項目結構
jar包
配置文件
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd">
<!-- 開啟注解掃描 -->
<context:component-scan base-package="com.xxjqr"></context:component-scan>
<!-- 配置視圖轉發(fā)器 -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/views/"></property>
<property name="suffix" value=".jsp"></property>
</bean>
<!-- 處理靜態(tài)資源請求 -->
<mvc:default-servlet-handler />
<!-- 使用了上面的標簽后還是需要使用該標簽來開啟非靜態(tài)資源請求的攔截 -->
<mvc:annotation-driven></mvc:annotation-driven>
</beans>
前端頁面
//index.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!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>
<a href="list">show all employees</a>
</body>
</html>
//list.jsp
<%@ page language="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>
<!-- 靜態(tài)資源請求的問題
http://www.cnblogs.com/fangqi/archive/2012/10/28/2743108.html
-->
<script type="text/javascript" src="scripts/jquery-3.0.0.min.js"></script>
<script type="text/javascript">
$(function(){
$(".delete").click(function(){
var href = $(this).attr("href");
$("form").attr("action", href).submit();
return false;
});
})
</script>
</head>
<body>
<!-- 該form是用來給delete操作做占位用的 -->
<form action="" method="post">
<input type="hidden" name="_method" value="DELETE"/>
</form>
<c:if test="${empty requestScope.emps}">
目前沒有任何員工信息
</c:if>
<c:if test="${!empty requestScope.emps}">
<table border="1" cellpadding="10" cellspacing="0">
<tr>
<th>ID</th>
<th>Name</th>
<th>Email</th>
<th>Gender</th>
<th>Department</th>
<th>Edit</th>
<th>Delete</th>
</tr>
<c:forEach items="${requestScope.emps}" var="emp">
<tr>
<td>${emp.empId}</td>
<td>${emp.empName}</td>
<td>${emp.empEmail}</td>
<td>${emp.empGender==0?'Female':'Male'}</td>
<td>${emp.department.deptName}</td>
<td><a href="emp/${emp.empId}">Edit</a></td>
<td><a class="delete" href="emp/${emp.empId}">Delete</a></td>
</tr>
</c:forEach>
</table>
</c:if>
<br>
<a href="emp">Add employee</a>
</body>
</html>
//input.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<form:form action="${pageContext.request.contextPath}/emp" method="post" modelAttribute="employee">
<c:if test="${!empty employee.empId}">
<form:hidden path="empId"/><!-- id要設成隱藏域注入javabean，否則javabean的id屬性為Null -->
<input type="hidden" name="_method" value="PUT"/>
</c:if>
name：<form:input path="empName"/><br>
email：<form:input path="empEmail"/><br>
gender：
<form:radiobuttons path="empGender" items="${genders}"/><br>
<!-- items是顯示的數(shù)據(jù)源(map類型)
提交表單后注入的是map的key值 -->
department：
<form:select path="department.deptId" items="${depts}" itemLabel="deptName" itemValue="deptId"></form:select>
<!--
因為提交表單時不能直接返回一個對象類型，那么這里我們不能直接注入employee的department屬性
所以我們可以用級聯(lián)特性注入department屬性的id屬性值
itemLabel：列表顯示出來的內容 (deptName是Map中對象類型中的屬性)
itemValue：列表顯示內容選中后對應的value值 (deptName也是Map中對象類型中的屬性);
注意：要使用itemLabel，itemValue屬性，那么數(shù)據(jù)源必須是Collection或Array類型
-->
<br><button type="submit">提交</button>
</form:form>
<!-- spring form標簽
form標簽默認需要綁定一個javabean對象湾盗，默認bean名稱是"command"
通常我們都會指定commandName或modelAttribute 屬性，來指定使用綁定到的JavaBean的名稱
綁定的javabean對象是必須存在于model中的哦，這里綁定的javabean名稱是model中的attibuteName
-->
</body>
</html>
handlers包
@Controller
public class EmployeeHandler {
@Autowired
private EmployeeDao employeeDao;
@Autowired
private DepartmentDao departmentDao;
@RequestMapping(value="/list")
public String list(Map<String,Object> map){
map.put("emps",employeeDao.getAll());
return "list";
}
//點擊Add employee 鏈接會進來
@RequestMapping(value={"/emp"},method=RequestMethod.GET)
public String input(Map<String,Object> map){
//springmvc表單標簽 性別單選選項數(shù)據(jù)源
Map<Integer,String> genders = new HashMap<Integer,String>();
genders.put(0, "Female");
genders.put(1, "Male");
