jsp过滤器简写

package com.pan.encod;
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 EncodFilter implements Filter {
 public void destroy() {
  
 }
 public void doFilter(ServletRequest arg0, ServletResponse arg1,
   FilterChain arg2) throws IOException, ServletException {
  
  arg0.setCharacterEncoding("GB2312");
  arg1.setCharacterEncoding("GB2312");
  arg2.doFilter(arg0, arg1);
 }
 public void init(FilterConfig arg0) throws ServletException {
  
 }
}