SpringMVC使用restful实现员工数据的新增

2025-04-20 14:53:38

1、在list.jsp页面中增加一个新增链接：<%@ page language屏顿幂垂="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%><%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>Insert title here</title></head><body> <form action="" method="POST"> <input type="hidden" name="_method" value="DELETE"/> </form> <c:if test="${empty requestScope.employees }"> 没有任何员工信息. </c:if> <c:if test="${!empty requestScope.employees }"> <table border="1" cellpadding="10" cellspacing="0"> <tr> <th>ID</th> <th>LastName</th> <th>Email</th> <th>Gender</th> <th>Department</th> <th>Edit</th> <th>Delete</th> </tr> <c:forEach items="${requestScope.employees }" var="emp"> <tr> <td>${emp.id }</td> <td>${emp.lastName }</td> <td>${emp.email }</td> <td>${emp.gender == 0 ? 'Female' : 'Male' }</td> <td>${emp.department.departmentName }</td> <td><a href="emp/${emp.id}">Edit</a></td> <td><a class="delete" href="emp/${emp.id}">Delete</a></td> </tr> </c:forEach> </table> </c:if> <br><br> <a href="emp">Add New Employee</a> </body></html>

2、在控制层实现新增请求的跳转。package com.gwolf.springmvc.handlers;import java.util.Map;import javax.validation.Valid;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Controller;import org.springframework.validation.Errors;import org.springframework.validation.FieldError;import org.springframework.web.bind.annotation.ModelAttribute;import org.springframework.web.bind.annotation.PathVariable;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestMethod;import org.springframework.web.bind.annotation.RequestParam;import com.gwolf.springmvc.dao.DepartmentDao;import com.gwolf.springmvc.dao.EmployeeDao;import com.gwolf.springmvc.domain.Employee;@Controllerpublic class EmployeeHandler { @Autowired private EmployeeDao employeeDao; @Autowired private DepartmentDao departmentDao; @RequestMapping(value="/emp", method=RequestMethod.GET) public String input(Map<String, Object> map){ map.put("departments", departmentDao.getDepartments()); map.put("employee", new Employee()); return "input"; } @RequestMapping("/emps") public String list(Map<String, Object> map){ map.put("employees", employeeDao.getAll()); return "list"; } }

3、使用Spring的form标签实现表单数据，这样可以更快速的开发出表单页面, 而且可以更方便的进行表单值的回显；<%@page import="java.util.Has茑霁酌绡hMap"%><%@page import="java.util.Map"%><%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%><%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %><%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>Insert title here</title></head><body>  <form:form action="${pageContext.request.contextPath }/emp" method="POST" modelAttribute="employee"> <br> LastName: <form:input path="lastName"/> <br> Email: <form:input path="email"/> <br> <% Map<String, String> genders = new HashMap(); genders.put("1", "Male"); genders.put("0", "Female"); request.setAttribute("genders", genders); %> Gender: <br> <form:radiobuttons path="gender" items="${genders }" delimiter="<br>"/> <br> Department: <form:select path="department.id" items="${departments }" itemLabel="departmentName" itemValue="id"></form:select> <br> Birth: <form:input path="birth"/> <br> Salary: <form:input path="salary"/> <br> <input type="submit" value="Submit"/> </form:form> </body></html>

4、启动tomcat服务器，查看jsp页面的显示效果：

5、在springmvc中实现表单保存的方法实现。package com.gwolf.springmvc.handlers;import java.util.Map;import javax.validation.Valid;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Controller;import org.springframework.validation.Errors;import org.springframework.validation.FieldError;import org.springframework.web.bind.annotation.ModelAttribute;import org.springframework.web.bind.annotation.PathVariable;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestMethod;import org.springframework.web.bind.annotation.RequestParam;import com.gwolf.springmvc.dao.DepartmentDao;import com.gwolf.springmvc.dao.EmployeeDao;import com.gwolf.springmvc.domain.Employee;@Controllerpublic class EmployeeHandler { @Autowired private EmployeeDao employeeDao; @Autowired private DepartmentDao departmentDao; @RequestMapping(value="/emp", method=RequestMethod.POST) public String save(@Valid Employee employee, Errors result, Map<String, Object> map){ System.out.println("save: " + employee); employeeDao.save(employee); return "redirect:/emps"; } @RequestMapping(value="/emp", method=RequestMethod.GET) public String input(Map<String, Object> map){ map.put("departments", departmentDao.getDepartments()); map.put("employee", new Employee()); return "input"; } @RequestMapping("/emps") public String list(Map<String, Object> map){ map.put("employees", employeeDao.getAll()); return "list"; } }

6、在jsp页面中提交表单，查看数据是否能够正常保存。

7、数据成功保存并且跳转到列表页面显示

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