java 多条json数据 java jsonstring

Java中Json转string方法

Java利用Json-lib包进行json对象转换成string

JSONArray转换string方法实例

public static void main(String[] args) throws JSONException {undefined

//创建JSONObject对象

JSONObject json = new JSONObject();

//向json中添加数据

json.put("username", "wanglihong");

json.put("height", 12.5);

json.put("age", 24);

//创建JSONArray数组，并将json添加到数组

JSONArray array = new JSONArray();

array.put(json);

//转换为字符串

String jsonStr = array.toString()

System.out.println(jsonStr);

}

输出结果：

[{"username":"wanglihong","height":12.5,"age":24}]

JSONObject转换string方法实例

public class User {undefined

String id;

String name;

int age;

Book book;

}

public class Book {undefined

String id;

String name;

}

public class Json {undefined

public static void main(String[] args) {undefined

Book book = new Book();

book.setId("111");

book.setName("语文");

User u = new User();

u.setId("002");

u.setName("xim");

u.setBook(book);

JSONObject jo = JSONObject.fromObject(u);

System.out.println(jo);

}

}