SpringMVC:RESTful案例
2023-02-26 06:01:02
目錄
相關準備
和傳統 CRUD 一樣，實現對員工資訊的增刪改查。
- 搭建環境
- 準備實體類
public class Employee {
private Integer id;
private String lastName;
private String email;
//1 male, 0 female
private Integer gender;
//getter,setter,有參無參
}
- 準備dao模擬資料
@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", "[email protected]", 1));
employees.put(1002, new Employee(1002, "E-BB", "[email protected]", 1));
employees.put(1003, new Employee(1003, "E-CC", "[email protected]", 0));
employees.put(1004, new Employee(1004, "E-DD", "[email protected]", 0));
employees.put(1005, new Employee(1005, "E-EE", "[email protected]", 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);
}
}
功能清單
| 功能 | URL 地址 | 請求方式 |
|---|---|---|
| 存取首頁√ | / | GET |
| 查詢全部資料√ | /employee | GET |
| 刪除√ | /employee/2 | DELETE |
| 跳轉到新增資料頁面√ | /toAdd | GET |
| 執行儲存√ | /employee | POST |
| 跳轉到更新資料頁面√ | /employee/2 | GET |
| 執行更新√ | /employee | PUT |
具體功能：存取首頁
①設定view-controller
<mvc:view-controller path="/" view-name="index"/>
②建立頁面
<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8" >
<title>Title</title>
</head>
<body>
<h1>首頁</h1>
<a th:href="@{/employee}">存取員工資訊</a>
</body>
</html>
具體功能：查詢所有員工資料
①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";
}
②建立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/'+${employee.id}}">update</a>
</td>
</tr>
</table>
</body>
</html>
具體功能：刪除
①建立處理delete請求方式的表單
<!-- 作用：通過超連結控制表單的提交，將post請求轉換為delete請求 -->
<form id="delete_form" method="post">
<!-- HiddenHttpMethodFilter要求：必須傳輸_method請求引數，並且值為最終的請求方式 -->
<input type="hidden" name="_method" value="delete"/>
</form>
引入vue.js
<script type="text/javascript" th:src="@{/static/js/vue.js}"></script>
刪除超連結
<a class="deleteA" @click="deleteEmployee"th:href="@{'/employee/'+${employee.id}}">delete</a>
通過vue處理點選事件
<script type="text/javascript">
var vue = new Vue({
el:"#dataTable",
methods:{
//event表示當前事件
deleteEmployee:function (event) {
//通過id獲取表單標籤
var delete_form = document.getElementById("delete_form");
//將觸發事件的超連結的href屬性為表單的action屬性賦值
delete_form.action = event.target.href;
//提交表單
delete_form.submit();
//阻止超連結的預設跳轉行為
event.preventDefault();
}
}
});
</script>
③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";
}
具體功能：跳轉到新增資料頁面
①設定view-controller
<mvc:view-controller path="/toAdd" view-name="employee_add"></mvc:view-controller>
②建立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>
具體功能：執行儲存
①控制器方法
@RequestMapping(value = "/employee", method = RequestMethod.POST)
public String addEmployee(Employee employee){
employeeDao.save(employee);
return "redirect:/employee";
}
具體功能：跳轉到更新資料頁面
①修改超連結
<a th:href="@{'/employee/'+${employee.id}}">update</a>
②控制器方法
@RequestMapping(value = "/employee/{id}", method = RequestMethod.GET)
public String getEmployeeById(@PathVariable("id") Integer id, Model model){
Employee employee = employeeDao.get(id);
model.addAttribute("employee", employee);
return "employee_update";
}
③建立employee_update.html
<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>Update Employee</title>
</head>
<body>
<form th:action="@{/employee}" method="post">
<input type="hidden" name="_method" value="put">
<input type="hidden" name="id" th:value="${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="${employee.gender}"可用於單選框或核取方塊的回顯
若單選框的value和employee.gender的值一致，則新增checked="checked"屬性
-->
gender:<input type="radio" name="gender" value="1"th:field="${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>
具體功能：執行更新
控制器方法
@RequestMapping(value = "/employee", method = RequestMethod.PUT)
public String updateEmployee(Employee employee){
employeeDao.save(employee);
return "redirect:/employee";
}
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