用Filter解决乱码和jsp缓存问题-白红宇

用Filter解决乱码和jsp缓存问题

阅读量：5773 次

发布时间：2019-06-18

本文共 2109 字，大约阅读时间需要 7 分钟。

1) 乱码Filter:

新建一个：CharSetFilter

package com.my.filter;import java.io.*;import javax.servlet.*;import javax.servlet.http.*;import javax.servlet.Filter;import javax.servlet.FilterChain;import javax.servlet.FilterConfig;public class CharSetFilter implements Filter {    public CharSetFilter() {}        public void init(FilterConfig config) throws ServletException {    }        public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain) throws IOException, ServletException {        HttpServletResponse response = (HttpServletResponse)resp;        HttpServletRequest request = (HttpServletRequest)req;        request.setCharacterEncoding("utf-8");        response.setCharacterEncoding("utf-8");        response.setContentType("text/html;charset=\"utf-8\"");        chain.doFilter(request,response);    }        public void destroy() {    }}

修改web.xml


             
      
       charsetFilter
              
      
       com.my.filter.CharSetFilter
          
         
             
      
       charsetFilter
              
      
       /*

2) JSP缓存问题：

新建一个：CacheFilter

package com.my.filter;import java.io.*;import javax.servlet.*;import javax.servlet.http.*;import javax.servlet.Filter;import javax.servlet.FilterChain;import javax.servlet.FilterConfig;public class CacheFilter implements Filter {    public CacheFilter() {}        public void init(FilterConfig config) throws ServletException {    }        public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain) throws IOException, ServletException {        HttpServletResponse response = (HttpServletResponse)resp;        HttpServletRequest request = (HttpServletRequest)req;        response.setDateHeader("Expires",-1);        response.setHeader("Cache-Control","no-cache");        response.setHeader("Pragma","no-cache");        chain.doFilter(request, response);    }        public void destroy() {    }}

修改web.xml


             
      
       cahceFilter
              
      
       com.my.filter.CacheFilter
          
         
             
      
       cahceFilter
              
      
       *.jsp