authenticate.java

基于java的医院门诊管理系统

package crqs.servlets;

import java.io.IOException;
import java.sql.SQLException;

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 org.apache.taglibs.standard.tag.common.core.CatchTag;

import crqs.dboperation.Administrator;
import crqs.dboperation.Checker;
import crqs.dboperation.Doctor;
import crqs.dboperation.Patient;
import crqs.exceptions.RecordsNotExistException;

public class Authenticate extends HttpServlet {

	public Authenticate() {
		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 {
		doPost(request, response);
	}

	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		String un = request.getParameter("userName");
		String pw = request.getParameter("password");
		String message = null;
		String url=null;
		HttpSession hs=request.getSession();
		switch (request.getParameter("identity").charAt(0)) {
		case 'p': {
			Patient ptnt = new Patient(un, pw);
			try {
				if (ptnt.login()) {
					hs.setAttribute("validUser", ptnt);
					hs.setAttribute("welcome", ptnt.getUserName());
					response.sendRedirect(response
							.encodeRedirectURL("/CRQS/client/MyReservation"));
					return;
				} else
					message = "密码不正确请重试";
			} catch (SQLException e) {
				message = "数据库连接出错";
			} catch (RecordsNotExistException e) {
				message = "用户名不存在，请先注册";
			}
			url="index.jsp";
			break;
		}
		case 'd': {
			Doctor dctr = new Doctor(un, pw);
			try {
				if (dctr.login()) {
					hs.setAttribute("validUser", dctr);
					hs.setAttribute("welcome", dctr.getUserName());
					response.sendRedirect(response
							.encodeRedirectURL("/CRQS/doctor/ReservationToday"));
					return;
				} else
					message = "密码不正确请重试";
			} catch (SQLException e) {
				message = "数据库连接出错";
			} catch (RecordsNotExistException e) {
				message = "用户名不存在，请先注册";
			}
			url="index.jsp";
			break;

		}
		case 'c': {
			Checker ckr = new Checker(un, pw);
			try {
				if (ckr.login()) {
					hs.setAttribute("validUser", ckr);
					hs.setAttribute("welcome", ckr.getUserName());
					response.sendRedirect(response
							.encodeRedirectURL("/CRQS/checker/checkermain.jsp"));
					return;
				} else
					message = "密码不正确请重试";
			} catch (SQLException e) {
				message = "数据库连接出错";
			} catch (RecordsNotExistException e) {
				message = "用户名不存在，请先注册";
			}
			url="login.jsp";
			break;
		}
		case 'a': {
			Administrator admin = new Administrator(un, pw);
			try {
				if (admin.login()) {
					hs.setAttribute("validUser", admin);
					hs.setAttribute("welcome", admin.getUserName());
					response.sendRedirect(response
							.encodeRedirectURL("/CRQS/admin/searchdoctor.jsp"));
					return;
				} else
					message = "密码不正确请重试";
			} catch (SQLException e) {
				message = "数据库连接出错";
			} catch (RecordsNotExistException e) {
				message = "用户名不存在，请先注册";
			}
			url="login.jsp";
			break;
		}
		}
		hs.setAttribute("message", message);
		hs.setAttribute("url", url);
		response.sendRedirect(response
				.encodeRedirectURL("message.jsp"));
	}

}