openin.java

这是学生管理网站的java源码,可以管理学生信息

package org.myservlets;

import java.io.IOException;
import java.io.PrintWriter;

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.myJavabeans.DataConnection;

public class openIn extends HttpServlet {

	/**
	 * The doGet method of the servlet. <br>
	 * 
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request
	 *            the request send by the client to the server
	 * @param response
	 *            the response send by the server to the client
	 * @throws ServletException
	 *             if an error occurred
	 * @throws IOException
	 *             if an error occurred
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		doPost(request, response);
	}

	/**
	 * The doPost method of the servlet. <br>
	 * 
	 * This method is called when a form has its tag value method equals to
	 * post.
	 * 
	 * @param request
	 *            the request send by the client to the server
	 * @param response
	 *            the response send by the server to the client
	 * @throws ServletException
	 *             if an error occurred
	 * @throws IOException
	 *             if an error occurred
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		DataConnection ds = new DataConnection();
		String t_id = request.getParameter("t_id");
		String t_password = request.getParameter("t_password");
		String t_name=ds.executename(t_id);
		int i = ds.isAdmin(t_id, t_password);
		if (i == 1) {//是管理员
			request.setAttribute("t_name", t_name);
			HttpSession session=request.getSession();
			session.setAttribute("adminid",t_id);
			request.getRequestDispatcher("/admin.jsp").forward(request,
					response);
		} else if(i==3){//是教师
			request.setAttribute("t_name",t_name);
			HttpSession session=request.getSession();
			session.setAttribute("teacherid",t_id);
			request.getRequestDispatcher("/teacher.jsp").forward(request,
					response);
		}else if(i==2){//密码错误
			request.setAttribute("jsp", "open.jsp");
			request.setAttribute("message",t_name+":您输入的密码不正确！");
			request.getRequestDispatcher("/error.jsp").forward(request,
					response);
		}else{
			request.setAttribute("jsp", "open.jsp");
			request.setAttribute("message","没有此用户信息！");
			request.getRequestDispatcher("/error.jsp").forward(request,
					response);
		}
	}

}