goodsvalidate.java

java web开发技术方案宝典

package com.yxq.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.RequestDispatcher;
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;

public class GoodsValidate implements Filter {
	private FilterConfig filterconfig=null;

	public void destroy() {
		filterconfig=null;
	}

	public void doFilter(ServletRequest Srequest,ServletResponse Sresponse,FilterChain chain) throws IOException, ServletException {
		HttpServletRequest request=(HttpServletRequest)Srequest;
		HttpServletResponse response=(HttpServletResponse)Sresponse;
		HttpSession session=request.getSession();
		RequestDispatcher rd=request.getRequestDispatcher("/pages/error.jsp");
		if(session.getAttribute("activity")==null)
			rd.forward(request,response);
		else
			chain.doFilter(request,response);
	}

	public void init(FilterConfig filterconfig) throws ServletException {
		this.filterconfig=filterconfig;
	}
}