package com.tarena.shoppingcar.filter;

import java.io.IOException;

import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.tarena.shoppingcar.util.HttpFilter;

/**
 * 通用的字符集轉換的過濾器。 目標字符集通過初始化參數encoding指定，缺省為gbk。
 * 過濾器是否啟用通過初始化參數inuse(true)指定,，缺省為true。
 * 
 * @author Allan
 */
public class CharacterEncodingFilter extends HttpFilter {
	@Override
	public void doFilter(HttpServletRequest request,
			HttpServletResponse response, FilterChain chain)
			throws IOException, ServletException {
//		String inuse = getInitParameter("inuse");
//		if (inuse == null) {
//			inuse = "true";
//		}
//		if (inuse.equals("true")) {
//			String encoding = getInitParameter("encoding");
//			if (encoding == null) {
//				encoding = "gbk";
//			}
			request.setCharacterEncoding("gbk");
			response.setCharacterEncoding("gbk");
//		}
		chain.doFilter(request, response);
	}
}