URLConnection

public static void getJson(){
  StringBuffer document = new StringBuffer();  
  try{   
   URL url = new URL("http://www.weather.com.cn/data/sk/101010100.html");//远程url   
   URLConnection conn = url.openConnection();     
   BufferedReader reader = new BufferedReader(new InputStreamReader(conn.getInputStream()));     
   String line = null;     
   while ((line = reader.readLine()) != null)
    document.append(line + " ");     
   reader.close();  
  }catch(MalformedURLException e) {   
   e.printStackTrace();   
  }catch(IOException e){     
   e.printStackTrace();   }  
  System.out.println(document.toString());//返回值
  
 }