java爬虫标准流程(简约版)

import com.sun.xml.internal.messaging.saaj.util.ByteOutputStream;import java.io.InputStream;import java.net.HttpURLConnection;import java.net.URL;class a1{public static void main(String[] args) {String add = "";try {URL url = new URL(add);HttpURLConnection httpUrlconn = (HttpURLConnection)url.openConnection();httpUrlconn.setReadTimeout(3000);httpUrlconn.connect();if(httpUrlconn.getResponseCode()==200){InputStream insp = httpUrlconn.getInputStream();ByteOutputStream ops = new ByteOutputStream();int intRet = -1;while((intRet=insp.read())!=-1){ops.write(intRet);}byte[] bytes = ops.getBytes();String ret = new String(bytes,"utf-8");System.out.println(ret);httpUrlconn.disconnect();}}catch (Exception e){System.out.print(e);}}}