https://www.cnblogs.com/caoyc/p/5635640.html
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，会出现乱码情况。