Spring MVC POJO传参方式

有两POJO类

Address.java

 package com.proc;

 public class Address {

     private String province;
     private String city;
     public String getProvince() {
         return province;
     }
     public void setProvince(String province) {
         this.province = province;
     }
     public String getCity() {
         return city;
     }
     public void setCity(String city) {
         this.city = city;
     }
     @Override
     public String toString() {
         return "Address [province=" + province + ", city=" + city + "]";
     }
 }

User.java

 package com.proc;

 public class User {

     private String username;
     private String password;
     private String gender;
     private String hobby;
     private Address address;
     public String getUsername() {
         return username;
     }
     public void setUsername(String username) {
         this.username = username;
     }
     public String getPassword() {
         return password;
     }
     public void setPassword(String password) {
         this.password = password;
     }
     public String getGender() {
         return gender;
     }
     public void setGender(String gender) {
         this.gender = gender;
     }
     public String getHobby() {
         return hobby;
     }
     public void setHobby(String hobby) {
         this.hobby = hobby;
     }
     public Address getAddress() {
         return address;
     }
     public void setAddress(Address address) {
         this.address = address;
     }
     @Override
     public String toString() {
         return "User [username=" + username + ", password=" + password
                 + ", gender=" + gender + ", hobby=" + hobby + ", address="
                 + address + "]";
     }
 }

JSP页面

 <%@ page language="java" import="java.util.*" pageEncoding="utf-8" contentType="text/html; charset=utf-8"%>

 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
 <html>
   <head>

   </head>

   <body>
     <form action="testPOJO" method="post">
     <table>
         <tr>
             <td>用户名:</td><td><input type="text" name="username"/></td>
         </tr>
         <tr>
             <td>密码:</td><td><input type="password" name="password"/></td>
         </tr>
         <tr>
             <td>性别:</td>
             <td>
                 <input type="radio" checked="checked" name="gender" value="male"/>男
                    <input type="radio" name="gender" value="female"/>女
                </td>
         </tr>
         <tr>
             <td>爱好：</td>
             <td>
                 <input type="checkbox" name="hobby" value="tv">看电视
                 <input type="checkbox" name="hobby" value="ball">打球
                 <input type="checkbox" name="hobby" value="swimming">游泳
             </td>
         </tr>
         <tr>
             <td>省：</td><td><input type="text" name="address.province"/></td>
         </tr>
         <tr>
             <td>市:</td><td><input type="text" name="address.city"/></td>
         </tr>
         <tr>
             <td></td><td><input type="submit" value="提交"></td>
         </tr>

        </table>

     </form>
   </body>
 </html>

控制器类：

 package com.proc;

 import org.springframework.stereotype.Controller;
 import org.springframework.web.bind.annotation.RequestMapping;

 @Controller
 public class Test {

     @RequestMapping("/testPOJO")
     public String testPOJO(User user){
         System.out.println(user);
         return "hello";
     }

 }

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

 @RequestMapping("/testPOJO")
 public String testPOJO(User user){
     System.out.println(user);
     System.out.println(Arrays.toString(user.getHobby()));
     return "hello";
 }

　　输出结果：

 User [username=caoyc, password=123456, gender=male, hobby=[Ljava.lang.String;@c3d34, address=Address [province=sichuan, city=chengdu]]
 [tv, swimming]

上面如果输入中文。会出现中文乱码情况