java---GZIP壓縮技術演示(結合XML文件配置，網頁顯示)
阿新 • • 發佈：2019-02-09
<pre name="code" class="html">XML文件配置<servlet> <description>This is the description of my J2EE component</description> <display-name>This is the display name of my J2EE component</display-name> <servlet-name>GzipServlet</servlet-name> <servlet-class>cn.hncu.img.GzipServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>GzipServlet</servlet-name> <url-pattern>/gzip</url-pattern> </servlet-mapping>
</pre><pre code_snippet_id="1769887" snippet_file_name="blog_20160718_1_4654779" name="code" class="java">配合網頁 <pre name="code" class="html"><%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <script type="text/javascript"> <script type="text/javascript"> </script> </head> <body> <a href ="gzip">演示gzip</a> </body> </html>
package cn.hncu.img; import java.io.ByteArrayOutputStream; import java.io.IOException; import java.io.OutputStream; import java.util.zip.GZIPOutputStream; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; public class GzipServlet extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doPost(request,response); } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String str="sdjkjewjw資訊科學與工程學院kekw"; byte[] src = str.getBytes(); System.out.println("src-length:"+src.length); //把位元組陣列src中的資料 壓縮到 array記憶體流當中 ByteArrayOutputStream array = new ByteArrayOutputStream(); GZIPOutputStream gOut = new GZIPOutputStream(array); gOut.write(src); gOut.close(); //從記憶體流array中把壓縮後的資料拿出來 byte[] dest = array.toByteArray(); System.out.println("dest-length:"+dest.length); response.setContentType("text/html"); response.setHeader("Content-Encoding","gzip");//告訴瀏覽器，當前傳送的是gzip格式的內容 //response.setContentLength(dest.length);//設內容長度---法1 response.setHeader("Content-Length", ""+dest.length);//設內容長度---法2 OutputStream out = response.getOutputStream(); //out.write(src); out.write(dest); out.flush(); out.close(); } }