updateservlet.java

订购火车票

package c;

import java.io.IOException;
import java.io.PrintWriter;

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

import m.SelectTicket;

public class UpdateServlet extends HttpServlet {

	public UpdateServlet() {
		super();
	}

	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}

	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		response.setContentType("text/html");
		PrintWriter out = response.getWriter();
		ServletContext con=getServletContext();//Java运行与一个ServletContext中
		RequestDispatcher r=request.getRequestDispatcher("./TicketServlet");
		//import Javax.servlet.RequestDispatcher接口的forword
		//方法用来将Http请求从一个servlet发送到别一个servlet
		SelectTicket S = new SelectTicket();//
		String check = request.getParameter("type");
		if (check.equals("clear")) {
			S.UpdateDB();
		}
		if (check.equals("buy")) {
			String[] num = request.getParameterValues("Weishou");// 获得复选框的值
			for (int i = 0; i < num.length; i++) {
				S.buy(num[i]);

			}
		}//response.sendRedirect("TicketServlet");
		r.forward(request, response);
//		response.sendRedirect("/Ticket/My.jsp");
	}

	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		this.doGet(request, response);
	}

	public void init() throws ServletException {
		// Put your code here
	}

}