springmvc如何使用POJO作为参数

package com.gong.springmvc.entities;

public class User {
  private String username;
  private String password;
  private String email;
  private Integer age;
  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 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 + ", password=" + password + ", email=" + email + ", age=" + age
        + ", address=" + address + "]";
  }
}

package com.gong.springmvc.entities;

public class Address {
  private String city;
  private String street;
  public String getCity() {
    return city;
  }
  public void setCity(String city) {
    this.city = city;
  }
  public String getStreet() {
    return street;
  }
  public void setStreet(String street) {
    this.street = street;
  }
  @Override
  public String toString() {
    return "Address [city=" + city + ", street=" + street + "]";
  }
  
}

import com.gong.springmvc.entities.User;

@RequestMapping("/springmvc")
@Controller
public class SpringmvcTest {
  private static final String SUCCESS = "success";
  
  @RequestMapping(value="/testPojo")
  public String testPojo(User user) {
    System.out.println("testPojo:"+user);
    return SUCCESS;
  }
}

<form action="springmvc/testPojo" method="POST"><br>
    <span>username:</span><input type="text" name="username"><br>
    <span>password:</span><input type="password" name="password"><br>
    <span>email:</span><input type="text" name="password"><br>
    <span>age:</span><input type="text" name="password"><br>
    <span>city:</span><input type="text" name="address.city"><br>
    <span>street:</span><input type="text" name="address.street"><br>
    <input type="submit" value="submit"><br>
  </form>