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SpringMVC RESTful案例

news 来源：原创 2024/5/9 8:47:32

文章目录

- - 1、准备工作
  - 2、功能清单
  - 3、具体功能：访问首页
  - - - a>配置view-controller
      - b>创建页面
  - 4、具体功能：查询所有员工数据
  - - - a>控制器方法
      - b>创建employee_list.html
  - 5、具体功能：删除
  - - - a>创建处理delete请求方式的表单
      - b>删除超链接绑定点击事件
      - c>控制器方法
  - 6、具体功能：跳转到添加数据页面
  - - - a>配置view-controller
      - b>创建employee_add.html
  - 7、具体功能：执行保存
  - - - a>控制器方法
  - 8、具体功能：跳转到更新数据页面
  - - - a>修改超链接
      - b>控制器方法
      - c>创建employee_update.html
  - 9、具体功能：执行更新
  - - - a>控制器方法

在这里插入图片描述

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 femaleprivate 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

功能	URL 地址	请求方式
访问首页√	/	GET
查询全部数据√	/employee	GET
删除√	/employee/2	DELETE
跳转到添加数据页面√	/toAdd	GET
执行保存√	/employee	POST
跳转到更新数据页面√	/employee/2	GET
执行更新√	/employee	PUT

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

<!-- 作用：通过超链接控制表单的提交，将post请求转换为delete请求 -->
<form id="delete_form" method="post"><!-- HiddenHttpMethodFilter要求：必须传输_method请求参数，并且值为最终的请求方式 --><input type="hidden" name="_method" value="delete"/>
</form>

b>删除超链接绑定点击事件

引入vue.js

<script type="text/javascript" th:src="@{/static/js/vue.js}"></script>

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

<script type="text/javascript">var vue = new Vue({el:"#dataTable",methods:{//event表示当前事件deleteEmployee:function (event) {//通过id获取表单标签var delete_form = document.getElementById("delete_form");//将触发事件的超链接的href属性为表单的action属性赋值delete_form.action = event.target.href;//提交表单delete_form.submit();//阻止超链接的默认跳转行为event.preventDefault();}}});
</script>

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="${employee.email}"><br><!--th:field="${employee.gender}"可用于单选框或复选框的回显若单选框的value和employee.gender的值一致，则添加checked="checked"属性-->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";
}