如何抓取网络数据

Question

            url = new URL("http://www.sina.com.cn"); 
            URLConnection urlConn = url.openConnection(); 
            DataInputStream din = new DataInputStream(urlConn.getInputStream()); 
            byte[] buf = new byte[1024]; 
            int length = din.available(); 
            System.out.println("######" + length + "######"); 
            int readlength = 0; 
            while (true) { 
                readlength += din.read(buf); 
                System.out.print(new String(buf)); 
                if (readlength >= length) { 
                    break; 
                } 
            } 
            System.out.println("\n######" + readlength + "######"); 
如何抓取查看是编译后的html代码 
相当于C#的WebResponse

Answer 1

URL url = new URL("http://www.sina.com.cn"); 
HttpURLConnection urlConn = (HttpURLConnection )url.openConnection(); 
if(urlConn.getResponseCode()==HttpURLConnection.HTTP_OK){//这表示成功返回
  InputStream is=urlConn.getInputStream();//输入流，从这里读取数据就行了}