静态资源的缓存

静态资源的缓存

1.tomcat上面的方式

1. 在web.xml配置过滤器
   
   springSecurityFilterChain
   /*
   
   
   CacheFilter
   com.hand.hap.winShare.utils.EasyCacheFilter css 7 jpg 7 js 7 png 7 woff 7 woff2 7 ttf 7

CacheFilter *.jpg CacheFilter *.css CacheFilter *.js CacheFilter *.png CacheFilter *.ttf CacheFilter *.woff CacheFilter *.woff2 在写一个过滤器缓存数据 package com.hand.hap.winShare.utils;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**

• 一个简单的使用静态缓存的过滤器

• @author 鲁竹红
  */
  public class EasyCacheFilter implements Filter{
  private FilterConfig filterConfig;
  @Override
  public void init(FilterConfig filterConfig) throws ServletException {
  System.out.println("----过滤器初始化----");
  this.filterConfig = filterConfig;
  }

  //过滤器功能在这里实现
  @Override
  public void doFilter(ServletRequest req, ServletResponse resp,
  FilterChain chain) throws IOException, ServletException {
  HttpServletRequest request = (HttpServletRequest) req;
  HttpServletResponse response = (HttpServletResponse) resp;

   //1.获取用户想访问的资源
   String uri = request.getRequestURI(); 
   //2.得到用户想访问的资源的后缀名
   String ext = uri.substring(uri.lastIndexOf(".")+1); 
   //得到资源需要缓存的时间
   String time = filterConfig.getInitParameter(ext);
   if(time!=null){
       long t = Long.parseLong(time)*3600*1000*24;
       //设置浏览器缓存
       response.setDateHeader("expires", System.currentTimeMillis() + t);
       response.setHeader("Pragma","public");
       response.setHeader("Cache-Control","public");
   } 
   chain.doFilter(request, response);
  

  }

  @Override
  public void destroy() {
  System.out.println("----过滤器销毁----");
  }
  }

2. Nginx上面的方式

详情看http://blog.csdn.net/xyr05288/article/details/68928403
location ~ .(gif|jpg|png|htm|html|css|js|flv|ico|swf)(.*) {
proxy_pass http://cluster; #如果没有缓存则通过proxy_pass转向请求
proxy_redirect off;
proxy_set_header Host $host;
proxy_cache cache_one;
proxy_cache_valid 200 302 1h; #对不同的HTTP状态码设置不同的缓存时间,h小时,d天数
proxy_cache_valid 301 1d;
proxy_cache_valid any 1m;
expires 30d;
}