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Appfuse2学习笔记--GzipFilter的应用

阅读更多
AppFuse中经过分析使用了大量的开源框架和组件。个人认为整个后台还不是强大,可能与它的定位有关联。我们在项目中积累了大量的Spring以及Hibernate应用都要比之要强很多。但appFuse的前台整合还是相当不错的。先学一个gzipFilter
gzipFilter其实就位于eHcache里面,他是将response中的东东都压缩一下,这个可大大减少了传输时间。
配置web.xml
<filter>
		<filter-name>gzipFilter</filter-name>
		<filter-class>
			net.sf.ehcache.constructs.web.filter.GzipFilter
		</filter-class>
	</filter>
<filter-mapping>
		<filter-name>gzipFilter</filter-name>
		<url-pattern>*.css</url-pattern>
	</filter-mapping>
	<filter-mapping>
		<filter-name>gzipFilter</filter-name>
		<url-pattern>*.png</url-pattern>
	</filter-mapping>
	<filter-mapping>
		<filter-name>gzipFilter</filter-name>
		<url-pattern>*.gif</url-pattern>
	</filter-mapping>
	<filter-mapping>
		<filter-name>gzipFilter</filter-name>
		<url-pattern>*.html</url-pattern>
	</filter-mapping>
	<filter-mapping>
		<filter-name>gzipFilter</filter-name>
		<url-pattern>*.jsp</url-pattern>
	</filter-mapping>
	<filter-mapping>
		<filter-name>gzipFilter</filter-name>
		<url-pattern>*.js</url-pattern>
	</filter-mapping>
	<filter-mapping>
		<filter-name>gzipFilter</filter-name>
		<url-pattern>*.json</url-pattern>
	</filter-mapping>


效果,你可以用FoxFire的net看各个css,js文件可是压缩50%以上哦。
写了一个jsp文件专门评估
<%@ page language="java" import="java.util.*,java.net.*,java.io.*"
	pageEncoding="ISO-8859-1"%>
<%
	String path = request.getContextPath();
	String basePath = request.getScheme() + "://"
			+ request.getServerName() + ":" + request.getServerPort()
			+ path + "/";
%>
<%
	String url = request.getParameter("url");
	if (url != null) {
		URL noCompress = new URL(url);
		HttpURLConnection huc = (HttpURLConnection) noCompress
				.openConnection();
		huc.setRequestProperty("user-agent", "Mozilla(MSIE)");
		huc.connect();
		ByteArrayOutputStream baos = new ByteArrayOutputStream();
		InputStream is = huc.getInputStream();
		while (is.read() != -1) {
			baos.write((byte) is.read());
		}
		byte[] b1 = baos.toByteArray();

		URL compress = new URL(url);
		HttpURLConnection hucCompress = (HttpURLConnection) noCompress
				.openConnection();
		hucCompress.setRequestProperty("accept-encoding", "gzip");
		hucCompress.setRequestProperty("user-agent", "Mozilla(MSIE)");
		hucCompress.connect();
		ByteArrayOutputStream baosCompress = new ByteArrayOutputStream();
		InputStream isCompress = hucCompress.getInputStream();
		while (isCompress.read() != -1) {
			baosCompress.write((byte) isCompress.read());
		}
		byte[] b2 = baosCompress.toByteArray();
		request.setAttribute("t1", new Integer(b1.length));
		request.setAttribute("t2", new Integer(b2.length));
		request.setAttribute("t3", (1 - new Double(b2.length)
				/ new Double(b1.length)) * 100);
	}
	request.setAttribute("url", url);
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
	<head>
		<base href="<%=basePath%>">

		<title>My JSP 'MyJsp.jsp' starting page</title>

		<meta http-equiv="pragma" content="no-cache">
		<meta http-equiv="cache-control" content="no-cache">
		<meta http-equiv="expires" content="0">
		<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
		<meta http-equiv="description" content="This is my page">
		<!--
	<link rel="stylesheet" type="text/css" href="styles.css">
	-->

	</head>

	<body>
		This is my JSP page.
		<br>
		<h1>
			Compression Test
		</h1>
		Enter a URL to test.
		<form method="POST">
			<input name="url" size="50">
			<input type="submit" value="Check URL">
		</form>
		<p>
			<%=url%>
			<b>Testing: ${url}</b>
		</p>
		Request 1: ${t1} bytes
		<%=request.getAttribute("t1")%>
		<br />
		Request 2: ${t2} bytes
		<%=request.getAttribute("t2")%>
		<br />
		Space saved: ${t1-t2} bytes or ${(1-t2/t1)*100}%
		<%=request.getAttribute("t3")%>%
		<br />
	</body>
</html>

