SpringMVC之使用 POJO 对象绑定请求参数值

Spring MVC 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：dept.deptId、dept.address.tel 等
示例：

User实体类

package com.led.entities;

/**
 * @author Alan
 * @date 2018/5/26 15:02
 */
public class User {
    private String username;
    private String password;
    private int age;
    private String email;
    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 int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public Address getAddress() {
        return address;
    }

    public void setAddress(Address address) {
        this.address = address;
    }

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

Address实体类

package com.led.entities;

/**
 * @author Alan
 * @date 2018/5/26 15:04
 */
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 + '\'' +
                '}';
    }
}

处理类：

package com.led.test;

import com.led.entities.User;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.*;

/**
 * @author Alan
 * @date 2018/5/25 22:03
 */
@Controller
@RequestMapping("/test")
public class SpringMVCTest {
    private static final String SUCCESS = "success";

    @RequestMapping("/testPojo")
    public String testPojo(User user){
        System.out.println("User: " + user);
        return SUCCESS;
    }
}

jsp页面：

<form action="test/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>
    province:<input type="text" name="address.province"/><br>
    city:<input type="text" name="address.city"/><br>
    <input type="submit" value="submit">
</form>

运行项目，输入信息：

点击提交按钮，控制台输出：

User: User{username='xiaoming', password='123456', age=11, email='1212@qq.com', address=Address{province='xizang', city='lasa'}}