Spring MVC 使用POJO对象绑定请求参数值

index.jsp前台页面加上这些，把值输入之后，通过post提交到后台。

<form action="springmvc/testPOJO" method="post">

        username: <input type="text" name="username"/>

        <br/>

        password: <input type="password" 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>

user.java

package com.hust.springmvc.entities;

public class User {

    private String username;

    private String password;

    private String email;

    private int age;

    private Address address;

    public Address getAddress() {

        return address;

    }

    public void setAddress(Address address) {

        this.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 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 + ",email=" + email + ",age=" + age + ",adress"

                + address + "]";

    }

}

address.java

package com.hust.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.hust.springmvc1;

import org.springframework.stereotype.Controller;

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

import org.springframework.web.bind.annotation.SessionAttributes;

import com.hust.springmvc.entities.User;

@Controller

@RequestMapping("/springmvc")

public class SpringMVCTest { 

    private static final String SUCCESS = "success";

    /**

     * SpringMVC 会按请求参数名和 POJO 属性名进行自动匹配， 自动为该对象填充属性值。

     * 支持级联属性。如 address.city、address.province 等

     */

    @RequestMapping("/testPOJO")

    public String testPOJO(User user) {

        System.out.println("testPOJO User: " + user);

        return SUCCESS;

    }

}

这个时候控制台就会收到前台传过来的所有的值，包括adress里面的city和province。

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