adminuserservlet.java

一个简单的BBS系统 适用于初学者用JSP和连接池 开发系统

package webbook.guestbook;
import java.io.IOException;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.*;
import webbook.util.OracleUtil;
import webbook.util.StringUtil;
import org.apache.commons.dbutils.handlers.MapListHandler;

public class AdminUserServlet extends HttpServlet {
	private static final long serialVersionUID = 5801558969966197290L;

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

		if (StringUtil.validateNull(username)) {
			message = "对不起，姓名不能为空，请您重新输入！<br>";
		} else if (StringUtil.validateNull(password)) {
			message = "对不起，密码不能为空，请您重新输入！<br>";
		} else {
			String param[] = { username, password };
			OracleUtil db = new OracleUtil("java:/comp/env/jdbc/oracleds");
			db.init();
			List result = (List) db.query("select id from admin where username=? and password=?", param,
					new MapListHandler());
			if (result.size() == 0) {
				message = "对不起，用户名或者密码错误";
				request.setAttribute("guesbook.admin.login.message", message);
				request.getRequestDispatcher("/admin/loginFail.jsp").forward(request, response);
			} else {
				HttpSession session = request.getSession();
				session.setAttribute("guesbook.admin.username", username);
				request.getRequestDispatcher("/admin/secure/manage?q=list").forward(request, response);
			}
		}
	}
	
	public void logout(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		HttpSession session = request.getSession();
		session.removeAttribute("guesbook.admin.username");
		request.getRequestDispatcher("/admin/login.jsp").forward(request, response);
	}

	public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		String method = request.getParameter("q");
		if(method==null){
			method="";
		}
		if (method.equals("login")) {
			login(request, response);
		} else {
			logout(request, response);
		}
	}

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