option value
					$option.attr("value", result[i].title);
					//3. add to datalist
					$('datalist').append($option);
				}
			});
		});
	})
script>
head>
<body>
	<input list="movieSearch" id="movieInput" name="movieName">
	<datalist id="movieSearch">
	datalist>
body>
html>

AREA EXAMPLE: UNSUCCESSFUL: jstl core did not work therefore couldn’t use lists to properly display using JQ
only lists tables from sql…? did not find why
SQL

CREATE TABLE `city` (
  `id` int NOT NULL,
  `city_name` varchar(255) DEFAULT NULL,
  `state_id` int DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

CREATE TABLE `country` (
  `ID` int NOT NULL,
  `Country_Name` varchar(255) DEFAULT NULL,
  PRIMARY KEY (`ID`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

CREATE TABLE `state` (
  `id` int NOT NULL,
  `state_name` varchar(255) DEFAULT NULL,
  `country_id` int DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

java: webappjq3
ListDao.java

package com.abc.ajax.po;
public class city {
private int id;
private String cityName;
private int stateId;
public city(int id, String cityName, int stateId) {
	super();
	this.id = id;
	this.cityName = cityName;
	this.stateId = stateId;
}
public int getId() {
	return id;
}
public void setId(int id) {
	this.id = id;
}
public String getCityName() {
	return cityName;
}
public void setCityName(String cityName) {
	this.cityName = cityName;
}
public int getStateId() {
	return stateId;
}
public void setStateId(int stateId) {
	this.stateId = stateId;
}
@Override
public String toString() {
	return "city [id=" + id + ", cityName=" + cityName + ", stateId=" + stateId + "]";
}
}

city.java

package com.abc.ajax.po;
public class city {
private int id;
private String cityName;
private int stateId;
public city(int id, String cityName, int stateId) {
	super();
	this.id = id;
	this.cityName = cityName;
	this.stateId = stateId;
}
public int getId() {
	return id;
}
public void setId(int id) {
	this.id = id;
}
public String getCityName() {
	return cityName;
}
public void setCityName(String cityName) {
	this.cityName = cityName;
}
public int getStateId() {
	return stateId;
}
public void setStateId(int stateId) {
	this.stateId = stateId;
}
@Override
public String toString() {
	return "city [id=" + id + ", cityName=" + cityName + ", stateId=" + stateId + "]";
}
}

country.java

package com.abc.ajax.po;
public class country {
private int id;
private String countryName;
public country(int id, String countryName) {
	super();
	this.id = id;
	this.countryName = countryName;
}
public int getId() {
	return id;
}
public void setId(int id) {
	this.id = id;
}
public String getCountryName() {
	return countryName;
}
public void setCountryName(String countryName) {
	this.countryName = countryName;
}
@Override
public String toString() {
	return "country [id=" + id + ", countryName=" + countryName + "]";
}

}

state.java

package com.abc.ajax.po;
public class state {
	private int id;
	private String stateName;
	private int countryId;
	public state(int id, String stateName, int countryId) {
		super();
		this.countryId=countryId;
		this.id = id;
		this.stateName = stateName;
	}
	public int getId() {
		return id;
	}
	public void setId(int id) {
		this.id = id;
	}
	public String getStateName() {
		return stateName;
	}
	public void setStateName(String stateName) {
		this.stateName = stateName;
	}
	public int getCountryId() {
		return countryId;
	}
	public void setCountryId(int countryId) {
		this.countryId = countryId;
	}
	@Override
	public String toString() {
		return "state [id=" + id + ", stateName=" + stateName + ", countryId=" + countryId + "]";
	}
}

ListServlet.java

package com.abc.ajax.servlet;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.abc.ajax.dao.ListDao;
import com.abc.ajax.po.city;
import com.abc.ajax.po.country;
import com.abc.ajax.po.state;
public class ListServlet extends HttpServlet {
	ListDao dao = new ListDao();
	protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
		resp.setCharacterEncoding("utf-8");
		String method = req.getParameter("method");
		if (method.equals("cList")) {
			System.out.println("listServlet" + method);
			List<state> listS = queryS();
			List<country> listCo = queryCo();
			List<city> listC = queryC();
			if (listCo != null ) {
				System.out.println(listCo.toString());
				System.out.println(listS.toString());
				System.out.println(listC.toString());
				req.setAttribute("countryList", listCo);
				req.setAttribute("stateList", listCo);
				req.setAttribute("cityList", listC);
				req.getRequestDispatcher("list.jsp").forward(req, resp);
			}
		}
	}
	private List<country> queryCo() {
		List<country> list = dao.queryCountry();
		System.out.println(" dao.queryCountry");
		return list;
	}
	private List<state> queryS() {
		List<state> list = dao.queryState();
		System.out.println("dao.queryState");
		return list;
	}
	private List<city> queryC() {
		List<city> list = dao.queryCity();
		System.out.println("dao.queryCity");
		return list;
	}
}

