modifyroomstate.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 database.connectDB;

public class ModifyRoomState extends HttpServlet {

	/**
	 * Constructor of the object.
	 */
	public ModifyRoomState() {
		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 {

		response.setContentType("text/html;charset=gb2312");
		PrintWriter out = response.getWriter();
        
		String roomID = request.getParameter("roomID");
		String state = request.getParameter("state");
		//out.print(state);
		
		
		if(roomID == "")
		{
			   out.print("The roomID cann't be null!");
		}else{
			try{
				connectDB con = new connectDB();
			if(state.equals("0")){
			    String sql1 = "update room set roomState = '净房可用' where roomID = '"+roomID+"'";			 
			    con.excuteUpdate(sql1);	
			    out.println("<center>");
			    out.println("更改成功！");
			    out.println("服务器将自动跳转到前页");
			    out.println("<br>");
			    out.println("<a href='/hotel/modifyRoomState.jsp'>");
			    out.println("如果没有跳转，请点击这里！");
			    out.println("</a>");
			    out.println("<meta http-equiv='refresh' content='1 url=/hotel/modifyRoomState.jsp'>");	
			}
			if(state.equals("1")){
				String sql1 = "update room set roomState = '净房占用' where roomID = '"+roomID+"'";			 
			    con.excuteUpdate(sql1);	
			    out.println("<center>");
			    out.println("更改成功！");
			    out.println("服务器将自动跳转到前页");
			    out.println("<br>");
			    out.println("<a href='/hotel/modifyRoomState.jsp'>");
			    out.println("如果没有跳转，请点击这里！");
			    out.println("</a>");
			    out.println("<meta http-equiv='refresh' content='1 url=/hotel/modifyRoomState.jsp'>");
				
			}
			if(state.equals("2")){
				String sql1 = "update room set roomState = '脏房' where roomID = '"+roomID+"'";			 
			    con.excuteUpdate(sql1);	
			    out.println("<center>");
			    out.println("更改成功！");
			    out.println("服务器将自动跳转到前页");
			    out.println("<br>");
			    out.println("<a href='/hotel/modifyRoomState.jsp'>");
			    out.println("如果没有跳转，请点击这里！");
			    out.println("</a>");
			    out.println("<meta http-equiv='refresh' content='1 url=/hotel/modifyRoomState.jsp'>");
				
			}
			if(state.equals("3")){
				String sql1 = "update room set roomState = '坏房' where roomID = '"+roomID+"'";			 
			    con.excuteUpdate(sql1);	
			    out.println("<center>");
			    out.println("更改成功！");
			    out.println("服务器将自动跳转到前页");
			    out.println("<br>");
			    out.println("<a href='/hotel/modifyRoomState.jsp'>");
			    out.println("如果没有跳转，请点击这里！");
			    out.println("</a>");
			    out.println("<meta http-equiv='refresh' content='1 url=/hotel/modifyRoomState.jsp'>");
				
			}
		}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
	}

}