目录
相关准备
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
public class Employee { private Integer id; private String lastName; private String email; //1 male, 0 female private Integer gender; //getter,setter,有参无参 } - 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); } } 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 |
具体功能：访问首页
①配置view-controller
<mvc:view-controller path="/" view-name="index"/> ②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> 具体功能：查询所有员工数据
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/'+${employee.id}}">update</a> </td> </tr> </table> </body> </html> 具体功能：删除
①创建处理delete请求方式的表单
<!-- 作用：通过超链接控制表单的提交，将post请求转换为delete请求 --> <form id="delete_form" method="post"> <!-- HiddenHttpMethodFilter要求：必须传输_method请求参数，并且值为最终的请求方式 --> <input type="hidden" name="_method" value="delete"/> </form> 引入vue.js
<script type="text/javascript" th:src="@{/static/js/vue.js}"></script> 删除超链接
<a class="deleteA" @click="deleteEmployee"th:href="@{'/employee/'+${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> 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"; } 具体功能：跳转到添加数据页面
①配置view-controller
<mvc:view-controller path="/toAdd" view-name="employee_add"></mvc:view-controller> ②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> 具体功能：执行保存
①控制器方法
@RequestMapping(value = "/employee", method = RequestMethod.POST) public String addEmployee(Employee employee){ employeeDao.save(employee); return "redirect:/employee"; } 具体功能：跳转到更新数据页面
①修改超链接
<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> 具体功能：执行更新
控制器方法
@RequestMapping(value = "/employee", method = RequestMethod.PUT) public String updateEmployee(Employee employee){ employeeDao.save(employee); return "redirect:/employee"; } 欢迎关注公众号：愚生浅末。
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