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评论
3 楼 erichua 2008-10-10  
我的理解是tomcat等应用服务器是对所有网站内容都进行压缩。而用应用程序可以选择性的进行,更多一些灵活性吧。其实效果是一样的。在应用程序中更灵活一些。

heyosi 写道

erichua 写道AppFuse中经过分析使用了大量的开源框架和组件。个人认为整个后台还不是强大,可能与它的定位有关联。我们在项目中积累了大量的Spring以及Hibernate应用都要比之要强很多。但appFuse的前台整合还是相当不错的。先学一个gzipFilter
gzipFilter其实就位于eHcache里面,他是将response中的东东都压缩一下,这个可大大减少了传输时间。
配置web.xml
Java代码 &lt;filter&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;filter-name&gt;gzipFilter&lt;/filter-name&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;filter-class&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;net.sf.ehcache.constructs.web.filter.GzipFilter&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;/filter-class&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;/filter&gt;&nbsp;&nbsp;&lt;filter-mapping&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;filter-name&gt;gzipFilter&lt;/filter-name&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;url-pattern&gt;*.css&lt;/url-pattern&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;/filter-mapping&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;filter-mapping&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;filter-name&gt;gzipFilter&lt;/filter-name&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;url-pattern&gt;*.png&lt;/url-pattern&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;/filter-mapping&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;filter-mapping&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;filter-name&gt;gzipFilter&lt;/filter-name&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;url-pattern&gt;*.gif&lt;/url-pattern&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;/filter-mapping&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;filter-mapping&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;filter-name&gt;gzipFilter&lt;/filter-name&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;url-pattern&gt;*.html&lt;/url-pattern&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;/filter-mapping&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;filter-mapping&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;filter-name&gt;gzipFilter&lt;/filter-name&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;url-pattern&gt;*.jsp&lt;/url-pattern&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;/filter-mapping&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;filter-mapping&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;filter-name&gt;gzipFilter&lt;/filter-name&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;url-pattern&gt;*.js&lt;/url-pattern&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;/filter-mapping&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;filter-mapping&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;filter-name&gt;gzipFilter&lt;/filter-name&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;url-pattern&gt;*.json&lt;/url-pattern&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;/filter-mapping&gt;&nbsp;&nbsp;&lt;filter&gt;
&lt;filter-name&gt;gzipFilter&lt;/filter-name&gt;
&lt;filter-class&gt;
net.sf.ehcache.constructs.web.filter.GzipFilter
&lt;/filter-class&gt;
&lt;/filter&gt;
&lt;filter-mapping&gt;
&lt;filter-name&gt;gzipFilter&lt;/filter-name&gt;
&lt;url-pattern&gt;*.css&lt;/url-pattern&gt;
&lt;/filter-mapping&gt;
&lt;filter-mapping&gt;
&lt;filter-name&gt;gzipFilter&lt;/filter-name&gt;
&lt;url-pattern&gt;*.png&lt;/url-pattern&gt;
&lt;/filter-mapping&gt;
&lt;filter-mapping&gt;
&lt;filter-name&gt;gzipFilter&lt;/filter-name&gt;
&lt;url-pattern&gt;*.gif&lt;/url-pattern&gt;
&lt;/filter-mapping&gt;
&lt;filter-mapping&gt;
&lt;filter-name&gt;gzipFilter&lt;/filter-name&gt;
&lt;url-pattern&gt;*.html&lt;/url-pattern&gt;
&lt;/filter-mapping&gt;
&lt;filter-mapping&gt;
&lt;filter-name&gt;gzipFilter&lt;/filter-name&gt;
&lt;url-pattern&gt;*.jsp&lt;/url-pattern&gt;
&lt;/filter-mapping&gt;
&lt;filter-mapping&gt;
&lt;filter-name&gt;gzipFilter&lt;/filter-name&gt;
&lt;url-pattern&gt;*.js&lt;/url-pattern&gt;
&lt;/filter-mapping&gt;
&lt;filter-mapping&gt;
&lt;filter-name&gt;gzipFilter&lt;/filter-name&gt;
&lt;url-pattern&gt;*.json&lt;/url-pattern&gt;
&lt;/filter-mapping&gt;


