2018-03-04 Filter类(二):实现全站禁止缓存

笔记如下

• web.xml
  作用全.jsp页面

<filter>
    <filter-name>NoCacheFilter</filter-name>
    <filter-class>com.chen.demo2.NoCacheFilter</filter-class>
  </filter>
  <filter-mapping>
    <filter-name>NoCacheFilter</filter-name>
    <url-pattern>*.jsp</url-pattern>
  </filter-mapping>

• NoCacheFilter

    //设置全站不缓存
    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
            throws IOException, ServletException {
        // TODO Auto-generated method stub
        
        HttpServletRequest request2 = (HttpServletRequest)request;
        HttpServletResponse response2 = (HttpServletResponse) response;
        
        response2.setHeader("cache-control", "no-cache");
        response2.setHeader("pragma", "no-cache");
        response2.setDateHeader("expires", 0);
        chain.doFilter(request2, response2);
        
    }