JDBCUtil.java

package com.abc.ajax.util;
import java.io.IOException;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Properties;
import com.abc.ajax.po.city;
import com.abc.ajax.po.country;
import com.abc.ajax.po.state;
import com.mchange.v2.c3p0.ComboPooledDataSource;
public class JDBCUtil {
	private static ComboPooledDataSource ds = null;
	// get properties from c3p0
	static {
		ds = new ComboPooledDataSource("jdbc_c3p0");
	}
	// get connection
	public static Connection getConnection() {
		try {
			System.out.println("connection: " + ds.getConnection());
			return ds.getConnection();
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return null;
	}
	// close connection
	public static void close(Connection conn) {
		try {
			if (conn != null) {
				conn.close();
			}
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
	// perform sql
	public static List<country> queryCountry(Connection conn, String sql, String RegEx) {
		PreparedStatement ps = null;
		ResultSet rs = null;
		List<country> list = new ArrayList<country>();
		try {
			ps = conn.prepareStatement(sql);
			rs = ps.executeQuery();
			System.out.println("JDBCUTIL" + sql);
			while (rs.next()) {
				int id = rs.getInt("id");
				String countryName = rs.getString("countryName");
				System.out.println(id + " " + countryName);
				list.add(new country(id, countryName));
			}
			rs.close();
			ps.close();
			return list;
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return null;
	}
	// state
	public static List<state> queryState(Connection conn, String sql, int Cid) {
		PreparedStatement ps = null;
		ResultSet rs = null;
		List<state> list = new ArrayList<state>();
		try {
			ps = conn.prepareStatement(sql);
			if (Cid >0) {
				ps.setInt(1, Cid);
			}
			rs = ps.executeQuery();
			System.out.println("JDBCUTIL" + sql);

			while (rs.next()) {
				int id = rs.getInt("id");
				String stateName = rs.getString("stateName");
				int countryId = rs.getInt("countryId");
				System.out.println(id + " " + stateName + " " + countryId);
				list.add(new state(id, stateName, countryId));
			}
			rs.close();
			ps.close();
			return list;
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return null;
	}
	// city
	public static List<city> queryCity(Connection conn, String sql, int Sid) {
		PreparedStatement ps = null;
		ResultSet rs = null;
		System.out.println("JDBCUTIL" + sql);

		List<city> list = new ArrayList<city>();
		try {
			ps = conn.prepareStatement(sql);
			if (Sid >0) {
				ps.setInt(1, Sid);
			}
			rs = ps.executeQuery();
			while (rs.next()) {
				int id = rs.getInt("id");
				String cityName = rs.getString("cityName");
				int stateId = rs.getInt("stateId");
				System.out.println(id + " " + cityName + " " + stateId);
				list.add(new city(id, cityName, stateId));
			}
			rs.close();
			ps.close();
			return list;
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return null;
	}
}

c3p0-config.xml


<c3p0-config>
	
	<default-config>
		<property name="initialPoolSize">10property>
		<property name="maxPoolSize">100property>
		<property name="minPoolSize">10property>
		<property name="driverClass">com.mysql.cj.jdbc.Driverproperty>
		<property name="jdbcUrl">jdbc:mysql://localhost:3306/area?serverTimezone=UTCproperty>
		<property name="user">rootproperty>
		<property name="password">12345property>
	default-config>
	
	<named-config name="jdbc-c3p0">
		<property name="initialPoolSize">10property>
		<property name="maxPoolSize">100property>
		<property name="minPoolSize">10property>
		<property name="driverClass">com.mysql.cj.jdbc.Driverproperty>
		<property name="jdbcUrl">jdbc:mysql://localhost:3306/area?serverTimezone=UTCproperty>
		<property name="user">rootproperty>
		<property name="password">12345property>
	named-config>
c3p0-config>

web.xml


DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd">
<web-app>
	<display-name>webappjq3display-name>
	<description>areaListdescription>
	<servlet>
		<servlet-name>ListServletservlet-name>
		<servlet-class>com.abc.ajax.servlet.ListServletservlet-class>
	servlet>
	<servlet-mapping>
		<servlet-name>ListServletservlet-name>
		<url-pattern>*.actionurl-pattern>
	servlet-mapping>
web-app>

index.jsp

<%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">    
    <title>My JSP 'index.jsp' starting pagetitle>
	<meta http-equiv="pragma" content="no-cache">
	<meta http-equiv="cache-control" content="no-cache">
	<meta http-equiv="expires" content="0">    
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
	<meta http-equiv="description" content="This is my page">
	
  head>
  <body>
    This is my JSP page. <br>
    <% response.sendRedirect("listServlet.action?method=cList");
    %>
  body>
html>

list.jsp

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<%@ page import="com.abc.ajax.po.country"%>
<%@ page import="com.abc.ajax.po.state"%>
<%@ page import="com.abc.ajax.po.city"%>
DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>My JSP 'List.jsp' starting pagetitle>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">

head>
<body>
	<%
		List<country> coList = (List<country>) request.getAttribute("countryList");
		List<state> sList = (List<state>) request.getAttribute("stateList");
		List<city> cList = (List<city>) request.getAttribute("cityList");
		out.println(coList.toString());
		out.println(sList.toString());
		out.println(cList.toString());
	%>
	<select id="co">
		<option selected="selected">COUNTRYoption>
				<option value="">option>
					select>   
	<select id="st">
		<option selected="selected">STATEoption>
				<option value="">option>
	select>   
	<select id="ci">
			<option selected="selected">CITYoption>
		<option value="">option>
	select>
	<br>
body>
html>

