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
时间： 2024-10-07 00:23:11