caigoujsppagefilter.java

自己写的一个java购销系统

package com.yuanjin.mtgx.action.filter;

import javax.servlet.*;
import javax.servlet.http.*;

import com.yuanjin.mtgx.entity.YongHu;

import java.io.*;

public class CaiGouJspPageFilter extends HttpFilter{  
	public void doFilter(HttpServletRequest request,
		                  HttpServletResponse response,
		                        FilterChain chain)throws ServletException, IOException{
	    String errorMassage=null;
		HttpSession session = request.getSession(false);
	    YongHu yh=(YongHu) session.getAttribute("yongHu");
	    if(yh == null){
	    	errorMassage="您还未登陆！";
	    	request.setAttribute("errorMassage", errorMassage);
	        request.getRequestDispatcher("/JSP-PAGE/errorpage.jsp").forward(request,response);
	        return;
	    }else if(!yh.getCzqx().equals("0")){
	    	errorMassage="你没有采购管理这一模块的使用权限！";
	    	request.setAttribute("errorMassage", errorMassage);
	        request.getRequestDispatcher("/JSP-PAGE/errorpage.jsp").forward(request,response);
	        return;
	    }
        chain.doFilter(request, response);
    }  
}