代码上传到gitee了:https://gitee.com/key2136/ssmmin
数据库名称为: zxc
/*
Navicat MySQL Data Transfer
Source Server : location
Source Server Type : MySQL
Source Server Version : 50729
Source Host : localhost:3306
Source Schema : zxc
Target Server Type : MySQL
Target Server Version : 50729
File Encoding : 65001
Date: 19/05/2022 15:52:35
*/
SET NAMES utf8mb4;
SET FOREIGN_KEY_CHECKS = 0;
-- ----------------------------
-- Table structure for phone
-- ----------------------------
DROP TABLE IF EXISTS `phone`;
CREATE TABLE `phone` (
`phoneId` int(11) NOT NULL AUTO_INCREMENT,
`phoneName` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NULL DEFAULT NULL,
`phonePrice` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NULL DEFAULT NULL,
PRIMARY KEY (`phoneId`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 4 CHARACTER SET = utf8mb4 COLLATE = utf8mb4_unicode_ci ROW_FORMAT = DYNAMIC;
-- ----------------------------
-- Records of phone
-- ----------------------------
INSERT INTO `phone` VALUES (1, '华为', '4000');
INSERT INTO `phone` VALUES (2, '苹果', '5000');
INSERT INTO `phone` VALUES (3, '小米', '3000');
-- ----------------------------
-- Table structure for user
-- ----------------------------
DROP TABLE IF EXISTS `user`;
CREATE TABLE `user` (
`username` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NOT NULL,
`password` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NULL DEFAULT NULL,
PRIMARY KEY (`username`) USING BTREE
) ENGINE = InnoDB CHARACTER SET = utf8mb4 COLLATE = utf8mb4_unicode_ci ROW_FORMAT = DYNAMIC;
-- ----------------------------
-- Records of user
-- ----------------------------
INSERT INTO `user` VALUES ('user', '123456');
SET FOREIGN_KEY_CHECKS = 1;
1、新建一Maven项目!
添加web项目,添加tomcat,添加lib目录导包
参考: Intellij IDEA 建立一个新的 Spring MVC 模块_KEY的航行日记的博客-CSDN博客
【idea新建一个web项目】Intellij IDEA 2020.1.1创建Java web项目(详细图文教程)_KEY的航行日记的博客-CSDN博客
有些不完善,懒得改了
2、导入相关的pom.xml依赖 及 Maven静态资源过滤
<dependencies>
<dependency>
<groupId>junitgroupId>
<artifactId>junitartifactId>
<version>4.12version>
dependency>
<dependency>
<groupId>mysqlgroupId>
<artifactId>mysql-connector-javaartifactId>
<version>5.1.47version>
dependency>
<dependency>
<groupId>com.mchangegroupId>
<artifactId>c3p0artifactId>
<version>0.9.5.2version>
dependency>
<dependency>
<groupId>javax.servletgroupId>
<artifactId>servlet-apiartifactId>
<version>2.5version>
dependency>
<dependency>
<groupId>javax.servlet.jspgroupId>
<artifactId>jsp-apiartifactId>
<version>2.2version>
dependency>
<dependency>
<groupId>javax.servletgroupId>
<artifactId>jstlartifactId>
<version>1.2version>
dependency>
<dependency>
<groupId>org.mybatisgroupId>
<artifactId>mybatisartifactId>
<version>3.5.2version>
dependency>
<dependency>
<groupId>org.mybatisgroupId>
<artifactId>mybatis-springartifactId>
<version>2.0.2version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-webmvcartifactId>
<version>5.1.9.RELEASEversion>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-jdbcartifactId>
<version>5.1.9.RELEASEversion>
dependency>
dependencies>
<build>
<resources>
<resource>
<directory>src/main/javadirectory>
<includes>
<include>**/*.propertiesinclude>
<include>**/*.xmlinclude>
includes>
<filtering>falsefiltering>
resource>
<resource>
<directory>src/main/resourcesdirectory>
<includes>
<include>**/*.propertiesinclude>
<include>**/*.xmlinclude>
includes>
<filtering>falsefiltering>
resource>
resources>
build>
3、建立基本结构和配置框架
配置文件的头文件如下
DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
configuration>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd">
beans>
3、Mybatis层编写
1、数据库配置文件
database.properties
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql:///zxc?useSSL=false&3useUnicode=true&characterEncoding=utf8
jdbc.username=root
jdbc.password=123456
2、IDEA关联数据库(可省略)
3、编写MyBatis的核心配置文件
mybatis-config.xml
DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<typeAliases>
<package name="com.hncj.pojo"/>
typeAliases>
<mappers>
<mapper resource="com/hncj/dao/PhoneMapper.xml"/>
mappers>
configuration>
4、编写数据库对应的实体类
com.kuang.pojo.Phone
package com.hncj.pojo;
public class Phone {
private int phoneId;
private String phoneName;
private String phonePrice;
public Phone() {
}
//添加 有参无参构造方法、set、get、toSting() 快捷键:Alt+Insert
5、编写Dao层的 Mapper接口!
