JSONObject and json

To make the program run, the JSON-lib package must be introduced. The JSON-lib package also depends on the following JAR packages:
1.commons-lang.jar
2.commons-beanutils.jar
3.commons-collections.jar
4.commons-logging.jar
5.ezmorph.jar
6.json-lib-2.2.2-jdk15.jar

2. JSONObject object usage
The JSON-lib package is a set of beans, collections, maps, java arrays and A package for converting XML and JSON to and from each other. In this example, we will create JSONObject objects using the JSONObject class and then we print the values ​​of these objects. In order to use JSONObject objects, we need to introduce the "net.sf.json" package. To add elements to an object, we use the put() method.

import net.sf.json.JSONArray;   
import net.sf.json.JSONObject;   
  
public class JSONObjectSample {   
      
    //创建JSONObject对象   
    private static JSONObject createJSONObject(){   
        JSONObject jsonObject = new JSONObject();   
        jsonObject.put("name", "kevin");   
        jsonObject.put("Max.score", new Integer(100));   
        jsonObject.put("Min.score", new Integer(50));   
        jsonObject.put("nickname", "picglet");   
        return jsonObject;   
    }   
    public static void main(String[] args) {   
        JSONObject jsonObject = JSONObjectSample.createJSONObject();   
        //输出jsonobject对象   
        System.out.println("jsonObject==>"+jsonObject);   
           
        //判读输出对象的类型   
        boolean isArray = jsonObject.isArray();   
        boolean isEmpty = jsonObject.isEmpty();   
        boolean isNullObject = jsonObject.isNullObject();   
        System.out.println("isArray:"+isArray+" isEmpty:"+isEmpty+" isNullObject:"+isNullObject);   
           
        //添加属性   
        jsonObject.element("address", "swap lake");   
        System.out.println("添加属性后的对象==>"+jsonObject);   
           
        //返回一个JSONArray对象   
        JSONArray jsonArray = new JSONArray();   
        jsonArray.add(0, "this is a jsonArray value");   
        jsonArray.add(1,"another jsonArray value");   
        jsonObject.element("jsonArray", jsonArray);   
        JSONArray array = jsonObject.getJSONArray("jsonArray");   
        System.out.println("返回一个JSONArray对象："+array);   
        //添加JSONArray后的值   
        //{"name":"kevin","Max.score":100,"Min.score":50,"nickname":"picglet","address":"swap lake",   
        //"jsonArray":["this is a jsonArray value","another jsonArray value"]}   
        System.out.println(jsonObject);   
           
        //根据key返回一个字符串   
        String jsonString = jsonObject.getString("name");   
        System.out.println("jsonString==>"+jsonString);   
    }   
}  
import net.sf.json.JSONArray;
import net.sf.json.JSONObject;
public class JSONObjectSample {
       
        //创建JSONObject对象
        private static JSONObject createJSONObject(){
                JSONObject jsonObject = new JSONObject();
                jsonObject.put("name", "kevin");
                jsonObject.put("Max.score", new Integer(100));
                jsonObject.put("Min.score", new Integer(50));
                jsonObject.put("nickname", "picglet");
                return jsonObject;
        }
        public static void main(String[] args) {
                JSONObject jsonObject = JSONObjectSample.createJSONObject();
                //输出jsonobject对象
                System.out.println("jsonObject==>"+jsonObject);
               
                //判读输出对象的类型
                boolean isArray = jsonObject.isArray();
                boolean isEmpty = jsonObject.isEmpty();
                boolean isNullObject = jsonObject.isNullObject();
                System.out.println("isArray:"+isArray+" isEmpty:"+isEmpty+" isNullObject:"+isNullObject);
               
                //添加属性
                jsonObject.element("address", "swap lake");
                System.out.println("添加属性后的对象==>"+jsonObject);
               
                //返回一个JSONArray对象
                JSONArray jsonArray = new JSONArray();
                jsonArray.add(0, "this is a jsonArray value");
                jsonArray.add(1,"another jsonArray value");
                jsonObject.element("jsonArray", jsonArray);
                JSONArray array = jsonObject.getJSONArray("jsonArray");
                System.out.println("返回一个JSONArray对象："+array);
                //添加JSONArray后的值
                //{"name":"kevin","Max.score":100,"Min.score":50,"nickname":"picglet","address":"swap lake",
                //"jsonArray":["this is a jsonArray value","another jsonArray value"]}
                System.out.println(jsonObject);
               
                //根据key返回一个字符串
                String jsonString = jsonObject.getString("name");
                System.out.println("jsonString==>"+jsonString);
        }
}