userexit.java

基于JSP编程的网上书店系统,功能挺强的！可供课程设计或毕业设计的同学使用

/**
 * 该Servlet用于用户退出
 */
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;

public class UserExit extends HttpServlet{
	public void doGet(HttpServletRequest request, HttpServletResponse response) 
	throws ServletException, IOException{
		HttpSession session=request.getSession();
		String toJsp="";
		if(session.getAttribute("userId")==null){
			toJsp="/bookshop/notLogin.jsp";
		} else if(session.getAttribute("cartList")!=null){
			toJsp="/bookshop/cartFull.jsp";
		}else{
			session.removeAttribute("userId");
			toJsp="/bookshop/operationSuccess.jsp";
		}
		response.sendRedirect(toJsp);
	}
}