如何在java中使用json data/json response创建pojo类？

public class Person {
  private String name;
  private int age;
  private String email;

  // 必须有一个无参构造函数
  public Person() {}

  // 可以有带参数的构造函数
  public Person(String name, int age, String email) {
    this.name = name;
    this.age = age;
    this.email = email;
  }

  // getter和setter方法
  public String getName() {
    return name;
  }

  public void setName(String name) {
    this.name = name;
  }

  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;
  }
}

import com.fasterxml.jackson.databind.ObjectMapper;

public class Main {
  public static void main(String[] args) {
    String json = "{\"name\":\"John\",\"age\":25,\"email\":\"john@example.com\"}";

    try {
      ObjectMapper objectMapper = new ObjectMapper();
      Person person = objectMapper.readValue(json, Person.class);

      System.out.println(person.getName());
      System.out.println(person.getAge());
      System.out.println(person.getEmail());
    } catch (Exception e) {
      e.printStackTrace();
    }
  }
}