RESTful案例

ゞ浴缸里的玫瑰 2024-04-01 18:56 69阅读 0赞

**目录**

1、准备工作

2、功能清单

3、具体功能：访问首页

4、具体功能：查询所有员工数据

5、具体功能：删除

6、具体功能：跳转到添加数据页面

7、具体功能：执行保存

8、具体功能：跳转到更新数据页面

9、具体功能：执行更新

--------------------

1、准备工作

和传统 CRUD 一样，实现对员工信息的增删改查。

*  搭建环境
 *  准备实体类

package com.atguigu.mvc.bean;
    
    public class Employee {
    
       private Integer id;
       private String lastName;
    
       private String email;
       //1 male, 0 female
       private Integer gender;
       
       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 Employee(Integer id, String lastName, String email, Integer gender) {
          super();
          this.id = id;
          this.lastName = lastName;
          this.email = email;
          this.gender = gender;
       }
    
       public Employee() {
       }
    }

*  准备dao模拟数据

package com.atguigu.mvc.dao;
    
    import java.util.Collection;
    import java.util.HashMap;
    import java.util.Map;
    
    import com.atguigu.mvc.bean.Employee;
    import org.springframework.stereotype.Repository;
    
    
    @Repository
    public class EmployeeDao {
    
       private static Map<Integer, Employee> employees = null;
       
       static{
          employees = new HashMap<Integer, Employee>();
    
          employees.put(1001, new Employee(1001, "E-AA", "aa@163.com", 1));
          employees.put(1002, new Employee(1002, "E-BB", "bb@163.com", 1));
          employees.put(1003, new Employee(1003, "E-CC", "cc@163.com", 0));
          employees.put(1004, new Employee(1004, "E-DD", "dd@163.com", 0));
          employees.put(1005, new Employee(1005, "E-EE", "ee@163.com", 1));
       }
       
       private static Integer initId = 1006;
       
       public void save(Employee employee){
          if(employee.getId() == null){
             employee.setId(initId++);
          }
          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);
       }
    }

#### 2、功能清单 ####

<table style="width:500px;"> 
 <tbody> 
  <tr> 
   <th>功能</th> 
   <th>URL 地址</th> 
   <th>请求方式</th> 
  </tr> 
  <tr> 
   <td>访问首页√</td> 
   <td>/</td> 
   <td>GET</td> 
  </tr> 
  <tr> 
   <td>查询全部数据√</td> 
   <td>/employee</td> 
   <td>GET</td> 
  </tr> 
  <tr> 
   <td>删除√</td> 
   <td>/employee/2</td> 
   <td>DELETE</td> 
  </tr> 
  <tr> 
   <td>跳转到添加数据页面√</td> 
   <td>/toAdd</td> 
   <td>GET</td> 
  </tr> 
  <tr> 
   <td>执行保存√</td> 
   <td>/employee</td> 
   <td>POST</td> 
  </tr> 
  <tr> 
   <td>跳转到更新数据页面√</td> 
   <td>/employee/2</td> 
   <td>GET</td> 
  </tr> 
  <tr> 
   <td>执行更新√</td> 
   <td>/employee</td> 
   <td>PUT</td> 
  </tr> 
 </tbody> 
</table>

#### 3、具体功能：访问首页 ####

a>配置view-controller

<mvc:view-controller path="/" view-name="index"/>

b>创建页面

<!DOCTYPE html>
    <html lang="en" xmlns:th="http://www.thymeleaf.org">
    <head>
        <meta charset="UTF-8" >
        <title>Title</title>
    </head>
    <body>
    <h1>首页</h1>
    <a th:href="@{/employee}">访问员工信息</a>
    </body>
    </html>

#### 4、具体功能：查询所有员工数据 ####

a>控制器方法

@RequestMapping(value = "/employee", method = RequestMethod.GET)
    public String getEmployeeList(Model model){
        Collection<Employee> employeeList = employeeDao.getAll();
        model.addAttribute("employeeList", employeeList);
        return "employee_list";
    }

b>创建employee\_list.html

<!DOCTYPE html>
    <html lang="en" xmlns:th="http://www.thymeleaf.org">
    <head>
        <meta charset="UTF-8">
        <title>Employee Info</title>
        <script type="text/javascript" th:src="@{/static/js/vue.js}"></script>
    </head>
    <body>
    