SOLVE SQL & Navicat 2003 - can’t connect to mysql server on localhost(10061)
services.msc
connect with cmd as admin

D:\Program Files\mysql\bin>mysql -u root -p
Enter password: *****
Welcome to the MySQL monitor.  Commands end with ; or \g.

SOLVE Several ports (8005, 8080, 8009) required by Tomcat v7.0 Server at localhost are already in use

d:\>netstat -ano|findstr 4012
  UDP    127.0.0.1:1900         *:*                                    4012
d:\>taskkill /pid 4012 /f

Maven

organize Jars, project management, comprehension tool (Project Object Model) POM
maven
environment variables: system: add: name: MAVEN_HOME value: D:\Program Files\apache-maven-3.6.3
environment variables: system: add to path: ;%MAVEN_HOME%\bin;
other environment variables

C:\Users\Administrator>mvn -v
Apache Maven 3.6.3 (cecedd343002696d0abb50b32b541b8a6ba2883f)
Maven home: D:\Program Files\apache-maven-3.6.3\bin\..
Java version: 1.8.0_112, vendor: Oracle Corporation, runtime: C:\Program Files\Java\jdk1.8
.0_112\jre
Default locale: zh_CN, platform encoding: GBK
OS name: "windows 8", version: "6.2", arch: "amd64", family: "windows"
D:\Program Files\mysql\bin>java -version
java version "9"
Java(TM) SE Runtime Environment (build 9+181)
Java HotSpot(TM) 64-Bit Server VM (build 9+181, mixed mode)

bin: executables ; boot: framework; conf: included packages; lib: java files
mvn help: system : print all system environment variable
project structure
POM location
cmd: shift right mouse click: open cmd from this location

  <repositories>
    <repository>
      <id>central</id>
      <name>Central Repository</name>
      <url>https://repo.maven.apache.org/maven2</url>
      <layout>default</layout>
      <snapshots>
        <enabled>false</enabled>
      </snapshots>
    </repository>
  </repositories>

conf/settings.xml

  <!-- localRepository
   | The path to the local repository maven will use to store artifacts.
   |
   | Default: ${user.home}/.m2/repository
  <localRepository>/path/to/local/repo</localRepository>
  -->

download from maven central repository
basic file structure

maven01 
	--src
		--main
			--java
				--package: HelloWorldMVN.java
			--resources
		--testMVN
			--java		
				--package: HelloWorldMVNTest.java
			--resources
	--pom.xml
	--[target]

maven compile: create target file under maven01

D:\test\maven01> maven compile
...Downloading from central: https://repo.maven.apache.org/maven2/junit/junit/4.3/junit-4.3.pom...
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
D:\test\maven01> maven test
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
D:\test\maven01>mvn test-compile
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
D:\test\maven01>mvn help:evaluate -Dexpression=settings.localRepository
C:\Users\Administrator\.m2\repository

D:\Program Files\apache-maven-3.6.3\conf\settings.xml
repo2

  <mirror>
      <id>repo2id>
      <mirrorOf>centralmirrorOf>
      <name>Human Readable Name for this Mirror.name>
      <url>https://repo.maven.apache.org/maven2/url>
    mirror>

dependencies
1. groupId
1. artifactId
1. version
1. package: zip, war, jar
1. classfier
Hbase: hadoop database, uses rowkey, columnkey
maven
maven search
MAVEN01 project
pom.xml



<project>
  <modelVersion>4.0.0modelVersion>
  
  
 <groupId>com.abc.mavengroupId>
   
 <artifactId>maven-demo1artifactId>
   
     
 <version>1.0.0SNAPSHOT version>
   
<dependencies>
<dependency>
    <groupId>junitgroupId>
    <artifactId>junitartifactId>
    <version>4.3version>
dependency>
dependencies>
project>

HelloWorldMVN.java

package com.abc.maven.helloworld;
public class HelloWorldMVN{
public String helloMaven(){
return "Hello maven";}
}

