loginservlet.java

对java中如何使用Ant代码！代码详尽。

package chapter13.servlet;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class LoginServlet extends HttpServlet {

	protected void service(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException {
		String forwardFile = "/success.jsp";
		String username = request.getParameter("user");
		String password = request.getParameter("passwd");

		if ((username == null || username.trim().equals(""))
				|| (password == null || password.equals(""))
				|| !UserUtil.login(username, password)) {
			request.setAttribute("message", "用户名或密码错误，请重新输入！");
			forwardFile = "/login.jsp";
		} else {
			request.setAttribute("message", "登录成功！");
		}

		request.getSession().getServletContext().getRequestDispatcher(
				forwardFile).forward(request, response);
	}

}