com.hncj.dao.PhoneMapper
package com.hncj.dao;
import com.hncj.pojo.Phone;
import org.springframework.stereotype.Component;
import java.util.List;
public interface PhoneMapper {
// 查询所有的手机
List<Phone> queryAllPhone();
// 添加一个手机
int addPhone(Phone phone);
// 根据id删除一个手机
int deletePhone(int id);
// 修改(更新)手机的信息
int updatePhone(Phone phone);
// 根据id返回一个Phone
Phone queryPhoneById(int id);
}
6、编写接口对应的 Mapper.xml 文件。需要导入MyBatis的包;
com.hncj.dao.PhoneMapper.xml
DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.hncj.dao.PhoneMapper">
<select id="queryAllPhone" resultType="Phone">
select * from zxc.phone
select>
<insert id="addPhone" parameterType="Phone">
insert into zxc.phone(phoneName,phonePrice)
value (#{phoneName},#{phonePrice})
insert>
<delete id="deletePhone" parameterType="int">
delete from zxc.phone where phoneID = #{phoneId}
delete>
<update id="updatePhone" parameterType="Phone">
update zxc.phone set phoneName = #{phoneName},phonePrice = #{phonePrice}
where phoneID = #{phoneId}
update>
<select id="queryPhoneById" resultType="Phone">
select * from zxc.phone where phoneId = #{phoneId}
select>
mapper>
7、编写Service层的接口和实现类
com.kuang.service.PhoneService
package com.hncj.service;
import com.hncj.pojo.Phone;
import org.springframework.stereotype.Service;
import java.util.List;
public interface PhoneService {
// 查询所有的手机
List<Phone> queryAllPhone();
// 添加一个手机
int addPhone(Phone phone);
// 根据id删除一个手机
int deletePhone(int id);
// 修改(更新)手机的信息
int updatePhone(Phone phone);
// 根据id返回一个Phone
Phone queryPhoneById(int id);
}
com.kuang.service.PhoneServiceImpl
package com.hncj.service;
import com.hncj.dao.PhoneMapper;
import com.hncj.pojo.Phone;
import org.springframework.stereotype.Component;
import java.util.List;
@Component
public class PhoneServiceImpl implements PhoneService {
private PhoneMapper phoneMapper;
//调用dao层的操作,设置一个set接口,方便Spring管理
//set方式注入IOC容器中, 在spring-service.xml配置注入
public void setPhoneMapper(PhoneMapper phoneMapper) {
this.phoneMapper = phoneMapper;
}
public List<Phone> queryAllPhone() {
return phoneMapper.queryAllPhone();
}
public int addPhone(Phone phone) {
return phoneMapper.addPhone(phone);
}
public int deletePhone(int id) {
return phoneMapper.deletePhone(id);
}
public int updatePhone(Phone phone) {
return phoneMapper.updatePhone(phone);
}
public Phone queryPhoneById(int id) {
return phoneMapper.queryPhoneById(id);
}
}
到此,底层需求操作编写完毕!
1、配置Spring整合MyBatis,我们这里数据源使用c3p0连接池;
2、我们去编写Spring整合Mybatis的相关的配置文件;
spring-dao.xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
https://www.springframework.org/schema/context/spring-context.xsd">
<context:property-placeholder location="classpath:database.properties"/>
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="${jdbc.driver}"/>
<property name="jdbcUrl" value="${jdbc.url}"/>
<property name="user" value="${jdbc.username}"/>
<property name="password" value="${jdbc.password}"/>
<property name="maxPoolSize" value="30"/>
<property name="minPoolSize" value="10"/>
<property name="autoCommitOnClose" value="false"/>
<property name="checkoutTimeout" value="10000"/>
<property name="acquireRetryAttempts" value="2"/>
bean>
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<property name="configLocation" value="classpath:mybatis-config.xml"/>
bean>
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
<property name="basePackage" value="com.hncj.dao"/>
bean>
beans>
3、Spring整合service层
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd">
<context:component-scan base-package="com.hncj.service" />
<bean id="PhoneServiceImpl" class="com.hncj.service.PhoneServiceImpl">
<property name="phoneMapper" ref="phoneMapper"/>
bean>
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
bean>
beans>
Spring层搞定!再次理解一下,Spring就是一个大杂烩,一个容器!对吧!
