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springMVC之POJO对象绑定请求参数

2016-11-04 00:00 465 查看

springMVC的POJO：SpringMVC会按照请求参数名和POJO属性名进行自动匹配，自动为该对象填充属性值，并且支持级联属性。如：dept.deptId、dept.address.tel等

简单来说，就是提交一个表单数据，然后springmvc帮我们把提交过来的参数，一一对应地填充到对象中去。

User.java

package com.f145a.springmvc.entities;

public class User {

private String username;
private String password;
private String email;
private int age;
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 Address getAddress() {
return address;
}
public void setAddress(Address address) {
this.address = address;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}

@Override
public String toString() {
return "User [username=" + username + ", password=" + password + ", address=" + address + ", email=" + email
+ ", age=" + age + "]";
}
}

Address.java

package com.f145a.springmvc.entities;

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 + "]";
}
}

SpringMVCTest.java

package com.f145a.springmvc.handlers;

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

import com.f145a.springmvc.entities.User;;

@RequestMapping("/springmvc")
@Controller
public class SpringMVCTest {

private static final String SUCCESS="success";

/**
* springMVC会按请求参数名和POJO属性进行自动匹配
*/
@RequestMapping("/testPojo")
public String testPojo(User user) {
System.out.println("testPojo:"+user);
return SUCCESS;
}
}

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>
<form action="springmvc/testPojo" method="post">
username:<input type="text" name="username"/>
<br>
password:<input type="text" name="password"/>
<br>
email:<input type="text" name="email"/>
<br>
age:<input type="text" name="age"/>
<br>
city:<input type="text" name="address.city">
<br>
province:<input type="text" name="address.province">
<br>
<input type="submit" value="submit">
</form>
</body>
</html>

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标签： spingMVC POJO

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