packagecom.sphere.service;importjava.io.BufferedReader;importjava.io.IOException;importjava.io.InputStream;importjava.io.InputStreamReader;importjava.net.HttpURLConnection;importjava.net.URL;public classQueryService {/*** 发起http get请求获取网页源代码

*@paramrequestUrl

*@return*@throwsIOException*/

private static String httpRequest(String requestUrl) throwsIOException{

StringBuffer buffer= null;

HttpURLConnection httpUrlConn= null;

InputStream inputStream= null;

InputStreamReader inputStreamReader= null;

BufferedReader bufferedReader= null;try{//建立连接

URL url = newURL(requestUrl);

httpUrlConn=(HttpURLConnection)url.openConnection();

httpUrlConn.setDoInput(true);

httpUrlConn.setRequestMethod("GET");//获取输入流

inputStream =httpUrlConn.getInputStream();// http://www.bjsubway.com/support/swzl/此网页是gb2312编码

inputStreamReader = new InputStreamReader(inputStream,"gb2312");

bufferedReader= newBufferedReader(inputStreamReader);//读取返回结果

buffer = newStringBuffer();

String str= null;while((str = bufferedReader.readLine())!= null){

buffer.append(str);

}

}catch(Exception e) {//TODO Auto-generated catch block

e.printStackTrace();

}finally{//释放资源，依次关闭流

if(bufferedReader != null){

bufferedReader.close();

}if(inputStreamReader != null){

inputStreamReader.close();

}if(inputStream != null){

inputStream.close();

}//释放资源，关闭http连接

if(httpUrlConn != null){

httpUrlConn.disconnect();

}

}returnbuffer.toString();

}public static void main(String[] args) throwsIOException {

String Url= "http://www.bjsubway.com/support/swzl/";

String htmlString=httpRequest(Url);

System.out.println(htmlString);

}

}