【JAVA】JAVA程式根據url請求網站HTML頁面
阿新 • • 發佈：2019-01-01
package HtmlBody; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import org.apache.http.HttpEntity; import org.apache.http.HttpResponse; import org.apache.http.client.ClientProtocolException; import org.apache.http.client.methods.HttpGet; import org.apache.http.impl.client.DefaultHttpClient; import org.apache.http.protocol.HTTP; import org.apache.http.util.EntityUtils; @SuppressWarnings("deprecation") public class HtmlBody { /** * 根據url獲取html頁面 * * @param url * @return */ public static String getBody(String url) { // 例項一個http客戶端 DefaultHttpClient httpClient = new DefaultHttpClient(); // 例項一個httpGet請求，url放進去 HttpGet httpGet = new HttpGet(url); try { // 用客戶端執行get請求，並得到一個response迴應，這裡的執行時間根據客戶端請求伺服器的時間來決定 // 如連線不成功會有IO異常 HttpResponse response = httpClient.execute(httpGet); // 獲取response裡面的內容等。 HttpEntity entity = response.getEntity(); // 將entity元素通過Entity工具類轉化為字串形式，此時即為url頁面html的字串,這裡的UTF_8為頁面的實際編碼 String body = EntityUtils.toString(entity, HTTP.UTF_8); return body; } catch (ClientProtocolException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); }finally { httpClient.close(); } return null; } /** * HTML頁面存檔 * * @param body */ public static void htmlToDisk(String body) { FileOutputStream fos = null; try { // 定義檔名，./代表專案目錄 fos = new FileOutputStream("./index.html"); // 寫檔案流 fos.write(body.getBytes()); fos.close(); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { try { fos.close(); } catch (IOException e1) { e1.printStackTrace(); } e.printStackTrace(); } } public static void main(String[] args) { String url = "http://www.baidu.com"; String body = getBody(url); System.out.println(body); htmlToDisk(body); // //谷歌連線不上，會有異常 // url = "http://www.google.com"; // body = getBody(url); // System.out.println(body); } }
【結果】
//index.html<!DOCTYPE html> <!--STATUS OK--> <html> <head> <meta http-equiv=content-type content=text/html;charset=utf-8> <meta http-equiv=X-UA-Compatible content=IE=Edge> <meta content=always name=referrer> <link rel=stylesheet type=text/css href=http://s1.bdstatic.com/r/www/cache/bdorz/baidu.min.css> <title>百度一下，你就知道</title> </head> <body link=#0000cc> <div id=wrapper> <div id=head> <div class=head_wrapper> <div class=s_form> <div class=s_form_wrapper> <div id=lg> <img hidefocus=true src=//www.baidu.com/img/bd_logo1.png width=270 height=129> </div> <form id=form name=f action=//www.baidu.com/s class=fm> <input type=hidden name=bdorz_come value=1> <input type=hidden name=ie value=utf-8> <input type=hidden name=f value=8> <input type=hidden name=rsv_bp value=1> <input type=hidden name=rsv_idx value=1> <input type=hidden name=tn value=baidu> <span class="bg s_ipt_wr"> <input id=kw name=wd class=s_ipt value maxlength=255 autocomplete=off autofocus> </span> <span class="bg s_btn_wr"> <input type=submit id=su value=百度一下 class="bg s_btn"> </span> </form> </div> </div> <div id=u1> <a href=http://news.baidu.com name=tj_trnews class=mnav>新聞</a> <a href=http://www.hao123.com name=tj_trhao123 class=mnav>hao123</a> <a href=http://map.baidu.com name=tj_trmap class=mnav>地圖</a> <a href=http://v.baidu.com name=tj_trvideo class=mnav>視訊</a> <a href=http://tieba.baidu.com name=tj_trtieba class=mnav>貼吧</a> <noscript> <a href=http://www.baidu.com/bdorz/login.gif?login&tpl=mn&u=http%3A%2F%2Fwww.baidu.com%2f%3fbdorz_come%3d1 name=tj_login class=lb>登入</a> </noscript> <script>document.write('<a href="http://www.baidu.com/bdorz/login.gif?login&tpl=mn&u='+ encodeURIComponent(window.location.href+ (window.location.search === "" ? "?" : "&")+ "bdorz_come=1")+ '" name="tj_login" class="lb">登入</a>');</script> <a href=//www.baidu.com/more / name=tj_briicon class=bri style="display: block;">更多產品</a> </div> </div> </div> <div id=ftCon> <div id=ftConw> <p id=lh> <a href=http://home.baidu.com>關於百度</a> <a href=http://ir.baidu.com>About Baidu</a> </p> <p id=cp> ©2017 Baidu <a href=http://www.baidu.com/duty /> 使用百度前必讀 </a> <a href=http://jianyi.baidu.com / class=cp-feedback>意見反饋</a> 京ICP證030173號 <img src=//www.baidu.com/img/gs.gif> </p> </div> </div> </div> </body> </html>