SpringBoot进行web的crud开发：显示列表页面
实验要求：
1）、RestfulCRUD：CRUD满足Rest风格；
URI： /资源名称/资源标识 HTTP请求方式区分对资源CRUD操作
| 普通CRUD（uri来区分操作） | RestfulCRUD | |
|---|---|---|
| 查询 | getEmp | emp—GET |
| 添加 | addEmp?xxx | emp—POST |
| 修改 | updateEmp?id=xxx&xxx=xx | emp/{id}—PUT |
| 删除 | deleteEmp?id=1 | emp/{id}—DELETE |
2）、实验的请求架构;
| 实验功能 | 请求URI | 请求方式 |
|---|---|---|
| 查询所有员工 | emps | GET |
| 查询某个员工(来到修改页面) | emp/1 | GET |
| 来到添加页面 | emp | GET |
| 添加员工 | emp | POST |
| 来到修改页面（查出员工进行信息回显） | emp/1 | GET |
| 修改员工 | emp | PUT |
| 删除员工 | emp/1 | DELETE |
跳转到list页面【假数据】
修改链接
<a class="nav-link" href="#" th:href="@{/emps}">
<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-users">
<path d="M17 21v-2a4 4 0 0 0-4-4H5a4 4 0 0 0-4 4v2">path>
<circle cx="9" cy="7" r="4">circle>
<path d="M23 21v-2a4 4 0 0 0-3-3.87">path>
<path d="M16 3.13a4 4 0 0 1 0 7.75">path>
svg>
员工管理
a>
增加控制器方法
list.html页面
<html lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<meta name="description" content="">
<meta name="author" content="">
<title>Dashboard Template for Bootstraptitle>
<link href="asserts/css/bootstrap.min.css" rel="stylesheet">
<link href="asserts/css/dashboard.css" rel="stylesheet">
<style type="text/css">
/* Chart.js */
@-webkit-keyframes chartjs-render-animation {
from {
opacity: 0.99
}
to {
opacity: 1
}
}
@keyframes chartjs-render-animation {
from {
opacity: 0.99
}
to {
opacity: 1
}
}
.chartjs-render-monitor {
-webkit-animation: chartjs-render-animation 0.001s;
animation: chartjs-render-animation 0.001s;
}
style>
head>
<body>
<nav class="navbar navbar-dark sticky-top bg-dark flex-md-nowrap p-0">
<a class="navbar-brand col-sm-3 col-md-2 mr-0" href="http://getbootstrap.com/docs/4.0/examples/dashboard/#">Company namea>
<input class="form-control form-control-dark w-100" type="text" placeholder="Search" aria-label="Search">
<ul class="navbar-nav px-3">
<li class="nav-item text-nowrap">
<a class="nav-link" href="http://getbootstrap.com/docs/4.0/examples/dashboard/#">Sign outa>
li>
ul>
nav>
<div class="container-fluid">
<div class="row">
<nav class="col-md-2 d-none d-md-block bg-light sidebar">
<div class="sidebar-sticky">
<ul class="nav flex-column">
<li class="nav-item">
<a class="nav-link active" href="http://getbootstrap.com/docs/4.0/examples/dashboard/#">
<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-home">
<path d="M3 9l9-7 9 7v11a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2z">path>
<polyline points="9 22 9 12 15 12 15 22">polyline>
svg>
Dashboard <span class="sr-only">(current)span>
a>
li>
<li class="nav-item">
<a class="nav-link" href="http://getbootstrap.com/docs/4.0/examples/dashboard/#">
<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-file">
<path d="M13 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V9z">path>
<polyline points="13 2 13 9 20 9">polyline>
svg>
Orders
a>
li>
<li class="nav-item">
<a class="nav-link" href="http://getbootstrap.com/docs/4.0/examples/dashboard/#">
<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-shopping-cart">
<circle cx="9" cy="21" r="1">circle>
<circle cx="20" cy="21" r="1">circle>
<path d="M1 1h4l2.68 13.39a2 2 0 0 0 2 1.61h9.72a2 2 0 0 0 2-1.61L23 6H6">path>
svg>
Products
a>
li>
<li class="nav-item">
<a class="nav-link" href="http://getbootstrap.com/docs/4.0/examples/dashboard/#">
<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-users">
<path d="M17 21v-2a4 4 0 0 0-4-4H5a4 4 0 0 0-4 4v2">path>
<circle cx="9" cy="7" r="4">circle>
<path d="M23 21v-2a4 4 0 0 0-3-3.87">path>
<path d="M16 3.13a4 4 0 0 1 0 7.75">path>
svg>
Customers
a>
li>
<li class="nav-item">
<a class="nav-link" href="http://getbootstrap.com/docs/4.0/examples/dashboard/#">
<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-bar-chart-2">
<line x1="18" y1="20" x2="18" y2="10">line>
<line x1="12" y1="20" x2="12" y2="4">line>
<line x1="6" y1="20" x2="6" y2="14">line>
svg>
Reports
a>
li>
<li class="nav-item">
<a class="nav-link" href="http://getbootstrap.com/docs/4.0/examples/dashboard/#">
