HTML页面实现全方位页面缓存_html/css_WEB-ITnose-html教程-PHP中文网

HTML页面实现全方位页面缓存_html/css_WEB-ITnose

php中文网

发布： 2016-06-24 11:57:55

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【1】服务端配置一个filter，实现对js、css和image的缓存

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package cn.com.system.filter;import java.io.IOException;import java.util.Enumeration;import javax.servlet.FilterChain;import javax.servlet.FilterConfig;import javax.servlet.ServletException;import javax.servlet.ServletRequest;import javax.servlet.ServletResponse;import javax.servlet.http.HttpServletResponse;public class CacheForWeekFilter {	private FilterConfig fc;	public void doFilter(ServletRequest req, ServletResponse res,			FilterChain chain) throws IOException, ServletException {		HttpServletResponse response = (HttpServletResponse) res;		for (Enumeration e = fc.getInitParameterNames(); e.hasMoreElements();) {			String headerName = (String) e.nextElement();			response.addHeader(headerName, fc.getInitParameter(headerName));		}		chain.doFilter(req, response);	}	public void init(FilterConfig filterConfig) {		this.fc = filterConfig;	}	public void destroy() {		this.fc = null;	}}

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web.xml配置

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<filter>          <filter-name>CacheForWeek</filter-name>          <filter-class>cn.com.system.filter.CacheForWeekFilter</filter-class>          <init-param>              <param-name>Cache-Control</param-name>              <param-value>max-age=604800, public</param-value>          </init-param>      </filter>     <filter-mapping>          <filter-name>CacheForWeek</filter-name>          <url-pattern>/js/</url-pattern>      </filter-mapping>      <filter-mapping>          <filter-name>CacheForWeek</filter-name>          <url-pattern>/images/</url-pattern>      </filter-mapping>      <filter-mapping>          <filter-name>CacheForWeek</filter-name>          <url-pattern>/css/</url-pattern>      </filter-mapping>

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完成这一步，在服务端已经实现了对页面的缓存，但是当前情况下页面还是会每次访问服务器的，只是压力减小了

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如何让页面在一段时间内不访问服务器呢

实现方式是对应公用的JS都放到一个页面中，别的页面包含他，在这个页面中增加页面缓存

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<%@ page language="java" pageEncoding="UTF-8"%><meta charset="utf-8" /><span style="color:#ff0000;"><meta http-equiv="cache-control" content="max-age=604800, public"></span><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><!--IE10--><meta http-equiv="X-UA-Compatible" content="IE=EmulateIE8" /><!--<meta name=”renderer” content=”webkit|ie-comp|ie-stand”>--><meta name=”renderer” content=”webkit|ie-comp|ie-stand” /><!-- CSS styles --><link rel="stylesheet" type="text/css" href="${pageContext.request.contextPath}/css/base.css" /><script src="${pageContext.request.contextPath}/common/jquery/js/jquery-1.8.2.js" charset="utf-8"></script><script src="${pageContext.request.contextPath}/common/jquery/js/jquery.ui.core.js" charset="utf-8"></script>

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