Java书籍

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Java

FrontController.java：源码内容
							import java.io.*;
import java.text.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.sql.*;
public class FrontController extends HttpServlet
{
	int Flag11=0;
	public void init() 
	{
		
	}
	
	public void service(HttpServletRequest request,HttpServletResponse response)throws IOException,ServletException
	{
		String uname , pass ;
				
		
		System.out.println("FC started");
		
		if(Flag11==0)
		{
		request.getSession().setAttribute("page",new Integer(0));
		request.getSession().setAttribute("event",new Integer(0));
		request.getSession().setAttribute("qno",new Integer(1));
		request.getSession().setAttribute("marks",new Integer(0));
		Flag11=1;
		}
		/*
		uname = request.getParameter("uname");
		pass = request.getParameter("pass");
		*/
/*
		Hashtable h1 = new Hashtable();
		h1.put("LoginJsp",new Integer(1));
		h1.put("ValidateUserServlet",new Integer(2));
		h1.put("GetQuestionServlet",new Integer(3));
		h1.put("QuestionJsp",new Integer(4));
		Hashtable h2 = new Hashtable();
		h2.put("Submit",new Integer(1));
		h2.put("Next",new Integer(2));
		h2.put("invalid user",new Integer(3));
		h2.put("valid user",new Integer(4));
*/
		int qno = 1;
		int loginTimes = 0;
		int flag =0;
		int p=0;
		int e=0;
		service:
		{
		while(qno != 10)
		{
			if(flag == 0)
			{
			System.out.println(">>>>line 56");
			p = ((Integer)request.getSession().getAttribute("page")).intValue();
			System.out.println("line 59<<<<< " + p);
			e = ((Integer)request.getSession().getAttribute("event")).intValue();
			qno = ((Integer)request.getSession().getAttribute("qno")).intValue();
			}
			System.out.println("-----------line 63");
			switch(p)
			{
				case 0:
					if(loginTimes < 3)
					{
					System.out.println("line 63 onwards	++++++++++++ ");					
					request.getRequestDispatcher("/Loginjsp.jsp").forward(request,response);
					System.out.println("line 70++++++++++++ ");
					loginTimes++;
					flag=0;
				
					break service;
					}
					else
					{
						request.getSession().invalidate();
						response.sendRedirect("/invalidJsp.jsp");
					}
					break;
				case 1:
					request.getRequestDispatcher("/servlet/ValidateUserServlet").include(request,response);
					System.out.println("line 82========= ");
					break;
				case 2:
					if(e==3)
					{
							flag = 0;
							request.getSession().setAttribute("page",new Integer(0));
							request.getSession().setAttribute("event",new Integer(0));
					}
					if(e==4)
					{
							request.getRequestDispatcher("/servlet/GetQuestionServlet").include(request,response);
							System.out.println("line 94|||||||||||||| ");
					}
					break;
				case 3:
					request.getRequestDispatcher("/QuestionJsp.jsp").forward(request,response);
					qno++;
					request.getSession().setAttribute("qno",new Integer(qno));
					break service;
					//break;
				case 4:
					request.getRequestDispatcher("/servlet/GetQuestionServlet").include(request,response);
					break;
				default:
					System.out.println("deafault  ");
			}//end of switch
		}//end of while
		}//service
		request.getRequestDispatcher("/DisplayMarks.jsp").include(request,response);
	}
}

						