1、web.xml
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
version="4.0">
<servlet>
<servlet-name>DispatcherServletservlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServletservlet-class>
<init-param>
<param-name>contextConfigLocationparam-name>
<param-value>classpath:applicationContext.xmlparam-value>
init-param>
<load-on-startup>1load-on-startup>
servlet>
<servlet-mapping>
<servlet-name>DispatcherServletservlet-name>
<url-pattern>/url-pattern>
servlet-mapping>
<filter>
<filter-name>encodingFilterfilter-name>
<filter-class>
org.springframework.web.filter.CharacterEncodingFilter
filter-class>
<init-param>
<param-name>encodingparam-name>
<param-value>utf-8param-value>
init-param>
filter>
<filter-mapping>
<filter-name>encodingFilterfilter-name>
<url-pattern>/*url-pattern>
filter-mapping>
<session-config>
<session-timeout>15session-timeout>
session-config>
web-app>
2、spring-mvc.xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/mvc
https://www.springframework.org/schema/mvc/spring-mvc.xsd">
<mvc:annotation-driven/>
<mvc:default-servlet-handler/>
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
<property name="prefix" value="/WEB-INF/jsp/"/>
<property name="suffix" value=".jsp"/>
bean>
<context:component-scan base-package="com.hncj.controller"/>
beans>
3、Spring配置整合文件,applicationContext.xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd">
<import resource="spring-dao.xml"/>
<import resource="spring-service.xml"/>
<import resource="spring-mvc.xml"/>
beans>
配置文件,暂时结束!
这里做一个测试,检查一下底层代码是否搭建成功
@Test
public void Text1() {
ApplicationContext con = new ClassPathXmlApplicationContext("applicationContext.xml");
PhoneService phoneServiceImpl = (PhoneService) con.getBean("PhoneServiceImpl");
for (Phone phone : phoneServiceImpl.queryAllPhone()) {
System.out.println(phone);
}
}
在之前我遇到一个bug,bean注入失败,在下面这个文章里
【已解决】SSM中bean注入失败 Error creating bean with name ‘XXX.xml‘ defined in class path resource
PhoneController
package com.hncj.controller;
import com.hncj.pojo.Phone;
import com.hncj.service.PhoneService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import java.util.List;
/*
@Controller注解类型用于声明Spring类的实例是一个控制器
Spring可以使用扫描机制来找到应用程序中所有基于注解的控制器类,
为了保证Spring能找到你的控制器,需要在配置文件中声明组件扫描。
*/
/*
@RequestMapping注解用于映射url到控制器类或一个特定的处理程序方法。
可用于类或方法上。用于类上,表示类中的所有响应请求的方法都是以该地址作为父路径。
*/
@Controller
@RequestMapping("/phone")
public class PhoneController {
/*
@Autowired是根据byType自动装配的,加上@Qualifier则可以根据byName的方式自动装配
@Qualifier不能单独使用。
*/
@Autowired
@Qualifier("PhoneServiceImpl")
private PhoneService phoneService;
//查询全部手机
@RequestMapping("/allPhone")
public String list(Model model){
List<Phone> list = phoneService.queryAllPhone();
model.addAttribute("list",list);
return "allPhone";
}
//新增手机
@RequestMapping("toAddPhone")
public String toAddPhone(){
return "addPhone";
}
@RequestMapping("addPhone")
public String addPhone(Phone phone){
phoneService.addPhone(phone);
System.out.println(phone);
return "redirect:/phone/allPhone";
}
//修改手机
@RequestMapping("/toUpdatePhone")
public String toUpdatePhone(Model model, int id){
Phone phone = phoneService.queryPhoneById(id);
System.out.println(phone);
model.addAttribute("phone",phone);
return "updatePhone";
}
@RequestMapping("/updatePhone")
public String updatePhone(Model model,Phone phone){
System.out.println(phone);
phoneService.updatePhone(phone);
Phone phone1 = phoneService.queryPhoneById(phone.getPhoneId());
model.addAttribute("phone1",phone1);
return "redirect:/phone/allPhone";
}
//删除手机
@RequestMapping("/del/{id}")
public String deletePhone(@PathVariable("id") int id){
phoneService.deletePhone(id);
return "redirect:/phone/allPhone";
}
}
index.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %>
DOCTYPE HTML>
<html>
<head>
<title>首页title>
<style type="text/css">
a {
