Json Simple 简明教程

JSON.simple - Using JSONValue

JSONValue 提供静态方法 parse(),用于解析给定的 json 字符串以返回 JSONObject,然后可以使用它来获取已解析的值。请参阅下面的示例。

Example

import org.json.simple.JSONArray;
import org.json.simple.JSONObject;
import org.json.simple.JSONValue;

public class JsonDemo {
   public static void main(String[] args) {
      String s = "[0,{\"1\":{\"2\":{\"3\":{\"4\":[5,{\"6\":7}]}}}}]";
      Object obj = JSONValue.parse(s);
      JSONArray array = (JSONArray)obj;

      System.out.println("The 2nd element of array");
      System.out.println(array.get(1));
      System.out.println();

      JSONObject obj2 = (JSONObject)array.get(1);
      System.out.println("Field \"1\"");
      System.out.println(obj2.get("1"));

      s = "{}";
      obj = JSONValue.parse(s);
      System.out.println(obj);

      s = "[5,]";
      obj = JSONValue.parse(s);
      System.out.println(obj);

      s = "[5,,2]";
      obj = JSONValue.parse(s);
      System.out.println(obj);
   }
}

Output

The 2nd element of array
{"1":{"2":{"3":{"4":[5,{"6":7}]}}}}

Field "1"
{"2":{"3":{"4":[5,{"6":7}]}}}
{}
[5]
[5,2]