代理服务器的缓存问题

如果要使用代理服务器时，会出现页面信息串。
处理方法(写一个过滤器来禁止缓存)

package com.guzhi;

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.HttpServletResponse;

public class NoCachingFilter implements Filter {

private FilterConfig filterConfig ;

public void destroy() {
// TODO Auto-generated method stub

}


public void doFilter(ServletRequest arg0, ServletResponse arg1,
FilterChain arg2) throws IOException, ServletException {
HttpServletResponse httpResponse=(HttpServletResponse)arg1;
        httpResponse.setHeader( "Cache-Control ", "no-cache ");
        httpResponse.setDateHeader( "Expires ",0);
        httpResponse.setHeader( "Pragma ", "No-cache ");
        arg2.doFilter(arg0,arg1);
}

public void init(FilterConfig arg0) throws ServletException {
this.filterConfig=arg0;
}

}

配置文件
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
    <filter-name>filters</filter-name>
    <filter-class>com.guzhi.NoCachingFilter</filter-class>
    </filter>
    <filter-mapping>
       <filter-name>filters</filter-name>
       <url-pattern>/*</url-pattern>
    </filter-mapping>
</web-app>
//将缓存修改为其他方式
http://xingba.iteye.com/blog/294165