HelloworldmvnTest.java

package com.abc.maven.helloworld;
import org.junit.*;
public class HelloWorldMVNTest{
@Test
public void testHello(){
	Assert.assertEquals("Hello maven", new HelloWorldMVN().helloMaven());
}	
}

com.abc.maven.helloworld.HelloWorldMVNTest.txt

-------------------------------------------------------------------------------
Test set: com.abc.maven.helloworld.HelloWorldMVNTest
-------------------------------------------------------------------------------
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.02 sec

add jar package into classpath (mvn install…mvn clean) …import…using pom.xml
get info from .pom file
groupId+artifactId(com.abc.maven.maven-demo1)

 <groupId>com.abc.mavengroupId>
 <artifactId>maven-demo1artifactId>
 <version>1.0.0SNAPSHOT version>

compile then test

D:\test\maven01>mvn install
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
D:\test\maven01>mvn clean
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
D:\test\maven01>cd ..\maven02
D:\test\maven02>mvn compile
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
D:\test\maven02>mvn clean compile test
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------

pom.xml


<project>
  <modelVersion>4.0.0modelVersion>
  
 <groupId>com.abc.mavengroupId>
 <artifactId>maven-demo2artifactId>
 <version>0.0.1SNAPSHOT version>
<dependencies>
<dependency>
    <groupId>junitgroupId>
    <artifactId>junitartifactId>
    <version>4.9version>
dependency>
<dependency>
 <groupId>com.abc.mavengroupId>
 <artifactId>maven-demo1artifactId>
 <version>1.0.0SNAPSHOT version>
dependency>
dependencies>
project>

package com.abc.maven02.hellomaven;
import  com.abc.maven.helloworld.HelloWorldMVN;
public class HelloMaven{
	public String sayMaven(){
		return new HelloWorldMVN().helloMaven();
	}
}

package com.abc.maven02.hellomaven;
import org.junit.*;
public class HelloMavenTest{
	@Test
	public void testSayMave(){
		Assert.assertEquals("Hello maven", new HelloMaven().sayMaven());
	}
}

-------------------------------------------------------------------------------
Test set: com.abc.maven02.hellomaven.HelloMavenTest
-------------------------------------------------------------------------------
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.035 sec

archetype:generate create file structure
maven-archetype-quickstart
mvn archetype:generate -DgroupId=com.abc.maven04 -DartifactId=maven-demo04 -Dversion=1.0-SNAPSHOT

D:\test\maven03>mvn archetype:generate
...
Choose a number or apply filter (format: [groupId:]artifactId, case sensitive contains): 1758:
Choose org.apache.maven.archetypes:maven-archetype-quickstart version:
1: 1.0-alpha-1
2: 1.0-alpha-2
3: 1.0-alpha-3
4: 1.0-alpha-4
5: 1.0
6: 1.1
7: 1.3
8: 1.4
Choose a number: 8:
Define value for property 'groupId': com.abc.maven03
Define value for property 'artifactId': maven-demo03
Define value for property 'version' 1.0-SNAPSHOT: :
Define value for property 'package' com.abc.maven03: :
Confirm properties configuration:
groupId: com.abc.maven03
artifactId: maven-demo03
version: 1.0-SNAPSHOT
package: com.abc.maven03
 Y: : y
[INFO] ----------------------------------------------------------------------------
[INFO] Using following parameters for creating project from Archetype: maven-archetype-qui
ckstart:1.4
[INFO] ----------------------------------------------------------------------------
[INFO] Parameter: groupId, Value: com.abc.maven03
[INFO] Parameter: artifactId, Value: maven-demo03
[INFO] Parameter: version, Value: 1.0-SNAPSHOT
[INFO] Parameter: package, Value: com.abc.maven03
[INFO] Parameter: packageInPathFormat, Value: com/abc/maven03
[INFO] Parameter: package, Value: com.abc.maven03
[INFO] Parameter: version, Value: 1.0-SNAPSHOT
[INFO] Parameter: groupId, Value: com.abc.maven03
[INFO] Parameter: artifactId, Value: maven-demo03
[INFO] Project created from Archetype in dir: D:\test\maven03\maven-demo03
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------

result
Dpackage=com.abc.maven; DgroupId=company+project; DartifactId=project+module; Dversion=version
archetype 1. quickstart 2. webapp 3. simple
repository> mvn archetype:crawl (generate archetype-catalog.xml)
put file under .m2 folder
maven03> mvn archetype:generate -DarchetypeCatalog=local

