loginservlet.java

MyEclipse6Java中文教程的代码

package servlets;

import java.io.IOException;

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

import dao.StudentDAO;
import entity.Student;

public class LoginServlet extends HttpServlet {

	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		Student student = new StudentDAO().findStudent(
				request.getParameter("username"),request.getParameter("password"));
		if(student != null && student.getUsername().equals(request.getParameter("username")) && 
				student.getPassword().equals(request.getParameter("password"))) {
			request.setAttribute("message", "成功");
			//保存登录用户到session中
			request.getSession().setAttribute("student", student);
		} else {
			request.setAttribute("message", "失败");
		}
		//转向登录结果页面
		request.getRequestDispatcher("/result.jsp").forward(request, response);
	}
}