妙博客

 public static String getSelfIp() {  
         try {  
             URL url = new URL("http://pv.sohu.com/cityjson");  
             BufferedReader br = new BufferedReader(new InputStreamReader(url.openStream()));  
             String s = "";  
             StringBuffer sb = new StringBuffer("");   
             String webContent = "";  
             while ((s = br.readLine()) != null) {  
                 sb.append(s + "\r\n");  
             }  
             br.close();  
             webContent = sb.toString();  
             int start = webContent.indexOf("{");  
             int end = webContent.indexOf("}") + 1;  
             webContent = webContent.substring(start,end);   
             
             JSONObject obj = JSON.parseObject(webContent);
             
             return obj.getString("cip");  
         } catch (Exception e) {  
             e.printStackTrace();  
             return null;  
         }  
     }