test>mvn archetype:generate -DgroupId=com.abc.maven04 -DartifactId=maven-demo04 -Dversion=1.0-SNAPSHOT -Dpackage=com.abc.maven04
...
Choose a number or apply filter (format: [groupId:]artifactId, case sensitive contains): 1
758:
Choose org.apache.maven.archetypes:maven-archetype-quickstart version:
1: 1.0-alpha-1
2: 1.0-alpha-2
3: 1.0-alpha-3
4: 1.0-alpha-4
5: 1.0
6: 1.1
7: 1.3
8: 1.4
Choose a number: 8: 6
Downloading from central: https://repo.maven.apache.org/maven2/org/apache/maven/archetypes
/maven-archetype-bundles/4/maven-archetype-bundles-4.pom
Downloaded from central: https://repo.maven.apache.org/maven2/org/apache/maven/archetypes/
maven-archetype-bundles/4/maven-archetype-bundles-4.pom (3.6 kB at 9.0 kB/s)
Downloading from central: https://repo.maven.apache.org/maven2/org/apache/maven/archetype/
maven-archetype/2.0-alpha-5/maven-archetype-2.0-alpha-5.pom
Downloaded from central: https://repo.maven.apache.org/maven2/org/apache/maven/archetype/m
aven-archetype/2.0-alpha-5/maven-archetype-2.0-alpha-5.pom (8.7 kB at 23 kB/s)
[INFO] Using property: groupId = com.abc.maven04
[INFO] Using property: artifactId = maven-demo04
[INFO] Using property: version = 1.0-SNAPSHOT
[INFO] Using property: package = com.abc.maven04
Confirm properties configuration:
groupId: com.abc.maven04
artifactId: maven-demo04
version: 1.0-SNAPSHOT
package: com.abc.maven04
 Y: : y
[INFO] ----------------------------------------------------------------------------
[INFO] Using following parameters for creating project from Old (1.x) Archetype: maven-arc
hetype-quickstart:1.1
[INFO] ----------------------------------------------------------------------------
[INFO] Parameter: basedir, Value: D:\test
[INFO] Parameter: package, Value: com.abc.maven04
[INFO] Parameter: groupId, Value: com.abc.maven04
[INFO] Parameter: artifactId, Value: maven-demo04
[INFO] Parameter: packageName, Value: com.abc.maven04
[INFO] Parameter: version, Value: 1.0-SNAPSHOT
[INFO] project created from Old (1.x) Archetype in dir: D:\test\maven-demo04
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
...
C:\Users\Administrator\.m2>mvn archetype:crawl 
...

D:\test\maven-demo04>mvn install archetype:update-local-catalog
[INFO] --- maven-archetype-plugin:3.2.0:update-local-catalog (default-cli) @ maven-demo04
---
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------

result
platforms: 1. myEclipse 2.intelj
myEclipse: install new software
myEclipse: window: preference
drop in jar file, restart
error: could not get the value for parameter encoding for plugin execution default-resources

Close Eclipse.
Navigate to user home directory. (For example: “C:\Users\YourUserName.m2”) ; Delete the “repository” folder.
Re-open Eclipse.
Click on the Maven project that has an issue and go to “Project” --> “Clean”.
Right-click on the project and go to “Maven” --> “Update Project…”.
Close Eclipse. Open Eclipse.
Click on the project folder in the “Project Explorer” window (usually on the left).
Hit the “F5” key to Refresh your project.

error: POM: org.apache.maven.archiver.MavenArchiver.getManifest(org.apache.maven.project.MavenProject, org.apache.maven.archiver.MavenArchiveConfiguration)
https://repo1.maven.org/maven2/.m2e/connectors/m2eclipse-mavenarchiver/0.17.2/N/LATEST/
1. Close Eclipse. Open Eclipse.
1. Click on the project folder in the “Project Explorer” window (usually on the left).
1. Hit the “F5” key to Refresh your project.
1. recreate maven project
1. choose :
error: -Dmaven.multiModuleProjectDirectory system is not set
right click JRE system library>build path> configure build path
1. eclipse> window> show view> other> problems
1. window> preferences>maven>installations> add
1. window>preferences>maven>User Settings
1. new>other>maven project
1. run as> 1.maven build (clean test)
result

[INFO] --- maven-surefire-plugin:2.12.4:test (default-test) @ maven-demo01 ---
[INFO] Surefire report directory: D:\MEWorkspace\maven-demo01\target\surefire-reports
-------------------------------------------------------
 T E S T S
-------------------------------------------------------
Running com.abc.maven.maven_demo01.AppTest
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.005 sec
Results :
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS

3 classpath: compile, test, runtime
6 dependency scope:
1. compile: default (all three)
1. provided: compile, test, servlet api
1. runtime: test, runtime, JDBC driver
1. test: cannot use junit
1. system: use system path instead of maven repository
1. import
code for dependency

 <dependencies>
    <dependency>
      <groupId>junitgroupId>
      <artifactId>junitartifactId>
      <version>3.8.1version>
      <scope>testscope>
    dependency>
  dependencies>

left column> upper row
1. coordinates
1. dependency scope
1. dependency delivery
1. dependency conflict: short route first (a>b>c>d)vs (a>b>d) ; same distance must declare precedence
1. dependency life cycle : clean>test>install/build
1. dependency life cycle ( clean: pre-clean>clean>post-clean)
1. dependency life cycle (default: validate>compile>test>package>integration0test>verify>install>deploy)
1. dependency life cycle (site: pre-site>site>post-site>site-deploy)
1. maven plugins (maven source plugin )
1. collections and inheritence
example
employee > manager > boss
maven clean> maven install> maven build

