characterencodingfilter.java

这是一个购物车的源码

package com.tarena.shoppingcart.util;
/**
 *   编码过滤器  将页面内容传到数据库
 */

import java.io.*;

import javax.servlet.*;
public class CharacterEncodingFilter implements Filter{

	String encoding=null;
	FilterConfig config =null;
	public void destroy() {
		// TODO Auto-generated method stub
		encoding=null;
		config=null;
	}

	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
		// TODO Auto-generated method stub
		if(encoding!=null){
			request.setCharacterEncoding(encoding);
		}
			chain.doFilter(request, response);
	}

	public void init(FilterConfig config) throws ServletException {
		// TODO Auto-generated method stub
		this.config=config;
		encoding=config.getInitParameter("encoding");
	}
	
}