registerservlet.java

酒店管理系统

package servlet;

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

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 database.connectDB;

public class RegisterServlet extends HttpServlet {

	/**
	 * Constructor of the object.
	 */
	public RegisterServlet() {
		super();
	}

	/**
	 * Destruction of the servlet. <br>
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}

	/**
	 * The doGet method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

	}

	/**
	 * The doPost method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to post.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		PrintWriter out = response.getWriter();
		String identifierID = request.getParameter("identifierID");
		HttpSession session = request.getSession();
		session.setAttribute("identifierID", identifierID);
		boolean bl;
		
		if(identifierID == ""){
			response.sendRedirect("/hotel/register.jsp?errMsg=Please enter the identifierID!");
		}
		
		try{
			connectDB con = new connectDB();
			String sql1 = "select identifierID from customerInfo where identifierID = '" + identifierID + "';";
			con.excuteQuery(sql1);
			bl = con.next();
			
			
			
			//out.print(con.getString(2));
			if(!bl){
				
				response.sendRedirect("/hotel/more.jsp");
			}else{
				String sql2 = "select unWelcome from customerInfo where identifierID = '" + identifierID + "';";
				con.excuteQuery(sql2);
				con.next();
				String str = con.getString(1);
				//out.print(str);
				
				if(str.equals("否"))
				{
					out.print("We have your information!");
					response.sendRedirect("/hotel/register.jsp?errMsg=We have your information! <a href='more.jsp'>CHANGE?</a>");
					//out.print("<a href='informationChange.jsp'>CHANGE?</a>");
				}else if(str.equals("是"))
				{
					out.print("We have your information!");
					response.sendRedirect("/hotel/register.jsp?errMsg=Sorry, unWelcome!");
					//out.print("We have your information!");
				}else
				{
					
				}
			}
			
		}catch(Exception e){
			e.printStackTrace();
		}

	}

	/**
	 * Initialization of the servlet. <br>
	 *
	 * @throws ServletException if an error occure
	 */
	public void init() throws ServletException {
		// Put your code here
	}

}