company-boss pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0modelVersion>
  <groupId>com.abc.mavengroupId>
  <artifactId>company-bossartifactId>
  <version>0.0.1-SNAPSHOTversion>
  <packaging>jarpackaging>
  <name>company-bossname>
  <url>http://maven.apache.orgurl>
  <properties>
    <project.build.sourceEncoding>UTF-8project.build.sourceEncoding>
  properties>
  <dependencies>
    <dependency>
      <groupId>junitgroupId>
      <artifactId>junitartifactId>
      <version>3.8.1version>
      <scope>testscope>
    dependency>
  dependencies>
project>

company-manager pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0modelVersion>
	<groupId>com.abc.mavengroupId>
	<artifactId>company-managerartifactId>
	<version>0.0.1-SNAPSHOTversion>
	<packaging>jarpackaging>
	<name>company-managername>
	<url>http://maven.apache.orgurl>
	<properties>
		<project.build.sourceEncoding>UTF-8project.build.sourceEncoding>
	properties>
	<dependencies>
		<dependency>
			<groupId>junitgroupId>
			<artifactId>junitartifactId>
			<version>3.8.1version>
			<scope>testscope>
		dependency>
				
		<dependency>
			<groupId>com.abc.mavengroupId>
			<artifactId>company-bossartifactId>
			<version>0.0.1-SNAPSHOTversion>
		dependency>
	dependencies>
project>

company-employee pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0modelVersion>

  <groupId>com.abc.mavengroupId>
  <artifactId>company-employeeartifactId>
  <version>0.0.1-SNAPSHOTversion>
  <packaging>jarpackaging>
  <name>company-employeename>
  <url>http://maven.apache.orgurl>
  <properties>
    <project.build.sourceEncoding>UTF-8project.build.sourceEncoding>
  properties>
  <dependencies>
    <dependency>
      <groupId>junitgroupId>
      <artifactId>junitartifactId>
      <version>3.8.1version>
      <scope>testscope>
    dependency>
    
      <dependency>
		  <groupId>com.abc.mavengroupId>
		  <artifactId>company-managerartifactId>
		  <version>0.0.1-SNAPSHOTversion>
    dependency>
  dependencies>
project>

for employee not to rely on boss and only employee add in dependency for company-manager:

     <dependency>
		  <groupId>com.abc.mavengroupId>
		  <artifactId>company-managerartifactId>
		  <version>0.0.1-SNAPSHOTversion>
			<exclusions>
				<exclusion>
						<groupId>com.abc.mavengroupId>
						<artifactId>company-bossartifactId>
				exclusion>
			exclusions>    
	dependency>

result

-------------------------------------------------------
 T E S T S
-------------------------------------------------------
Running com.abc.maven.company_employee.AppTest
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.005 sec

Results :

Tests run: 1, Failures: 0, Errors: 0, Skipped: 0

[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] -----------------------------------------------------------------

employee> manager(commons-io 2.0)>boss(commons-io 2.4)
boss has shortest path therefore 2.4 is used
added dependency

		<dependency>
			<groupId>commons-iogroupId>
			<artifactId>commons-ioartifactId>
			<version>2.?version>
		dependency>

result
test plugin
add to maven-demo01 dom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0modelVersion>
  <groupId>com.abc.mavengroupId>
  <artifactId>maven-demo01artifactId>
  <version>0.0.1-SNAPSHOTversion>
  <packaging>jarpackaging>
  <name>maven-demo01name>
  <url>http://maven.apache.orgurl>
  <properties>
    <project.build.sourceEncoding>UTF-8project.build.sourceEncoding>
  properties>
  <dependencies>
    <dependency>
      <groupId>junitgroupId>
      <artifactId>junitartifactId>
      <version>3.8.1version>
      <scope>testscope>
    dependency>
  dependencies>
  	<build>
		<plugins>
			<plugin>
				<groupId>org.apache.maven.pluginsgroupId>
				<artifactId>maven-source-pluginartifactId>
				<version>3.2.0version>
				<executions>
					<execution>
						<phase>packagephase>
						<goals>
							<goal>jar-no-forkgoal>
						goals>
					execution>
				executions>
			plugin>
		plugins>
	build>
project>

result

[INFO] Building jar: D:\MEWorkspace\maven-demo01\target\maven-demo01-0.0.1-SNAPSHOT-sources.jar
...
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------

aggregation use modules for packages < packaging >pom…< modules >

pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0modelVersion>
	<groupId>com.abc.mavengroupId>
	<artifactId>company-aggregationartifactId>
	<version>0.0.1-SNAPSHOTversion>
	<packaging>pompackaging>
	<name>company-aggregationname>
	<url>http://maven.apache.orgurl>
	<properties>
		<project.build.sourceEncoding>UTF-8project.build.sourceEncoding>
	properties>
	<modules>
		<module>../company-bossmodule>
		<module>../company-managermodule>
		<module>../company-employeemodule>
	modules>
	<dependencies>
		<dependency>
			<groupId>junitgroupId>
			<artifactId>junitartifactId>
			<version>3.8.1version>
			<scope>testscope>
		dependency>
	dependencies>
project>