        <table border="1" cellpadding="0" cellspacing="0" style="text-align: center;" id="dataTable">
            <tr>
                <th colspan="5">Employee Info</th>
            </tr>
            <tr>
                <th>id</th>
                <th>lastName</th>
                <th>email</th>
                <th>gender</th>
                <th>options(<a th:href="@{/toAdd}">add</a>)</th>
            </tr>
            <tr th:each="employee : ${employeeList}">
                <td th:text="${employee.id}"></td>
                <td th:text="${employee.lastName}"></td>
                <td th:text="${employee.email}"></td>
                <td th:text="${employee.gender}"></td>
                <td>
                    <a class="deleteA" @click="deleteEmployee" th:href="@{'/employee/'+${employee.id}}">delete</a>
                    <a th:href="@{'/employee/'+${employee.id}}">update</a>
                </td>
            </tr>
        </table>
    </body>
    </html>

#### 5、具体功能：删除 ####

a>创建处理delete请求方式的表单

<form id="delete_form" method="post">
        
        <input type="hidden" name="_method" value="delete"/>
    </form>

b>删除超链接绑定点击事件

引入vue.js

删除超链接

<a class="deleteA" @click="deleteEmployee" th:href="@{'/employee/'+${employee.id}}">delete</a>

通过vue处理点击事件

c>控制器方法

@RequestMapping(value = "/employee/{id}", method = RequestMethod.DELETE)
    public String deleteEmployee(@PathVariable("id") Integer id){
        employeeDao.delete(id);
        return "redirect:/employee";
    }

#### 6、具体功能：跳转到添加数据页面 ####

a>配置view-controller

<mvc:view-controller path="/toAdd" view-name="employee_add"></mvc:view-controller>

b>创建employee\_add.html

<!DOCTYPE html>
    <html lang="en" xmlns:th="http://www.thymeleaf.org">
    <head>
        <meta charset="UTF-8">
        <title>Add Employee</title>
    </head>
    <body>
    
    <form th:action="@{/employee}" method="post">
        lastName:<input type="text" name="lastName"><br>
        email:<input type="text" name="email"><br>
        gender:<input type="radio" name="gender" value="1">male
        <input type="radio" name="gender" value="0">female<br>
        <input type="submit" value="add"><br>
    </form>
    
    </body>
    </html>

#### 7、具体功能：执行保存 ####

a>控制器方法

@RequestMapping(value = "/employee", method = RequestMethod.POST)
    public String addEmployee(Employee employee){
        employeeDao.save(employee);
        return "redirect:/employee";
    }

#### 8、具体功能：跳转到更新数据页面 ####

a>修改超链接

<a th:href="@{'/employee/'+${employee.id}}">update</a>

b>控制器方法

@RequestMapping(value = "/employee/{id}", method = RequestMethod.GET)
    public String getEmployeeById(@PathVariable("id") Integer id, Model model){
        Employee employee = employeeDao.get(id);
        model.addAttribute("employee", employee);
        return "employee_update";
    }

c>创建employee\_update.html

<!DOCTYPE html>
    <html lang="en" xmlns:th="http://www.thymeleaf.org">
    <head>
        <meta charset="UTF-8">
        <title>Update Employee</title>
    </head>
    <body>
    
    <form th:action="@{/employee}" method="post">
        <input type="hidden" name="_method" value="put">
        <input type="hidden" name="id" th:value="${employee.id}">
        lastName:<input type="text" name="lastName" th:value="${employee.lastName}"><br>
        email:<input type="text" name="email" th:value="${employee.email}"><br>
        
        gender:<input type="radio" name="gender" value="1" th:field="${employee.gender}">male
        <input type="radio" name="gender" value="0" th:field="${employee.gender}">female<br>
        <input type="submit" value="update"><br>
    </form>
    
    </body>
    </html>

#### 9、具体功能：执行更新 ####

a>控制器方法

@RequestMapping(value = "/employee", method = RequestMethod.PUT)
    public String updateEmployee(Employee employee){
        employeeDao.save(employee);
        return "redirect:/employee";
    }