handleexit.java

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package myservlet.control;
import mybean.data.*;
import java.sql.*;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class HandleExit extends HttpServlet
{
	public void init(ServletConfig config) throws ServletException
    {
		super.init(config);
    }
   public String handleString(String s)
   {
	   try
	   {
		   byte bb[]=s.getBytes("iso-8859-1");
           s=new String(bb);
       }
       catch(Exception ee){} 
       return s;  
   }
   public void doPost(HttpServletRequest request,HttpServletResponse response) throws ServletException,IOException
    {
	   HttpSession session=request.getSession(true); 
       Login login=(Login)session.getAttribute("login"); //获取用户登录时的Javabean
       boolean ok=true; 
       if(login==null)
       { ok=false; 
         response.sendRedirect("login.jsp");             //重定向到登录页面
       }
       if(ok==true)
       {  continueDoPost(request,response);
       }
    }
   public void continueDoPost(HttpServletRequest request,HttpServletResponse response) throws ServletException,IOException
    {   HttpSession session=request.getSession(true); 
        session.invalidate();              //销毁用户的session对象
        response.sendRedirect("index.jsp"); //返回主页   
    }
   public  void  doGet(HttpServletRequest request,HttpServletResponse response) throws ServletException,IOException
    {   doPost(request,response);
    }
}