<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-layers">
<polygon points="12 2 2 7 12 12 22 7 12 2">polygon>
<polyline points="2 17 12 22 22 17">polyline>
<polyline points="2 12 12 17 22 12">polyline>
svg>
Integrations
a>
li>
ul>
<h6 class="sidebar-heading d-flex justify-content-between align-items-center px-3 mt-4 mb-1 text-muted">
<span>Saved reportsspan>
<a class="d-flex align-items-center text-muted" href="http://getbootstrap.com/docs/4.0/examples/dashboard/#">
<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-plus-circle"><circle cx="12" cy="12" r="10">circle><line x1="12" y1="8" x2="12" y2="16">line><line x1="8" y1="12" x2="16" y2="12">line>svg>
a>
h6>
<ul class="nav flex-column mb-2">
<li class="nav-item">
<a class="nav-link" href="http://getbootstrap.com/docs/4.0/examples/dashboard/#">
<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-file-text">
<path d="M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z">path>
<polyline points="14 2 14 8 20 8">polyline>
<line x1="16" y1="13" x2="8" y2="13">line>
<line x1="16" y1="17" x2="8" y2="17">line>
<polyline points="10 9 9 9 8 9">polyline>
svg>
Current month
a>
li>
<li class="nav-item">
<a class="nav-link" href="http://getbootstrap.com/docs/4.0/examples/dashboard/#">
<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-file-text">
<path d="M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z">path>
<polyline points="14 2 14 8 20 8">polyline>
<line x1="16" y1="13" x2="8" y2="13">line>
<line x1="16" y1="17" x2="8" y2="17">line>
<polyline points="10 9 9 9 8 9">polyline>
svg>
Last quarter
a>
li>
<li class="nav-item">
<a class="nav-link" href="http://getbootstrap.com/docs/4.0/examples/dashboard/#">
<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-file-text">
<path d="M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z">path>
<polyline points="14 2 14 8 20 8">polyline>
<line x1="16" y1="13" x2="8" y2="13">line>
<line x1="16" y1="17" x2="8" y2="17">line>
<polyline points="10 9 9 9 8 9">polyline>
svg>
Social engagement
a>
li>
<li class="nav-item">
<a class="nav-link" href="http://getbootstrap.com/docs/4.0/examples/dashboard/#">
<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-file-text">
<path d="M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z">path>
<polyline points="14 2 14 8 20 8">polyline>
<line x1="16" y1="13" x2="8" y2="13">line>
<line x1="16" y1="17" x2="8" y2="17">line>
<polyline points="10 9 9 9 8 9">polyline>
svg>
Year-end sale
a>
li>
ul>
div>
nav>
<main role="main" class="col-md-9 ml-sm-auto col-lg-10 pt-3 px-4">
<h2>Section titleh2>
<div class="table-responsive">
<table class="table table-striped table-sm">
<thead>
<tr>
<th>#th>
<th>Headerth>
<th>Headerth>
<th>Headerth>
<th>Headerth>
tr>
thead>
<tbody>
<tr>
<td>1,001td>
<td>Loremtd>
<td>ipsumtd>
<td>dolortd>
<td>sittd>
tr>
<tr>
<td>1,002td>
<td>amettd>
<td>consecteturtd>
<td>adipiscingtd>
<td>elittd>
tr>
<tr>
<td>1,003td>
<td>Integertd>
<td>nectd>
<td>odiotd>
<td>Praesenttd>
tr>
<tr>
<td>1,003td>
<td>liberotd>
<td>Sedtd>
<td>cursustd>
<td>antetd>
tr>
<tr>
<td>1,004td>
<td>dapibustd>
<td>diamtd>
<td>Sedtd>
<td>nisitd>
tr>
<tr>
<td>1,005td>
<td>Nullatd>
<td>quistd>
<td>semtd>
<td>attd>
tr>
<tr>
<td>1,006td>
<td>nibhtd>
<td>elementumtd>
<td>imperdiettd>
<td>Duistd>
tr>
<tr>
<td>1,007td>
<td>sagittistd>
<td>ipsumtd>
<td>Praesenttd>
<td>mauristd>
tr>
<tr>
<td>1,008td>
<td>Fuscetd>
<td>nectd>
<td>tellustd>
<td>sedtd>
tr>
<tr>
<td>1,009td>
<td>auguetd>
<td>sempertd>
<td>portatd>
<td>Mauristd>
tr>
<tr>
<td>1,010td>
<td>massatd>
<td>Vestibulumtd>
<td>laciniatd>
<td>arcutd>
tr>
<tr>
<td>1,011td>
<td>egettd>
<td>nullatd>
<td>Classtd>
<td>aptenttd>
tr>
<tr>
<td>1,012td>
<td>tacititd>
<td>sociosqutd>
<td>adtd>
<td>litoratd>
tr>
<tr>
<td>1,013td>
<td>torquenttd>
<td>pertd>
<td>conubiatd>
<td>nostratd>
tr>
<tr>
<td>1,014td>
<td>pertd>
<td>inceptostd>
<td>himenaeostd>
<td>Curabiturtd>
tr>
<tr>
<td>1,015td>
<td>sodalestd>
<td>ligulatd>
<td>intd>
<td>liberotd>
tr>
tbody>
table>
div>
main>
div>
div>
