useraccess.java

房产交易平台 服务器端建议代码。工厂模型。

package com.fc.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 com.fc.dao.User;

public class UserAccess implements Filter {

	public void destroy() {
		// TODO Auto-generated method stub

	}

	public void doFilter(ServletRequest arg0, ServletResponse arg1,
			FilterChain arg2) throws IOException, ServletException {

		HttpServletRequest req = (HttpServletRequest) arg0;
		User u = (User) (req.getSession().getAttribute("user"));
		HttpServletResponse res = (HttpServletResponse) arg1;
		if (u == null) {
			res.sendRedirect(req.getContextPath()
					+ "/user/erro.jsp?msg=illigel access!");
		}else{
			arg2.doFilter(arg0, arg1);
		}
	}

	public void init(FilterConfig arg0) throws ServletException {
		// TODO Auto-generated method stub

	}

}