效果,你可以用FoxFire的net看各个css,js文件可是压缩50%以上哦。
写了一个jsp文件专门评估
Java代码 &lt;%@&nbsp;page&nbsp;language="java"&nbsp;import="java.util.*,java.net.*,java.io.*"&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;pageEncoding="ISO-8859-1"%&gt;&nbsp;&nbsp;&lt;%&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;String&nbsp;path&nbsp;=&nbsp;request.getContextPath();&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;String&nbsp;basePath&nbsp;=&nbsp;request.getScheme()&nbsp;+&nbsp;"://"&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;+&nbsp;request.getServerName()&nbsp;+&nbsp;":"&nbsp;+&nbsp;request.getServerPort()&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;+&nbsp;path&nbsp;+&nbsp;"/";&nbsp;&nbsp;%&gt;&nbsp;&nbsp;&lt;%&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;String&nbsp;url&nbsp;=&nbsp;request.getParameter("url");&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if&nbsp;(url&nbsp;!=&nbsp;null)&nbsp;{&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;URL&nbsp;noCompress&nbsp;=&nbsp;new&nbsp;URL(url);&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;HttpURLConnection&nbsp;huc&nbsp;=&nbsp;(HttpURLConnection)&nbsp;noCompress&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.openConnection();&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;huc.setRequestProperty("user-agent",&nbsp;"Mozilla(MSIE)");&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;huc.connect();&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;ByteArrayOutputStream&nbsp;baos&nbsp;=&nbsp;new&nbsp;ByteArrayOutputStream();&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;InputStream&nbsp;is&nbsp;=&nbsp;huc.getInputStream();&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;while&nbsp;(is.read()&nbsp;!=&nbsp;-1)&nbsp;{&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;baos.write((byte)&nbsp;is.read());&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;byte[]&nbsp;b1&nbsp;=&nbsp;baos.toByteArray();&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;URL&nbsp;compress&nbsp;=&nbsp;new&nbsp;URL(url);&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;HttpURLConnection&nbsp;hucCompress&nbsp;=&nbsp;(HttpURLConnection)&nbsp;noCompress&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.openConnection();&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;hucCompress.setRequestProperty("accept-encoding",&nbsp;"gzip");&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;hucCompress.setRequestProperty("user-agent",&nbsp;"Mozilla(MSIE)");&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;hucCompress.connect();&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;ByteArrayOutputStream&nbsp;baosCompress&nbsp;=&nbsp;new&nbsp;ByteArrayOutputStream();&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;InputStream&nbsp;isCompress&nbsp;=&nbsp;hucCompress.getInputStream();&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;while&nbsp;(isCompress.read()&nbsp;!=&nbsp;-1)&nbsp;{&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;baosCompress.write((byte)&nbsp;isCompress.read());&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;byte[]&nbsp;b2&nbsp;=&nbsp;baosCompress.toByteArray();&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;request.setAttribute("t1",&nbsp;new&nbsp;Integer(b1.length));&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;request.setAttribute("t2",&nbsp;new&nbsp;Integer(b2.length));&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;request.setAttribute("t3",&nbsp;(1&nbsp;-&nbsp;new&nbsp;Double(b2.length)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;/&nbsp;new&nbsp;Double(b1.length))&nbsp;*&nbsp;100);&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;request.setAttribute("url",&nbsp;url);&nbsp;&nbsp;%&gt;&nbsp;&nbsp;&lt;!DOCTYPE&nbsp;HTML&nbsp;PUBLIC&nbsp;"-//W3C//DTD&nbsp;HTML&nbsp;4.01&nbsp;Transitional//EN"&gt;&nbsp;&nbsp;&lt;html&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;head&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;base&nbsp;href="&lt;%=basePath%&gt;"&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;title&gt;My&nbsp;JSP&nbsp;'MyJsp.jsp'&nbsp;starting&nbsp;page&lt;/title&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;meta&nbsp;http-equiv="pragma"&nbsp;content="no-cache"&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;meta&nbsp;http-equiv="cache-control"&nbsp;content="no-cache"&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;meta&nbsp;http-equiv="expires"&nbsp;content="0"&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;meta&nbsp;http-equiv="keywords"&nbsp;content="keyword1,keyword2,keyword3"&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;meta&nbsp;http-equiv="description"&nbsp;content="This&nbsp;is&nbsp;my&nbsp;page"&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;!--&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;link&nbsp;rel="stylesheet"&nbsp;type="text/css"&nbsp;href="styles.css"&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;--&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;/head&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;body&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This&nbsp;is&nbsp;my&nbsp;JSP&nbsp;page.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;br&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;h1&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Compression&nbsp;Test&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;/h1&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Enter&nbsp;a&nbsp;URL&nbsp;to&nbsp;test.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;form&nbsp;method="POST"&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;input&nbsp;name="url"&nbsp;size="50"&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;input&nbsp;type="submit"&nbsp;value="Check&nbsp;URL"&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;/form&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;p&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;%=url%&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;b&gt;Testing:&nbsp;${url}&lt;/b&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;/p&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Request&nbsp;1:&nbsp;${t1}&nbsp;bytes&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;%=request.getAttribute("t1")%&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;br&nbsp;/&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Request&nbsp;2:&nbsp;${t2}&nbsp;bytes&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;%=request.getAttribute("t2")%&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;br&nbsp;/&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Space&nbsp;saved:&nbsp;${t1-t2}&nbsp;bytes&nbsp;or&nbsp;${(1-t2/t1)*100}%&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;%=request.getAttribute("t3")%&gt;%&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;br&nbsp;/&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;/body&gt;&nbsp;&nbsp;&lt;/html&gt;&nbsp;&nbsp;&lt;%@ page language="java" import="java.util.*,java.net.*,java.io.*"
pageEncoding="ISO-8859-1"%&gt;
&lt;%
String path = request.getContextPath();
String basePath = request.getScheme() + "://"
+ request.getServerName() + ":" + request.getServerPort()
+ path + "/";
%&gt;
&lt;%
String url = request.getParameter("url");
if (url != null) {
URL noCompress = new URL(url);
HttpURLConnection huc = (HttpURLConnection) noCompress
.openConnection();
huc.setRequestProperty("user-agent", "Mozilla(MSIE)");
huc.connect();
ByteArrayOutputStream baos = new ByteArrayOutputStream();
InputStream is = huc.getInputStream();
while (is.read() != -1) {
baos.write((byte) is.read());
}
byte[] b1 = baos.toByteArray();

