/**

     * 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

     */

    @RequestMapping("/testPojo")

    public String testPojo(User user){

        System.out.println(user);

        return SUCCESS;

    }

package com.springmvc.entities;

public class User {

    private String username;

    private Integer age;

    private Address address;

    public String getUsername() {

        return username;

    }

    public void setUsername(String username) {

        this.username = username;

    }

    public Integer getAge() {

        return age;

    }

    public void setAge(Integer age) {

        this.age = age;

    }

    public Address getAddress() {

        return address;

    }

    public void setAddress(Address address) {

        this.address = address;

    }

    @Override

    public String toString() {

        return "User [username=" + username + ", age=" + age + ", address="

                + address + "]";

    }

}

package com.springmvc.entities;

public class Address {

    private String city;

    private String country;

    public String getCity() {

        return city;

    }

    public void setCity(String city) {

        this.city = city;

    }

    public String getCountry() {

        return country;

    }

    public void setCountry(String country) {

        this.country = country;

    }

    @Override

    public String toString() {

        return "Address [city=" + city + ", country=" + country + "]";

    }

}