Java 讀取網頁原始碼

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package com.sphere.service;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.net.HttpURLConnection;import java.net.URL;public class QueryService {    /**     * 發起http get請求擷取網頁原始碼     * @param requestUrl     * @return     * @throws IOException      */    private static String httpRequest(String requestUrl) throws IOException{                StringBuffer buffer = null;        HttpURLConnection httpUrlConn = null;        InputStream inputStream = null;        InputStreamReader inputStreamReader = null;        BufferedReader bufferedReader = null;                try {            // 建立串連              URL url = new URL(requestUrl);            httpUrlConn = (HttpURLConnection)url.openConnection();            httpUrlConn.setDoInput(true);              httpUrlConn.setRequestMethod("GET");                         //擷取輸入資料流            inputStream = httpUrlConn.getInputStream();            //    http://www.bjsubway.com/support/swzl/ 此網頁是gb2312編碼            inputStreamReader  = new InputStreamReader(inputStream,"gb2312");            bufferedReader = new BufferedReader(inputStreamReader);                        // 讀取返回結果           buffer = new StringBuffer();           String str = null;           while((str = bufferedReader.readLine())!= null){               buffer.append(str);           }        } catch (Exception e) {            // TODO Auto-generated catch block            e.printStackTrace();        }finally{            //釋放資源，依次關閉流            if(bufferedReader != null){                bufferedReader.close();            }            if(inputStreamReader != null){                inputStreamReader.close();            }            if(inputStream != null){                inputStream.close();            }            //釋放資源，關閉http串連            if(httpUrlConn != null){                httpUrlConn.disconnect();            }                    }        return buffer.toString();    }        public static void main(String[] args) throws IOException {        String Url = "http://www.bjsubway.com/support/swzl/";        String htmlString = httpRequest(Url);        System.out.println(htmlString);    }}

 

Java 讀取網頁原始碼