万能过滤器

package com.newer.filter;

 

import java.io.IOException;

import java.util.Iterator;

import java.util.Map;

 

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.HttpServletRequest;

 

public class EcodeFilter implements Filter {

 

@Override

public void destroy() {

// TODO Auto-generated method stub

 

}

 

@Override

public void doFilter(ServletRequest arg0, ServletResponse arg1,

FilterChain arg2) throws IOException, ServletException {

// TODO Auto-generated method stub

HttpServletRequest request =(HttpServletRequest)arg0;

if(request.getMethod().equalsIgnoreCase("get")){

Map map=request.getParameterMap();

Iterator it=map.values().iterator();

while(it.hasNext()){

 String[]str=(String[])it.next();

              for(int i=0;i<str.length;i++){

              str[i]=new String(str[i].getBytes("iso-8859-1"),"utf-8");

              }

}

}else{

arg0.setCharacterEncoding("UTF-8");

}

arg2.doFilter(arg0, arg1);

}

 

@Override

public void init(FilterConfig arg0) throws ServletException {

// TODO Auto-generated method stub

 

}

 

}