result

[INFO] Reactor Summary for company-aggregation 0.0.1-SNAPSHOT:
[INFO] 
[INFO] company-boss ....................................... SUCCESS [  0.502 s]
[INFO] company-manager .................................... SUCCESS [  0.020 s]
[INFO] company-employee ................................... SUCCESS [  0.010 s]
[INFO] company-aggregation ................................ SUCCESS [  0.005 s]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------

inheritance
check for version junit : ctrl+ version
delete src/test/java
use dependencyManagement < junit.version>4.10< /junit.version> < version>${junit.version}< /version>
dependency passed to children projects (dependencies)

company-parent pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0modelVersion>
  <groupId>com.abc.mavengroupId>
  <artifactId>company-parentartifactId>
  <version>0.0.1-SNAPSHOTversion>
  <packaging>pompackaging>
  <name>company-parentname>
  <url>http://maven.apache.orgurl>
  <properties>
    <project.build.sourceEncoding>UTF-8project.build.sourceEncoding>
    <junit.version>4.10junit.version>
  properties> 
<dependencyManagement>
  <dependencies>
    <dependency>
      <groupId>junitgroupId>
      <artifactId>junitartifactId>
      <version>${junit.version}version>
      <scope>testscope>
    dependency>
  dependencies>
  dependencyManagement>
project>

changes to other (boss, manager, employee pom.xml)
remove < groupId>com.abc.maven< /groupId> ; < version>0.0.1-SNAPSHOT< /version>

  <parent>
    <groupId>com.abc.mavengroupId>
  <artifactId>company-parentartifactId>
  <version>0.0.1-SNAPSHOTversion>
  parent>
	<dependencies>
		<dependency>
			<groupId>junitgroupId>
			<artifactId>junitartifactId>
		dependency>

result

[INFO] Building company-parent 0.0.1-SNAPSHOT
[INFO] --------------------------------[ pom ]---------------------------------
[INFO] 
[INFO] --- maven-install-plugin:2.4:install (default-install) @ company-parent ---
[INFO] Installing D:\MEWorkspace\company-parent\pom.xml to C:\Users\Administrator\.m2\repository\com\abc\maven\company-parent\0.0.1-SNAPSHOT\company-parent-0.0.1-SNAPSHOT.pom
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------

MAVEN WEB
error : the superclass “javax.servlet.http.HttpServlet” was not found…
java Servlet
add dependency to pom.xml < groupId>javax.servlet…< artifactId>… < version> …
change scope to provided < scope> provided …for servlet…dependency
change maven project to web project: project> properties> project facet> convert to facet form> dynamic web module
select java 1.8
check src>main>webapp>WEB-INF
remove test/ from properties/deployment assembly
add new source folder to maven-web: src/test/resources
check build path
maven-web
maven-web pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
	<modelVersion>4.0.0modelVersion>
	<groupId>com.abc.mavengroupId>
	<artifactId>maven-webartifactId>
	<packaging>warpackaging>
	<version>0.0.1-SNAPSHOTversion>
	<name>maven-web Maven Webappname>
	<url>http://maven.apache.orgurl>
	<dependencies>
		<dependency>
			<groupId>junitgroupId>
			<artifactId>junitartifactId>
			<version>3.8.1version>
			<scope>testscope>
		dependency>
		
		<dependency>
			<groupId>javax.servletgroupId>
			<artifactId>javax.servlet-apiartifactId>
			<version>4.0.1version>
			<scope>providedscope>
		dependency>
	dependencies>
	<build>
		<finalName>maven-webfinalName>
	build>
project>

result

[INFO] Installing D:\MEWorkspace\maven-web\pom.xml to C:\Users\Administrator\.m2\repository\com\abc\maven\maven-web\0.0.1-SNAPSHOT\maven-web-0.0.1-SNAPSHOT.pom
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------

run maven web deployment: jetty: lightweight web server : jetty maven
add to pom.xml

...
	<packaging>warpackaging>
...
	<build>
		<finalName>maven-webfinalName>
		<plugins>
			<plugin>
				<groupId>org.eclipse.jettygroupId>
				<artifactId>jetty-maven-pluginartifactId>
				<version>9.4.8.v20180619version>		
			plugin>		
		plugins>
	build>

use “jetty:run” as maven build goal
result:

[INFO] jetty-9.4.8.v20180619, build timestamp: 2018-06-21T07:55:30+08:00, git hash: ...
[INFO] Started o.e.j.m.p.JettyWebAppContext@29138d3a{/,file:///D:/MEWorkspace/maven-web/src/main/webapp/,AVAILABLE}{file:///D:/MEWorkspace/maven-web/src/main/webapp/}
[INFO] Started ServerConnector@58437801{HTTP/1.1,[http/1.1]}{0.0.0.0:8080}
[INFO] Started @46013ms
[INFO] Started Jetty Server

result
use “package” as maven build goal
add to pom.xml

...
	<packaging>warpackaging>
...
<build>
		<finalName>maven-webfinalName>
		<plugins>
			<plugin>
				<groupId>org.eclipse.jettygroupId>
				<artifactId>jetty-maven-pluginartifactId>
				<version>9.4.8.v20180619version>
				<executions>
					<execution>
						<phase>packagephase>
						<goals>
							<goal>rungoal>
						goals>
					execution>
				executions>
			plugin>
		plugins>
	build>

run maven web deployment: tomcat : tomcat plugin
get rid of jetty plugin
add to pom.xml

			<plugin>
				
				<groupId>org.apache.tomcat.mavengroupId>
				<artifactId>tomcat7-maven-pluginartifactId>
				<version>2.2version>
				<executions>
					<execution>
						<phase>packagephase>
						<goals>
							<goal>rungoal>
						goals>
					execution>
				executions>
			plugin>

error: Failed to initialize end point associated with ProtocolHandler [“http-bio-8080”] java.net.BindException: Address already in use: JVM_Bind < null>:8080
cmd

D:\>netstat -ano|findstr 8080
  TCP    0.0.0.0:8080           0.0.0.0:0              LISTENING       30664
  TCP    [::]:8080              [::]:0                 LISTENING       30664
D:\>taskkill /pid 30664 /f
成功: 已终止 PID 为 30664 的进程。

result

三月 31, 2021 6:58:53 上午 org.apache.coyote.AbstractProtocol init
信息: Initializing ProtocolHandler ["http-bio-8080"]
三月 31, 2021 6:58:53 上午 org.apache.catalina.core.StandardService startInternal
信息: Starting service Tomcat
三月 31, 2021 6:58:53 上午 org.apache.catalina.core.StandardEngine startInternal
信息: Starting Servlet Engine: Apache Tomcat/7.0.47
三月 31, 2021 6:58:54 上午 org.apache.coyote.AbstractProtocol start
信息: Starting ProtocolHandler ["http-bio-8080"]

result:
problems gbk>utf-8
solve

<properties>
<project.build.sourceEncoding>UTF-8project.build.sourceEncoding>
properties>
...
<plugin>
<artifactId>maven-compiler-pluginartifactId>
<configuration> 
<source>1.6source>
<target>1.6target>
<encoding>utf8encoding>
configuration>
plugin>

problems xxx.jar was cached in the local repository, resolution will not be reattempted until…
solve:
< updatePolicy>always< /updatePolicy> under settings.xml ( not recommeded) (always, daily, interval:X min, never)
or…delete lastUpdated file, update file…
or…delete org.apache.plugin:maven-source-plugin, redownload
problems connection refused; connection timeout
solve:
dos: ping www.something.com
install jar offline: put jar in .m2/repository
tips: use QuickFix
Update Project
Configure build path
problem: change to 1.5 instead of 1.8 or higher
solve:
add to pom.xml

<plugin>
<groupId>org.apache.maven.pluginsgroupId>
<artifactId>maven-compiler-pluginartifactId>
<version>3.1version>
<configuration>
<source>1.8source>
<target>1.8target>
<encoding>utf8encoding>
configuration>
plugin>

/pom.xml :: < packaging>pom< /packaging>
/common-lib/ :: < packaging>jar< /packaging>
/public-webapp/ :: < packaging>war< /packaging> < dependency>common-lib
/admin-webapp/ :: < packaging>war< /packaging> < dependency>common-lib< /dependency>
/corporate-webapp/ :: < packaging>war< /packaging> < dependency>common-lib< /dependency>
COMMANDS
maven commands: 1. mvn -v or mvn -version
maven commands: 2. mvn help: system (MAVEN_HOME=D:\Program Files\apache-maven-3.6.3\bin…)
maven commands: 3. mvn compile (downloading: http://repo…)
maven commands: 4. mvn test
maven commands: 5. mvn test-compile
maven commands: 6. mvn help:evaluate -Dexpression=settings.localRepository (find local repo)
maven commands: 7. mvn install (install current package into repository, add groupId, artifactId, version to pom.xml)
maven commands: 8. mvn clean compile test
maven commands: 9. mvn clean (clean file before install into jar file)
maven commands: 10. mvn archetype:generate (create file structure)
maven commands: 11.mvn archetype:generate -DgroupId=com.abc.maven04 -DartifactId=maven-demo04 -Dversion=1.0-SNAPSHOT -Dpackage=com.abc.maven04
maven commands: 12. mvn archetype:crawl (generate archetype-catalog.xml)
maven commands: 13. mvn archetype:generate -DarchetypeCatalog=local (generate testfile ???)
maven commands: 14. mvn install archetype:update-local-catalog

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