SpringMVC-RestFul案例

前提： 1.准备实体类:

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() {
    }
}

2.准备dao模拟数据

@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);
    }
}

案例功能：

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

具体功能

1.访问首页

配置view-controller

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

创建页面
```
<!DOCTYPE html>
```

访问员工信息 ```

查询所有员工数据

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";
}

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>

```

删除

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>

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>

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";
}

执行保存

控制器方法:

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

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