fastjson--对象与JSON之间的转换方法

1、Java对象–>JSON对象：

(JSONObject)JSONObject.toJSON(Java对象实例)

public class JSON2JavaTest{  public static void main(String[] args) {     Student stu = new Student("公众号", "m", 2);     //Java对象转化为JSON对象     JSONObject jsonObject = (JSONObject) JSONObject.toJSON(stu);     System.out.println("Java对象转化为JSON对象\n" + jsonObject);//{"name":"编程","age":2,"sex":"m"}  }}

2、Java对象–>JSON字符串

JSONObject.toJSONString(Java对象实例)

public class JSON2JavaTest{    public static void main(String[] args) {        Student stu = new Student("公众y", "m", 2);        //Java对象转换成JSON字符串        String stuString = JSONObject.toJSONString(stu);        System.out.println("Java对象转换成JSON字符串\n" + stuString);//{"age":2,"name":"大道","sex":"m"}    }}

3、JSON对象–>JSON字符串

JSONObject.toJSONString();

public class JSON2JavaTest{ public static void main(String[] args) {     Student stu = new Student("公众oy", "m", 2);     //先转成JSON对象     JSONObject jsonObject = (JSONObject) JSONObject.toJSON(stu);     //JSON对象转换为JSON字符串     String jsonString = jsonObject.toJSONString();     System.out.println("JSON对象转换为JSON字符串\n" + jsonString);//{"name":"公大道","age":2,"sex":"m" }}

4、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erBoy", "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='公众道', sex='m', age=2}    }}

5、JSON字符串–>JSON对象

JSONObject.parseObject(JSON字符串)

public class JSON2JavaTest{ public static void main(String[] args) {     String stuString = "{\"age\":2,\"name\":\"公众 Big\",\"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":"公众道","age": }}

6、JSON字符串–>Java对象

JSONObject.parseObject(JSON字符串, Java对象.class);

public class JSON2JavaTest{    public static void main(String[] args) {        String stuString = "{\"age\":2,\"name\":\"公号 By\",\"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='公程大道', sex='m', age=2    }}

7、JSON字符串–>List

List parseArray(JSON字符串, Java对象.class)

public class JSON2JavaTest{    public static void main(String[] args) {        String stuString = "[{\"age\":2,\"name\":\"公号\",\"sex\":\"m\"},{\"age\":18,\"name\":\"BirBoy\",\"sex\":\"m\"}]";        //JSON字符串转换成Java对象        List<Student> studentList = JSONObject.parseArray(stuString, Student.class);        System.out.println("JSON字符串转换成Java对象list\n" +studentList );　　 } }

来源地址：https://blog.csdn.net/u013111855/article/details/129839327