actionlistener.java

简单的用户管理

package com.howeisoft.ums.dao;

import java.io.IOException;
import java.util.List;

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 javax.servlet.http.HttpSession;

import com.howeisoft.ums.entity.User;
import com.howeisoft.ums.service.Uservice;

public class ActionListener extends HttpServlet {

	private static final long serialVersionUID = 9050907585634397895L;

	public ActionListener() {
	}

	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		String path = request.getServletPath();
		path = path.substring(0, path.lastIndexOf("."));
		System.out.println(path + "*******************");
		if (path.equals("/action")) {
			find(request, response);
		} else if (path.equals("/delete")) {
			delete(request, response);
		} else if (path.equals("/login")) {
			login(request, response);
		} else {
			throw new ServletException("δ֪ " + path);
		}
	}

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

	public void find(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		try {
			Uservice Uservice = new Uservice();
			List<User> users = Uservice.searchUsers();

			request.setAttribute("users", users);

			ServletContext app = getServletContext();
			RequestDispatcher dispatcher = app
					.getRequestDispatcher("/index.jsp");
			dispatcher.forward(request, response);

		} catch (Exception e) {
			e.printStackTrace();
			throw new ServletException(e.getMessage());
		}
	}

	public void delete(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
	}

	public void login(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		String userName = request.getParameter("u_name");
		String password = request.getParameter("u_pwd");

		if (userName.equals(getInitParameter("username"))
				&& password.equals(getInitParameter("password"))) {
			HttpSession session = request.getSession(true);
			session.setAttribute("u_name", userName);
			 response.sendRedirect(request.getContextPath()+"/action.do");
//			ServletContext context = getServletContext();
//			RequestDispatcher dispatcher = context
//					.getRequestDispatcher("/action.do");
//			dispatcher.forward(request, response);
		} else {
			response.sendRedirect(request.getContextPath() + "/login.jsp");
		}
	}
}