<script type="text/javascript" src="asserts/js/jquery-3.2.1.slim.min.js">script>
<script type="text/javascript" src="asserts/js/popper.min.js">script>
<script type="text/javascript" src="asserts/js/bootstrap.min.js">script>
<script type="text/javascript" src="asserts/js/feather.min.js">script>
<script>
feather.replace()
script>
<script type="text/javascript" src="asserts/js/Chart.min.js">script>
<script>
var ctx = document.getElementById("myChart");
var myChart = new Chart(ctx, {
type: 'line',
data: {
labels: ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"],
datasets: [{
data: [15339, 21345, 18483, 24003, 23489, 24092, 12034],
lineTension: 0,
backgroundColor: 'transparent',
borderColor: '#007bff',
borderWidth: 4,
pointBackgroundColor: '#007bff'
}]
},
options: {
scales: {
yAxes: [{
ticks: {
beginAtZero: false
}
}]
},
legend: {
display: false,
}
}
});
script>
body>
html>
效果
可以将各个公共区抽取出来
抽取公共部分
操作
1、基本
然后ctrl+F9，就可以看到效果了。
然后ctrl+F9，就可以看到效果了：
2、将刚刚的那些公共部分放到一个公共文件夹下，然后重新引入
理论
1、抽取公共片段
<div th:fragment="copy">
© 2011 The Good Thymes Virtual Grocery
div>
2、引入公共片段
<div th:insert="~{footer :: copy}">div>
~{templatename::selector}：模板名::选择器
~{templatename::fragmentname}:模板名::片段名
3、默认效果：
insert的公共片段在div标签中
如果使用th:insert等属性进行引入，可以不用写~{}：
行内写法可以加上：[[~{}]];[(~{})]；
三种引入公共片段的th属性：
- th:insert：将公共片段整个插入到声明引入的元素中
- th:replace：将声明引入的元素替换为公共片段
- th:include：将被引入的片段的内容包含进这个标签中
<footer th:fragment="copy">
© 2011 The Good Thymes Virtual Grocery
footer>
引入方式
<div th:insert="footer :: copy">div>
<div th:replace="footer :: copy">div>
<div th:include="footer :: copy">div>
效果
<div>
<footer>
© 2011 The Good Thymes Virtual Grocery
footer>
div>
<footer>
© 2011 The Good Thymes Virtual Grocery
footer>
<div>
© 2011 The Good Thymes Virtual Grocery
div>
dao层编写
1、bean
package com.oceanstar.entities;
public class Department {
private Integer id;
private String departmentName;
public Department() {
}
public Department(int i, String string) {
this.id = i;
this.departmentName = string;
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getDepartmentName() {
return departmentName;
}
public void setDepartmentName(String departmentName) {
this.departmentName = departmentName;
}
@Override
public String toString() {
return "Department [id=" + id + ", departmentName=" + departmentName + "]";
}
}
package com.oceanstar.entities;
import java.util.Date;
public class Employee {
private Integer id;
private String lastName;
private String email;
//1 male, 0 female
private Integer gender;
private Department department;
private Date birth;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public Integer getGender() {
return gender;
}
public void setGender(Integer gender) {
this.gender = gender;
}
public Department getDepartment() {
return department;
}
public void setDepartment(Department department) {
this.department = department;
}
public Date getBirth() {
return birth;
}
public void setBirth(Date birth) {
this.birth = birth;
}
public Employee(Integer id, String lastName, String email, Integer gender,
Department department) {
super();
this.id = id;
this.lastName = lastName;
this.email = email;
this.gender = gender;
this.department = department;
this.birth = new Date();
}
public Employee() {
}
@Override
public String toString() {
return "Employee{" +
"id=" + id +
", lastName='" + lastName + '\'' +
", email='" + email + '\'' +
", gender=" + gender +
", department=" + department +
", birth=" + birth +
'}';
}
}
2、dao
package com.oceanstar.dao;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import com.oceanstar.entities.Department;
import org.springframework.stereotype.Repository;
@Repository
public class DepartmentDao {
private static Map<Integer, Department> departments = null;
static{
departments = new HashMap<Integer, Department>();
departments.put(101, new Department(101, "D-AA"));
departments.put(102, new Department(102, "D-BB"));
departments.put(103, new Department(103, "D-CC"));
departments.put(104, new Department(104, "D-DD"));
departments.put(105, new Department(105, "D-EE"));
}
