info.java

使用JSP+Servlet+Hibernate+Struts实现的一个学生软件发布平台

package edu.neu.sspp.servlet;

import java.io.IOException;

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

import edu.neu.sspp.SSPPLogger;
import edu.neu.sspp.hibernate.HibernateSessionFactory;
import edu.neu.sspp.hibernate.TTeacher;
import edu.neu.sspp.hibernate.TTeacherDAO;
import edu.neu.sspp.hibernate.TUser;
import edu.neu.sspp.hibernate.TUserDAO;

public class Info extends HttpServlet {

	/**
	 * Constructor of the object.
	 */
	public Info() {
		super();
	}

	/**
	 * Destruction of the servlet. <br>
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}

	/**
	 * 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 {
		String role = (String)request.getSession().getAttribute("login");
		if(role.equals("teacher")) {
			TTeacherDAO teacherDAO = new TTeacherDAO();
			TTeacher teacher = teacherDAO.findById((String)request.getSession().getAttribute("id"));
			
			request.setAttribute("teacher", teacher);
			
			SSPPLogger.logInfo(teacher.getName() + " 查看信息" + " IP:" + request.getRemoteAddr());
		}
		if(role.equals("user")) {
			TUserDAO userDAO = new TUserDAO();
			TUser user = userDAO.findById((String)request.getSession().getAttribute("id"));
			
			request.setAttribute("user", user);
			
			SSPPLogger.logInfo(user.getUserName() + " 查看信息" + " IP:" + request.getRemoteAddr());
		}
		//涉及懒读的不可以关闭，否则最好关了吧
		HibernateSessionFactory.closeSession();
		
		//相当于<jsp:forward>保存请求的重定向,字符串要求是相对于本servlet的路径
		request.getRequestDispatcher("../mem_info.jsp").forward(request, response);
	}
	
	//防止无法处理post请求
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		doGet(request, response);
	}
	

	/**
	 * Initialization of the servlet. <br>
	 *
	 * @throws ServletException if an error occure
	 */
	public void init() throws ServletException {
		// Put your code here
	}

}