1、SetCharacterEncoding.java

package com.servlet; 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; public class SetCharacterEncoding implements Filter{
   protected FilterConfig filterConfig = null; protected String encoding = null; public void init(FilterConfig filterConfig)throws ServletException{
   this.filterConfig = filterConfig ; this.encoding = filterConfig.getInitParameter("encoding"); } public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException , ServletException {
      String encoding=this.encoding; if(encoding != null){
       request.setCharacterEncoding(encoding);     response.setCharacterEncoding(encoding);    }    chain.doFilter(request, response); } public void destroy() {
   this.encoding = null; this.filterConfig = null; } }

2、web.xml

      
      
       EncodingFilter
       
      
       com.servlet.SetCharacterEncoding
       
       
       
        encoding
        
       
        UTF-8
        
       
      
      
      
       EncodingFilter
       
      
       /*