deleteuser.java

简单的餐厅管理系统

package controller;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.Hashtable;

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 beans.User;

public class DeleteUser extends HttpServlet {

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

		response.setContentType("text/html");
		request.setCharacterEncoding("GBK");
		HttpSession mySession = request.getSession();
		
		int type ;
		
		if(mySession.getAttribute("type") == null){
			type = 0;
		}else{
			type = Integer.parseInt(mySession.getAttribute("type").toString());
		}
		
		
		if(type != 1){
			mySession.setAttribute("errorMsg","对不起！您不具有删除服务员的权限。");
			response.sendRedirect("../main.jsp");
			return;
		}
		
		String username;
		username = request.getParameter("username");
		if(username == null){
			username = "";
		}
		User newUser = new User();
		newUser.getWaiterData(username);
		
		Hashtable addUser = new Hashtable();
		addUser.put("username", newUser.getUserName());
		addUser.put("realname", newUser.getRealName());
		mySession.setAttribute("addUser", addUser);
		if(newUser.getType() == 1){
			mySession.setAttribute("errorMsg","不能删除管理员");
			response.sendRedirect("../admin/user/showuser.jsp");
			return;
		}
		String errorMsg = newUser.deleteUser();
	
		if(errorMsg == null){
			mySession.setAttribute("errorMsg",null);
			response.sendRedirect("../admin/user/showuser.jsp");
		}else{
			mySession.setAttribute("errorMsg",errorMsg);
			response.sendRedirect("../admin/user/deleteuser.jsp");
		}
	}

	/**
	 * 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");
		doGet(request,response);
	}

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

}