有两POJO类
Address.java
1 package com.proc; 2 3 public class Address { 4 5 private String province; 6 private String city; 7 public String getProvince() { 8 return province; 9 } 10 public void setProvince(String province) { 11 this.province = province; 12 } 13 public String getCity() { 14 return city; 15 } 16 public void setCity(String city) { 17 this.city = city; 18 } 19 @Override 20 public String toString() { 21 return "Address [province=" + province + ", city=" + city + "]"; 22 } 23 }
User.java
1 package com.proc; 2 3 public class User { 4 5 private String username; 6 private String password; 7 private String gender; 8 private String hobby; 9 private Address address; 10 public String getUsername() { 11 return username; 12 } 13 public void setUsername(String username) { 14 this.username = username; 15 } 16 public String getPassword() { 17 return password; 18 } 19 public void setPassword(String password) { 20 this.password = password; 21 } 22 public String getGender() { 23 return gender; 24 } 25 public void setGender(String gender) { 26 this.gender = gender; 27 } 28 public String getHobby() { 29 return hobby; 30 } 31 public void setHobby(String hobby) { 32 this.hobby = hobby; 33 } 34 public Address getAddress() { 35 return address; 36 } 37 public void setAddress(Address address) { 38 this.address = address; 39 } 40 @Override 41 public String toString() { 42 return "User [username=" + username + ", password=" + password 43 + ", gender=" + gender + ", hobby=" + hobby + ", address=" 44 + address + "]"; 45 } 46 }
JSP页面
1 <%@ page language="java" import="java.util.*" pageEncoding="utf-8" contentType="text/html; charset=utf-8"%> 2 3 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 4 <html> 5 <head> 6 7 </head> 8 9 <body> 10 <form action="testPOJO" method="post"> 11 <table> 12 <tr> 13 <td>用户名:</td><td><input type="text" name="username"/></td> 14 </tr> 15 <tr> 16 <td>密码:</td><td><input type="password" name="password"/></td> 17 </tr> 18 <tr> 19 <td>性别:</td> 20 <td> 21 <input type="radio" checked="checked" name="gender" value="male"/>男 22 <input type="radio" name="gender" value="female"/>女 23 </td> 24 </tr> 25 <tr> 26 <td>爱好：</td> 27 <td> 28 <input type="checkbox" name="hobby" value="tv">看电视 29 <input type="checkbox" name="hobby" value="ball">打球 30 <input type="checkbox" name="hobby" value="swimming">游泳 31 </td> 32 </tr> 33 <tr> 34 <td>省：</td><td><input type="text" name="address.province"/></td> 35 </tr> 36 <tr> 37 <td>市:</td><td><input type="text" name="address.city"/></td> 38 </tr> 39 <tr> 40 <td></td><td><input type="submit" value="提交"></td> 41 </tr> 42 43 </table> 44 45 </form> 46 </body> 47 </html>
控制器类：
1 package com.proc; 2 3 import org.springframework.stereotype.Controller; 4 import org.springframework.web.bind.annotation.RequestMapping; 5 6 @Controller 7 public class Test { 8 9 @RequestMapping("/testPOJO") 10 public String testPOJO(User user){ 11 System.out.println(user); 12 return "hello"; 13 } 14 15 }
测试：
1、进入jsp页面：
2、点击提交后，控制台输出
User [username=caoyc, password=123456, gender=male, hobby=tv,swimming, address=Address [province=sichuan, city=chengdu]]
【总结】：这里对应address属性使用的是级联属性
POJO注入数组属性
上面我们看到hobby是一个多选项。那么可以将hobby设为一个String[]类型的数组。设置后我们再次
1 @RequestMapping("/testPOJO") 2 public String testPOJO(User user){ 3 System.out.println(user); 4 System.out.println(Arrays.toString(user.getHobby())); 5 return "hello"; 6 }
输出结果：
1 User [username=caoyc, password=123456, gender=male, hobby=[Ljava.lang.String;@c3d34, address=Address [province=sichuan, city=chengdu]] 2 [tv, swimming]
上面如果输入中文。会出现中文乱码情况