一个案例让你学会_实体类与Json字符串互相转换

1、实体类

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

    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;
    }

}

2、实体类转为Json

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.lydms.domain.Person;

public class Test {
    public static void main(String[] args) throws InterruptedException, JsonProcessingException {
        Person person = new Person();
        person.setAge(15);
        person.setName("小明");
        ObjectMapper mapper = new ObjectMapper();
        String result = mapper.writeValueAsString(person);
        System.out.println(result);
    }
}

运行结果：

3、Json转为实体类

import com.fasterxml.jackson.databind.ObjectMapper;
import com.lydms.domain.Person;
import java.io.IOException;

public class Test {
    public static void main(String[] args) throws IOException {
        String str="{\"name\":\"小明\",\"age\":15}";
        ObjectMapper mapper = new ObjectMapper();
        Person person = mapper.readValue(str, Person.class);
        System.out.println("姓名为:"+person.getName()+"，年龄为："+person.getAge());
    }
}

运行结果：