URL compress = new URL(url);
HttpURLConnection hucCompress = (HttpURLConnection) noCompress
.openConnection();
hucCompress.setRequestProperty("accept-encoding", "gzip");
hucCompress.setRequestProperty("user-agent", "Mozilla(MSIE)");
hucCompress.connect();
ByteArrayOutputStream baosCompress = new ByteArrayOutputStream();
InputStream isCompress = hucCompress.getInputStream();
while (isCompress.read() != -1) {
baosCompress.write((byte) isCompress.read());
}
byte[] b2 = baosCompress.toByteArray();
request.setAttribute("t1", new Integer(b1.length));
request.setAttribute("t2", new Integer(b2.length));
request.setAttribute("t3", (1 - new Double(b2.length)
/ new Double(b1.length)) * 100);
}
request.setAttribute("url", url);
%&gt;
&lt;!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"&gt;
&lt;html&gt;
&lt;head&gt;
&lt;base href="&lt;%=basePath%&gt;"&gt;

&lt;title&gt;My JSP 'MyJsp.jsp' starting page&lt;/title&gt;

&lt;meta http-equiv="pragma" content="no-cache"&gt;
&lt;meta http-equiv="cache-control" content="no-cache"&gt;
&lt;meta http-equiv="expires" content="0"&gt;
&lt;meta http-equiv="keywords" content="keyword1,keyword2,keyword3"&gt;
&lt;meta http-equiv="description" content="This is my page"&gt;
&lt;!--
&lt;link rel="stylesheet" type="text/css" href="styles.css"&gt;
--&gt;

&lt;/head&gt;

&lt;body&gt;
This is my JSP page.
&lt;br&gt;
&lt;h1&gt;
Compression Test
&lt;/h1&gt;
Enter a URL to test.
&lt;form method="POST"&gt;
&lt;input name="url" size="50"&gt;
&lt;input type="submit" value="Check URL"&gt;
&lt;/form&gt;
&lt;p&gt;
&lt;%=url%&gt;
&lt;b&gt;Testing: ${url}&lt;/b&gt;
&lt;/p&gt;
Request 1: ${t1} bytes
&lt;%=request.getAttribute("t1")%&gt;
&lt;br /&gt;
Request 2: ${t2} bytes
&lt;%=request.getAttribute("t2")%&gt;
&lt;br /&gt;
Space saved: ${t1-t2} bytes or ${(1-t2/t1)*100}%
&lt;%=request.getAttribute("t3")%&gt;%
&lt;br /&gt;
&lt;/body&gt;
&lt;/html&gt;

应用服务器应该都支持压缩吧,weblogic和tomcat都可以,在app中实现有什么好处呢?不会增加复杂性和出错的概率吗?

