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 );　　 } }