maindo.java

一个真实的网络选课系统,由实际需求得到的,本人实际开发出来,运用JSP+TOMCAT

package servlet;

import java.io.IOException;
import java.util.Date;

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import com.JDBConnection;
import com.Value;

public class Maindo extends HttpServlet {
	
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		HttpSession session=request.getSession(true);
		String stdno=(String)session.getAttribute("id");
		
		
		if(request.getParameter("button")!=null&&stdno!=null)
		{
			String    button=request.getParameter("button");
			JDBConnection db= new JDBConnection();
			int week=Value.getWeek(Integer.parseInt(button));
			int time=Value.getTime(Integer.parseInt(button));
			int value=Value.getValue(new Date())+1;
			if(db.insertSelInfo(week, time, value, stdno))
				goo(request,response);
			else
				doError(request,response);
		}
		else
			doError(request,response);
	}
	
	public void goo(HttpServletRequest req, HttpServletResponse res)
	throws ServletException,IOException
		{
		res.sendRedirect("http://222.192.23.25:8088/select/user/main.jsp");
		}
	
	
	public void doError(HttpServletRequest req,
	                      HttpServletResponse res
	                     )
	                      throws ServletException, IOException {

	    
			    RequestDispatcher rd = getServletContext().getRequestDispatcher("/user/inserterror.html");
			    rd.forward(req, res);
	  }

}