将JSON转换成MAP的工具类
文章来源：http://www.blogjava.net/parable-myth/archive/2013/01/30/394954.html
package digu.pendant.util;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URL;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import net.sf.json.JSONArray;
import net.sf.json.JSONObject;
public class PandantTools {
public static List<Map<String, Object>> 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;
}
public static Map<String, Object> parseJSON2Map(String jsonStr){
Map<String, Object> map = new HashMap<String, Object>();
//最外层解析
JSONObject json = JSONObject.fromObject(jsonStr);
for(Object k : json.keySet()){
Object v = json.get(k);
//如果内层还是数组的话，继续解析
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;
}
public static List<Map<String, Object>> getListByUrl(String url){
try {
//通过HTTP获取JSON数据
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 parseJSON2List(sb.toString());
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
public static Map<String, Object> getMapByUrl(String url){
try {
//通过HTTP获取JSON数据
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;
}
//test
public static void main(String[] args) {
String url = "http://...";
List<Map<String,Object>> list = getListByUrl(url);
System.out.println(list);
}
}