encodingfilter.java

电子商城

package com.lmh.filter;

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;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import com.lmh.Cart;

/**
 * @author Kenneth
 *
 */
public class EncodingFilter implements Filter {


	public void destroy() {

	}

	public void doFilter(ServletRequest req, ServletResponse res,
			FilterChain chain) throws IOException, ServletException {
		HttpServletRequest request=(HttpServletRequest)req;
		HttpServletResponse response=(HttpServletResponse)res;
		
		request.setCharacterEncoding("GBK");
		response.setCharacterEncoding("GBK");

		HttpSession session = request.getSession();
		Cart cart = (Cart) session.getAttribute("cart");
		if (cart == null) {
			cart = new Cart();
		}
		session.setAttribute("cart", cart);
		
		
		chain.doFilter(request,response);
	}

	public void init(FilterConfig arg0) throws ServletException {

	}

	
}