2 楼 erichua 2008-10-10  
我的理解是tomcat等应用服务器是对所有网站内容都进行压缩。而用应用程序可以选择性的进行,更多一些灵活性吧。其实效果是一样的。在应用程序中更灵活一些。
1 楼 heyosi 2008-10-07  
erichua 写道
AppFuse中经过分析使用了大量的开源框架和组件。个人认为整个后台还不是强大,可能与它的定位有关联。我们在项目中积累了大量的Spring以及Hibernate应用都要比之要强很多。但appFuse的前台整合还是相当不错的。先学一个gzipFilter
gzipFilter其实就位于eHcache里面,他是将response中的东东都压缩一下,这个可大大减少了传输时间。
配置web.xml
<filter>
		<filter-name>gzipFilter</filter-name>
		<filter-class>
			net.sf.ehcache.constructs.web.filter.GzipFilter
		</filter-class>
	</filter>
<filter-mapping>
		<filter-name>gzipFilter</filter-name>
		<url-pattern>*.css</url-pattern>
	</filter-mapping>
	<filter-mapping>
		<filter-name>gzipFilter</filter-name>
		<url-pattern>*.png</url-pattern>
	</filter-mapping>
	<filter-mapping>
		<filter-name>gzipFilter</filter-name>
		<url-pattern>*.gif</url-pattern>
	</filter-mapping>
	<filter-mapping>
		<filter-name>gzipFilter</filter-name>
		<url-pattern>*.html</url-pattern>
	</filter-mapping>
	<filter-mapping>
		<filter-name>gzipFilter</filter-name>
		<url-pattern>*.jsp</url-pattern>
	</filter-mapping>
	<filter-mapping>
		<filter-name>gzipFilter</filter-name>
		<url-pattern>*.js</url-pattern>
	</filter-mapping>
	<filter-mapping>
		<filter-name>gzipFilter</filter-name>
		<url-pattern>*.json</url-pattern>
	</filter-mapping>


效果,你可以用FoxFire的net看各个css,js文件可是压缩50%以上哦。
写了一个jsp文件专门评估
<%@ page language="java" import="java.util.*,java.net.*,java.io.*"
	pageEncoding="ISO-8859-1"%>
<%
	String path = request.getContextPath();
	String basePath = request.getScheme() + "://"
			+ request.getServerName() + ":" + request.getServerPort()
			+ path + "/";
%>
<%
	String url = request.getParameter("url");
	if (url != null) {
		URL noCompress = new URL(url);
		HttpURLConnection huc = (HttpURLConnection) noCompress
				.openConnection();
		huc.setRequestProperty("user-agent", "Mozilla(MSIE)");
		huc.connect();
		ByteArrayOutputStream baos = new ByteArrayOutputStream();
		InputStream is = huc.getInputStream();
		while (is.read() != -1) {
			baos.write((byte) is.read());
		}
		byte[] b1 = baos.toByteArray();

		URL compress = new URL(url);
		HttpURLConnection hucCompress = (HttpURLConnection) noCompress
				.openConnection();
		hucCompress.setRequestProperty("accept-encoding", "gzip");
		hucCompress.setRequestProperty("user-agent", "Mozilla(MSIE)");
		hucCompress.connect();
		ByteArrayOutputStream baosCompress = new ByteArrayOutputStream();
		InputStream isCompress = hucCompress.getInputStream();
		while (isCompress.read() != -1) {
			baosCompress.write((byte) isCompress.read());
		}
		byte[] b2 = baosCompress.toByteArray();
		request.setAttribute("t1", new Integer(b1.length));
		request.setAttribute("t2", new Integer(b2.length));
		request.setAttribute("t3", (1 - new Double(b2.length)
				/ new Double(b1.length)) * 100);
	}
	request.setAttribute("url", url);
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
	<head>
		<base href="<%=basePath%>">

		<title>My JSP 'MyJsp.jsp' starting page</title>

		<meta http-equiv="pragma" content="no-cache">
		<meta http-equiv="cache-control" content="no-cache">
		<meta http-equiv="expires" content="0">
		<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
		<meta http-equiv="description" content="This is my page">
		<!--
	<link rel="stylesheet" type="text/css" href="styles.css">
	-->

	</head>

	<body>
		This is my JSP page.
		<br>
		<h1>
			Compression Test
		</h1>
		Enter a URL to test.
		<form method="POST">
			<input name="url" size="50">
			<input type="submit" value="Check URL">
		</form>
		<p>
			<%=url%>
			<b>Testing: ${url}</b>
		</p>
		Request 1: ${t1} bytes
		<%=request.getAttribute("t1")%>
		<br />
		Request 2: ${t2} bytes
		<%=request.getAttribute("t2")%>
		<br />
		Space saved: ${t1-t2} bytes or ${(1-t2/t1)*100}%
		<%=request.getAttribute("t3")%>%
		<br />
	</body>
</html>


应用服务器应该都支持压缩吧,weblogic和tomcat都可以,在app中实现有什么好处呢?不会增加复杂性和出错的概率吗?

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