json字符串转Java类,代码编译测试 - 在线编译器(yxjc123.com)

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import com.alibaba.fastjson2.JSON;
import com.alibaba.fastjson2.JSONObject;
import com.alibaba.fastjson2.TypeReference;

import java.util.List;

/**
 *解析Json字符串反序列化为Java对象
 */
public class StringToJSON {
    public static void main(String[] args) {
        //定义JSON字符串
        String jsonStr = "{\"age\":22,\"name\":\"易学教程\",\"sex\":\"male\"}";
        Employee e = (Employee) JSON.parseObject(jsonStr, Employee.class);//简单java类解析
        System.out.println("json字符串转简单java对象:"+e.toString());
        //解析带有list的json字符串
        String jsonStr2 = "[{\"age\":22,\"name\":\"易学教程\",\"sex\":\"male\"},{\"age\":23,\"name\":\"易学教程2\",\"sex\":\"male\"},{\"age\":25,\"name\":\"易学教程3\",\"sex\":\"male\"}]";
        List<Employee> list =
        JSONObject.parseObject(jsonStr2, new TypeReference<List<Employee>>(){});
        System.out.println(list);

    }
}

//JavaBean.java
class  Employee{

    private String name;
    private String sex;
    private Integer age;

    @Override
    public String toString() {
        return "Employee{" +
                "name='" + name + '\'' +
                ", sex='" + sex + '\'' +
                ", age=" + age +
                '}';
    }
    public Employee() {
    }
    public Employee(String name, String sex, Integer age) {
        this.name = name;
        this.sex = sex;
        this.age = age;
    }

    public String getName() {
        return name;
    }

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

    public String getSex() {
        return sex;
    }

    public void setSex(String sex) {
        this.sex = sex;
    }

    public Integer getAge() {
        return age;
    }

    public void setAge(Integer age) {
        this.age = age;
    }
}
​x
 
import com.alibaba.fastjson2.JSON;
import com.alibaba.fastjson2.JSONObject;
import com.alibaba.fastjson2.TypeReference;
​
import java.util.List;
​
/**
 *解析Json字符串反序列化为Java对象
 */
public class StringToJSON {
    public static void main(String[] args) {
        //定义JSON字符串
        String jsonStr = "{\"age\":22,\"name\":\"易学教程\",\"sex\":\"male\"}";
        Employee e = (Employee) JSON.parseObject(jsonStr, Employee.class);//简单java类解析
        System.out.println("json字符串转简单java对象:"+e.toString());
        //解析带有list的json字符串
        String jsonStr2 = "[{\"age\":22,\"name\":\"易学教程\",\"sex\":\"male\"},{\"age\":23,\"name\":\"易学教程2\",\"sex\":\"male\"},{\"age\":25,\"name\":\"易学教程3\",\"sex\":\"male\"}]";
        List<Employee> list =
        JSONObject.parseObject(jsonStr2, new TypeReference<List<Employee>>(){});
        System.out.println(list);
​
    }
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