public class QueryAttribute implements JSONStreamAware {   private String query;   private String cat;   private int guanwang;   private String icon;   private String entity_name;   private double score;   private String clkurl;   public QueryAttribute(String query, double score, String cat,        String entity_name, int guanwang, String icon, String clkurl) {     this.query = query;     this.cat = cat;     this.entity_name = entity_name;     this.score = score;     this.guanwang = guanwang;     this.icon = icon;     this.clkurl = clkurl;   }   public void writeJSONString(Writer out) throws IOException {     LinkedHashMap obj = new LinkedHashMap();     obj.put("query", query);     obj.put("score", score);     obj.put("cat", cat);     obj.put("ename", entity_name);     obj.put("gw", guanwang);     obj.put("icon", icon);     obj.put("clkurl", clkurl);     JSONValue.writeJSONString(obj, out);   }}

import org.json.simple.JSONObject;import org.json.simple.JSONArray;import org.json.simple.JSONValue;import java.util.*;public class Segment{    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(array.get(0));        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"));        System.out.println(obj);        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);    }}