JSONObject，JSONArray使用手册

    import net.sf.json.JSONArray;          import net.sf.json.JSONObject;          import java.util.*;          /**         *         * @author derek         */          public class JavaTest {              public static void main(String[] args){                   JSONObject obj=new JSONObject();                 obj.put("derek","23");                 obj.put("dad", "49");                 obj.put("mom", "45");                 System.out.println("通过构造器的方式创建的JSONObject对象："+obj);                                  Map<String,String> map=new LinkedHashMap<>();                 map.put("derek","23");                 map.put("dad", "49");                 map.put("mom", "45");                 System.out.println("通过fromObject方法将map对象转换为JSONObject对象："+JSONObject.fromObject(map));                                  JSONArray arr=new JSONArray();                 arr.add(0,"derek");                 arr.add(1,"dad");                 arr.add(2,"mom");                 System.out.println("通过构造器的方式创建的JSONArray："+arr);                                  ArrayList<String> list=new ArrayList<>();                 list.add("derek");                 list.add("dad");                 list.add("mom");                 System.out.println("通过fromObject方法将Arraylist对象转换为JSONArray对象："+JSONArray.fromObject(list));                                  System.out.println("将HashMap对象通过fromObject方法转换为JSONArray对象"+JSONArray.fromObject(map));                                  String str="{\"derek\":23,\"dad\":49,\"mom\":45}";                 System.out.println("解析之后的JSON对象："+JSONObject.fromObject(str));                                  //遍历输出                 Iterator<String> it=obj.keys();                 while(it.hasNext()){                     String key=it.next();                     System.out.println(key+":"+obj.get(key));                 }              }                        }