JSONObject.toJavaObject的使用以及其他方法的使用JSON与Java对象的转换

JSON对象–>Java对象

JSONObject.toJavaObject(JSON对象实例, Java对象.class);

public class JSON2JavaTest{
    public static void main(String[] args) {
        Student stu = new Student("公众号编程大道", "m", 2);

        //先转成JSON对象
        JSONObject jsonObject = (JSONObject) JSONObject.toJSON(stu);
        
        //JSON对象转换成Java对象
        Student student = JSONObject.toJavaObject(jsonObject, Student.class);
        System.out.println("JSON对象转换成Java对象\n" + student);//Student{name='公众号编程大道', sex='m', age=2}
    }
}

JSON字符串–>Java对象

public class JSON2JavaTest{
    public static void main(String[] args) {
        String stuString = "{\"age\":2,\"name\":\"公众号编程大道\",\"sex\":\"m\"}";

        //JSON字符串转换成Java对象
        Student student1 = JSONObject.parseObject(stuString, Student.class);
        System.out.println("JSON字符串转换成Java对象\n" + student1);//Student{name='公众号编程大道', sex='m', age=2}
    }}

public class JSON2JavaTest{
    public static void main(String[] args) {
        String stuString = "{\"age\":2,\"name\":\"公众号编程大道\",\"sex\":\"m\"}";

        //JSON字符串转换成JSON对象
        JSONObject jsonObject1 = JSONObject.parseObject(stuString);
        System.out.println("JSON字符串转换成JSON对象\n" + jsonObject1);//{"sex":"m","name":"公众号编程大道","age":2}
    }}
```[详细参考](https://www.cnblogs.com/ibigboy/p/11124524.html)