public Collection<Department> getDepartments(){
return departments.values();
}
public Department getDepartment(Integer id){
return departments.get(id);
}
}
package com.oceanstar.dao;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import com.oceanstar.entities.Employee;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;
@Repository
public class EmployeeDao {
private static Map<Integer, Employee> employees = null;
@Autowired
private DepartmentDao departmentDao;
static{
employees = new HashMap<Integer, Employee>();
employees.put(1001, new Employee(1001, "E-AA", "[email protected]", 1, new Department(101, "D-AA")));
employees.put(1002, new Employee(1002, "E-BB", "[email protected]", 1, new Department(102, "D-BB")));
employees.put(1003, new Employee(1003, "E-CC", "[email protected]", 0, new Department(103, "D-CC")));
employees.put(1004, new Employee(1004, "E-DD", "[email protected]", 0, new Department(104, "D-DD")));
employees.put(1005, new Employee(1005, "E-EE", "[email protected]", 1, new Department(105, "D-EE")));
}
private static Integer initId = 1006;
public void save(Employee employee){
if(employee.getId() == null){
employee.setId(initId++);
}
employee.setDepartment(departmentDao.getDepartment(employee.getDepartment().getId()));
employees.put(employee.getId(), employee);
}
public Collection<Employee> getAll(){
return employees.values();
}
public Employee get(Integer id){
return employees.get(id);
}
public void delete(Integer id){
employees.remove(id);
}
}
编写控制层
修改list页面
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<meta name="description" content="">
<meta name="author" content="">
<title>Dashboard Template for Bootstraptitle>
<link href="asserts/css/bootstrap.min.css" rel="stylesheet">
<link href="asserts/css/dashboard.css" rel="stylesheet">
<style type="text/css">
/* Chart.js */
@-webkit-keyframes chartjs-render-animation {
from {
opacity: 0.99
}
to {
opacity: 1
}
}
@keyframes chartjs-render-animation {
from {
opacity: 0.99
}
to {
opacity: 1
}
}
.chartjs-render-monitor {
-webkit-animation: chartjs-render-animation 0.001s;
animation: chartjs-render-animation 0.001s;
}
style>
head>
<body>
<div th:replace="~{commons/bar::topbar}">div>
<div class="container-fluid">
<div class="row">
<div th:replace="~{commons/bar::#sidebar}">div>
<main role="main" class="col-md-9 ml-sm-auto col-lg-10 pt-3 px-4">
<h2><a class="btn btn-sm btn-success" href="emp" th:href="@{/emp}">员工添加a>h2>
<div class="table-responsive">
<table class="table table-striped table-sm">
<thead>
<tr>
<th>#th>
<th>lastNameth>
<th>emailth>
<th>genderth>
<th>departmentth>
<th>birthth>
<th>操作th>
tr>
thead>
<tbody>
<tr th:each="emp:${emps}">
<td th:text="${emp.id}">td>
<td>[[${emp.lastName}]]td>
<td th:text="${emp.email}">td>
<td th:text="${emp.gender}==0?'女':'男'">td>
<td th:text="${emp.department.departmentName}">td>
<td th:text="${#dates.format(emp.birth, 'yyyy-MM-dd HH:mm')}">td>
<td>
<a class="btn btn-sm btn-primary" th:href="@{/emp/}+${emp.id}">编辑a>
<button th:attr="del_uri=@{/emp/}+${emp.id}" class="btn btn-sm btn-danger deleteBtn">删除
button>
td>
tr>
tbody>
table>
div>
main>
div>
div>
<script type="text/javascript" src="asserts/js/jquery-3.2.1.slim.min.js">script>
<script type="text/javascript" src="asserts/js/popper.min.js">script>
<script type="text/javascript" src="asserts/js/bootstrap.min.js">script>
<script type="text/javascript" src="asserts/js/feather.min.js">script>
<script>
feather.replace()
script>
<script type="text/javascript" src="asserts/js/Chart.min.js">script>
<script>
var ctx = document.getElementById("myChart");
var myChart = new Chart(ctx, {
type: 'line',
data: {
labels: ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"],
datasets: [{
data: [15339, 21345, 18483, 24003, 23489, 24092, 12034],
lineTension: 0,
backgroundColor: 'transparent',
borderColor: '#007bff',
borderWidth: 4,
pointBackgroundColor: '#007bff'
}]
},
options: {
scales: {
yAxes: [{
ticks: {
beginAtZero: false
}
}]
},
legend: {
display: false,
}
}
});
script>
body>
html>