map.put("genders", genders);
map.put("employee",new Employee());//springmvc的表單標簽 對應bean
map.put("depts", departmentDao.getAll());//springmvc表單標簽 部門數(shù)據(jù)源
return "input";
}
/**添加Employee*/
@RequestMapping(value="/emp",method=RequestMethod.POST)
public String save(Employee employee){
System.out.println(employee);
employeeDao.save(employee);
return "redirect:list";
}
/**刪除指定id的Employee*/
@RequestMapping(value="/emp/{id}",method=RequestMethod.DELETE)
public String delete(@PathVariable("id") Integer id){
employeeDao.delete(id);
return "redirect:/list";
}
/*點擊Edit會進來*/
@RequestMapping(value="/emp/{id}",method=RequestMethod.GET)
public String input(
@PathVariable("id") Integer id
,Map<String,Object> map){
//springmvc表單標簽 性別單選選項數(shù)據(jù)源
Map<Integer,String> genders = new HashMap<Integer,String>();
genders.put(0, "Female");
genders.put(1, "Male");
map.put("genders", genders);
map.put("depts", departmentDao.getAll());//springmvc表單標簽 部門數(shù)據(jù)源
map.put("employee",employeeDao.getEmployee(id));//springmvc的表單標簽 對應bean
//model中放入employee bean,前端表單有會有回顯
return "input";
}
/**更新操作*/
@RequestMapping(value="/emp",method=RequestMethod.PUT)
public String update(Employee employee){
System.out.println(employee);
employeeDao.save(employee);
return "redirect:/list";
}
}
dao包
package com.xxjqr.dao;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import org.springframework.stereotype.Repository;
import com.xxjqr.entities.Department;
@Repository
public class DepartmentDao {
private static Map<Integer,Department> depts;
static {
depts = new HashMap<Integer,Department>();
depts.put(101, new Department(101,"開發(fā)部"));
depts.put(102, new Department(102,"宣傳部"));
depts.put(103, new Department(103,"銷售部"));
depts.put(104, new Department(104,"研發(fā)部"));
depts.put(105, new Department(105,"賬務部"));
}
public Collection<Department> getAll(){
return depts.values();
}
public Department getDepartment(Integer id){
return depts.get(id);
}
}
package com.xxjqr.dao;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;
import com.xxjqr.entities.Department;
import com.xxjqr.entities.Employee;
@Repository
public class EmployeeDao {
private static Map<Integer,Employee> emps;
private static Integer empId = 1006;
@Autowired
private DepartmentDao deptDao;
static {
emps = new HashMap<Integer,Employee>();
emps.put(1001, new Employee(1001,"Smith","11@qq.com",1,new Department(101,"開發(fā)部")));
emps.put(1002, new Employee(1002,"Johnson","22@qq.com",0,new Department(102,"宣傳部")));
emps.put(1003, new Employee(1003,"Williams","33@qq.com",0,new Department(103,"銷售部")));
emps.put(1004, new Employee(1004,"Brown","44@qq.com",1,new Department(104,"研發(fā)部")));
emps.put(1005, new Employee(1005,"Jones","55@qq.com",0,new Department(105,"賬務部")));
}
public Collection<Employee> getAll(){
return emps.values();
}
public void save(Employee employee){
if (employee.getEmpId() == null){
employee.setEmpId(empId++);
}
employee.setDepartment(deptDao.getDepartment(employee.getDepartment().getDeptId()));
emps.put(employee.getEmpId(), employee);
}
public void delete(Integer id){
if(id != null){
emps.remove(id);
}
}
public Employee getEmployee(Integer id){
if (id !=null)
return emps.get(id);
return null;
}
}
entities包
@Data
@AllArgsConstructor
@NoArgsConstructor
public class Department {
private Integer deptId;
private String deptName;
}
@Data
@AllArgsConstructor
@NoArgsConstructor
@RequiredArgsConstructor
public class Employee {
private Integer empId;
@NonNull
private String empName;
@NonNull
private String empEmail;
@NonNull
private Integer empGender;//0女,1男
@NonNull
private Department department;
}
演示：
