Java handles JSON's tool class (conversion between List,map and JSON) __java

Need to download a third party Jar:net.sf.json

Import Java.io.BufferedReader;
Import Java.io.InputStream;
Import Java.io.InputStreamReader;
Import Java.net.URL;
Import java.util.ArrayList;
Import Java.util.Iterator;
Import java.util.List;
Import Java.util.Map;
Import Java.util.Set;
Import Org.apache.commons.collections.map.ListOrderedMap;
Import Net.sf.json.JSONArray;
Import Net.sf.json.JSONObject;
/** * * Tool class for processing JSON.
    * <br> This class is a tool class for processing JSON * @author SLJ/public class Jsontools {/** * * JSON conversion list. * <br> Detailed description * @param jsonstr JSON String * @return * @return list<map<string,object>> List * @throws * @author SLJ * @date December 24, 2013 afternoon 1:08:03 * * public static list<map<string, Object>&gt ;
        Parsejson2list (String jsonstr) {Jsonarray Jsonarr = Jsonarray.fromobject (JSONSTR);
        list<map<string, object>> list = new arraylist<map<string,object>> ();
        Iterator<jsonobject> it = Jsonarr.iterator (); while (it. Hasnext ()) {Jsonobject json2 = It.next ();
        List.add (Parsejson2map (json2.tostring ()));
    } return list;
   /** * * JSON transforms map. * <br> Detailed description * @param jsonstr JSON String * @return * @return map<string,object> Collection * @throws * @auth or SLJ */public static map<string, object> Parsejson2map (String jsonstr) {Listorderedmap Map = new
        Listorderedmap ();
        Outermost parse Jsonobject JSON = Jsonobject.fromobject (JSONSTR); 
            For (object K:json.keyset ()) {Object v = json.get (k);  If the inner layer is still an array, continue parsing if (v instanceof jsonarray) {list<map<string, object>> List = new
                Arraylist<map<string,object>> ();
                Iterator<jsonobject> it = ((Jsonarray) v). iterator ();
                    while (It.hasnext ()) {Jsonobject json2 = It.next ();
  List.add (Parsejson2map (json2.tostring ()));              } map.put (K.tostring (), list);
            else {map.put (k.tostring (), v);
    } return map;
    /** * * gets JSON data via HTTP. 
    * <br> get JSON data via HTTP return list * @param URL link * @return * @return list<map<string,object>> List 
        * @throws * @author SLJ/public static list<map<string, object>> getlistbyurl (String URL) {
            try {//Get JSON data inputstream in = new URL (URL) via HTTP. OpenStream ();
            BufferedReader reader = new BufferedReader (new InputStreamReader (in));
            StringBuilder sb = new StringBuilder ();
            String Line;
            while ((Line=reader.readline ())!=null) {sb.append (line);
        Return Parsejson2list (Sb.tostring ());
        catch (Exception e) {e.printstacktrace ();
    return null; /** * * via HTTP GET JSon data.  * <br> get JSON data via HTTP return Map * @param URL link * @return * @return map<string,object> Collection * @throws * @author SLJ */public static map<string, object> getmapbyurl (String url) {try {//through HTT
            P Gets the JSON data inputstream in = new URL (URL). OpenStream ();
            BufferedReader reader = new BufferedReader (new InputStreamReader (in));
            StringBuilder sb = new StringBuilder ();
            String Line;
            while ((Line=reader.readline ())!=null) {sb.append (line);
        Return Parsejson2map (Sb.tostring ());
        catch (Exception e) {e.printstacktrace ();
    return null;
    }/** * * Map converts JSON.
    * <br> Detailed description * @param map Collection * @return * @return string JSON String * @throws * @author SLJ * * public static String Maptojson (map<string, string> Map) {set<string> keys = Map.keyset ();
        String key = "";
        String value = "";
        StringBuffer jsonbuffer = new StringBuffer ();
        Jsonbuffer.append ("{"); for (iterator<string> it = Keys.iterator (); It.hasnext ();)
            {key = (String) it.next ();
            Value = Map.get (key);
            Jsonbuffer.append (key + ":" + "\" "+ value+" ");
            if (It.hasnext ()) {Jsonbuffer.append (",");
        } jsonbuffer.append ("}");
    return jsonbuffer.tostring ();
        }//test public static void Main (string[] args) {String url = "http://...";
        list<map<string,object>> list = Getlistbyurl (URL);
    SYSTEM.OUT.PRINTLN (list); }
}