text-decoration: none;
color: black;
font-size: 18px;
}
h3 {
width: 180px;
height: 38px;
margin: 100px auto;
text-align: center;
line-height: 38px;
background: deepskyblue;
border-radius: 4px;
}
style>
head>
<body>
<h3>
<a href="${pageContext.request.contextPath}/phone/allPhone ">点击进入列表页a>
h3>
body>
html>
allphone.jsp
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>手机列表title>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
head>
<body>
<div class="container">
<div class="row clearfix">
<div class="col-md-12 column">
<div class="page-header">
<h1>
<small>手机列表 —— 显示所有手机small>
h1>
div>
div>
div>
<div class="row">
<div class="col-md-4 column">
<a class="btn btn-primary" href="${pageContext.request.contextPath}/phone/toAddPhone">新增a>
div>
div>
<div class="row clearfix">
<div class="col-md-12 column">
<table class="table table-hover table-striped">
<thead>
<tr>
<th>手机编号th>
<th>手机名字th>
<th>手机价格th>
<th>操作th>
tr>
thead>
<tbody>
<c:forEach var="phone" items="${requestScope.get('list')}">
<tr>
<td>${phone.getPhoneId()}td>
<td>${phone.getPhoneName()}td>
<td>${phone.getPhonePrice()}td>
<td>
<a href="${pageContext.request.contextPath}/phone/toUpdatePhone?id=${phone.getPhoneId()}">更改a> |
<a href="${pageContext.request.contextPath}/phone/del/${phone.getPhoneId()}" onclick="return confirm('确认删除')">删除a>
td>
tr>
c:forEach>
tbody>
table>
div>
div>
div>
addPhone.jsp
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>修改信息</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<!-- 引入 Bootstrap -->
<link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>
<div class="container">
<div class="row clearfix">
<div class="col-md-12 column">
<div class="page-header">
<h1>
<small>新增手机</small>
</h1>
</div>
</div>
</div>
<form action="${pageContext.request.contextPath}/phone/addPhone" method="post">
手机名字:<input type="text" name="phoneName"><br><br><br>
手机价格:<input type="text" name="phonePrice"><br><br><br>
<input type="submit" value="新增">
</form>
</div>
updatePhone.jsp
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>修改信息title>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
head>
<body>
<div class="container">
<div class="row clearfix">
<div class="col-md-12 column">
<div class="page-header">
<h1>
<small>修改信息small>
h1>
div>
div>
div>
<form action="${pageContext.request.contextPath}/phone/updatePhone" method="post">
<input type="hidden" name="phoneId" value="${phone.getPhoneId()}"/>
手机名字:<input type="text" name="phoneName" value="${phone.getPhoneName()}"/>
手机价格:<input type="text" name="phonePrice" value="${phone.getPhonePrice()}"/>
<input type="submit" value="提交"/>
form>
div>
到目前为止,这个SSM项目整合已经完全的OK了
接下来开始修改和添加其他功能
最近在学别的东西,SSM先放一放,后续有时间会添加
PhoneMapper
//模糊查询
List<Phone> queryPhoneByName(String name);
PhoneMapper.xml
<select id="queryPhoneByName" parameterType="String" resultType="Phone">
select * from zxc.phone
where phoneName like #{phoneName}
select>
PhoneService
//模糊查询
List<Phone> queryPhoneByName(String name);
PhoneServiceImpl
public List<Phone> queryPhoneByName(String phoneName) {
return phoneMapper.queryPhoneByName(phoneName);
}
PhoneController
//模糊查询
@RequestMapping("/queryPhone")
public String likePhoneName(Model model,String phoneName){
List<Phone> phones = phoneService.queryPhoneByName("%" + phoneName + "%");
model.addAttribute("list",phones);
return "allPhone";
}
}
allPhone.jsp ps.注意添加的位置
<div class="row">
<div class="col-md-4 column">
<a class="btn btn-primary" href="${pageContext.request.contextPath}/phone/toAddPhone">新增a>
div>
<div class="col-md-4 column">
<form action="${pageContext.request.contextPath}/phone/queryPhone" method="post">
<label>
<input type="text" name="phoneName" class="form-control" placeholder="请输入手机名称" required>
label>
<input type="submit" value="查询" class="btn btn-primary">
form>
div>
div>