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控制动态资源(Servlet JSP)不要缓存的过滤器

2015-07-07 23:29 786 查看
2014年9月8日16:03:33动态资源（Jsp、Servlet等资源）：为保证动态信息的时效性，动态资源不应该进行缓存，而应该时刻进行更新！
//控制动态资源(ServletJSP)不要缓存的过滤器
        
packagecn.itcast.filter.example;
 
importjava.io.IOException;
 
importjavax.servlet.Filter;
importjavax.servlet.FilterChain;
importjavax.servlet.FilterConfig;
importjavax.servlet.ServletException;
importjavax.servlet.ServletRequest;
importjavax.servlet.ServletResponse;
importjavax.servlet.http.HttpServletRequest;
importjavax.servlet.http.HttpServletResponse;
 
//控制动态资源(ServletJSP)不要缓存的过滤器
 
/*
过滤器的配置：
 
<filter>
<filter-name>NoCacheFilter</filter-name>
<filter-class>cn.itcast.filter.example.NoCacheFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>NoCacheFilter</filter-name>
<url-pattern>*.jsp</url-pattern>
</filter-mapping>
<filter-mapping>
<filter-name>NoCacheFilter</filter-name>
<url-pattern>/servlet/*</url-pattern>
</filter-mapping>
*/
publicclassNoCacheFilterimplementsFilter{
 
	publicvoiddestroy(){
 
}
 
	publicvoiddoFilter(ServletRequestreq,ServletResponseresp,
	FilterChainchain)throwsIOException,ServletException{
HttpServletRequestrequest=(HttpServletRequest)req;
HttpServletResponseresponse=(HttpServletResponse)resp;
response.setHeader("Expires","-1");
response.setHeader("Cache-Control","no-cache");
response.setHeader("Pragma","no-cache");
chain.doFilter(request,response);
}
 
	publicvoidinit(FilterConfigfilterConfig)throwsServletException{
}
 
}
//数据回显Servlet      
packagecn.itcast.servlet;
 
importjava.io.IOException;
importjava.io.PrintWriter;
 
importjavax.servlet.ServletException;
importjavax.servlet.http.HttpServlet;
importjavax.servlet.http.HttpServletRequest;
importjavax.servlet.http.HttpServletResponse;
 
publicclassServletDemo2extendsHttpServlet{
 
	publicvoiddoGet(HttpServletRequestrequest,HttpServletResponseresponse)
	throwsServletException,IOException{
//拿到请求参数
Stringname=request.getParameter("name");
//把拿到的请求参数打印到界面上
PrintWriterout=response.getWriter();
out.write(name);
}
 
	publicvoiddoPost(HttpServletRequestrequest,HttpServletResponseresponse)
	throwsServletException,IOException{
 
doGet(request,response);
}
 
}
2014年9月8日16:03:33动态资源（Jsp、Servlet等资源）：为保证动态信息的时效性，动态资源不应该进行缓存，而应该时刻进行更新！
//控制动态资源(ServletJSP)不要缓存的过滤器
        
packagecn.itcast.filter.example;
 
importjava.io.IOException;
 
importjavax.servlet.Filter;
importjavax.servlet.FilterChain;
importjavax.servlet.FilterConfig;
importjavax.servlet.ServletException;
importjavax.servlet.ServletRequest;
importjavax.servlet.ServletResponse;
importjavax.servlet.http.HttpServletRequest;
importjavax.servlet.http.HttpServletResponse;
 
//控制动态资源(ServletJSP)不要缓存的过滤器
 
/*
过滤器的配置：
 
<filter>
<filter-name>NoCacheFilter</filter-name>
<filter-class>cn.itcast.filter.example.NoCacheFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>NoCacheFilter</filter-name>
<url-pattern>*.jsp</url-pattern>
</filter-mapping>
<filter-mapping>
<filter-name>NoCacheFilter</filter-name>
<url-pattern>/servlet/*</url-pattern>
</filter-mapping>
*/
publicclassNoCacheFilterimplementsFilter{
 
	publicvoiddestroy(){
 
}
 
	publicvoiddoFilter(ServletRequestreq,ServletResponseresp,
	FilterChainchain)throwsIOException,ServletException{
HttpServletRequestrequest=(HttpServletRequest)req;
HttpServletResponseresponse=(HttpServletResponse)resp;
response.setHeader("Expires","-1");
response.setHeader("Cache-Control","no-cache");
response.setHeader("Pragma","no-cache");
chain.doFilter(request,response);
}
 
	publicvoidinit(FilterConfigfilterConfig)throwsServletException{
}
 
}
//数据回显Servlet      
packagecn.itcast.servlet;
 
importjava.io.IOException;
importjava.io.PrintWriter;
 
importjavax.servlet.ServletException;
importjavax.servlet.http.HttpServlet;
importjavax.servlet.http.HttpServletRequest;
importjavax.servlet.http.HttpServletResponse;
 
publicclassServletDemo2extendsHttpServlet{
 
	publicvoiddoGet(HttpServletRequestrequest,HttpServletResponseresponse)
	throwsServletException,IOException{
//拿到请求参数
Stringname=request.getParameter("name");
//把拿到的请求参数打印到界面上
PrintWriterout=response.getWriter();
out.write(name);
}
 
	publicvoiddoPost(HttpServletRequestrequest,HttpServletResponseresponse)
	throwsServletException,IOException{
 
doGet(request,response);
}
 
}

                                            

                                        

                        
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                         标签： 
                                                缓存
                                                互联网
                                                servlet
                                                JSP
                                                mvc
                                                

                        

                    


                

            


            

                
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