addsubjectuserservlet.java.svn-base

远程学生作业提交系统,所用技术JSP,Servelet,Ajax,Web Services,MySql

/*
 * AddStudentUserServlet.java
 * Created on October 20, 2006
 */

package com.sixtwenty.servlet;

import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;

import org.apache.axis.client.Call;
import org.apache.axis.client.Service;
import org.apache.axis.encoding.XMLType;

import javax.xml.namespace.QName;
import javax.xml.rpc.ParameterMode;

import com.sixtwenty.Submit;
import com.sixtwenty.SubmitServiceLocator;

/**
 * This servlet allows the administrator to add user(student or staff) to subject.
 * @author grp-e
 *
 */
public class AddSubjectUserServlet extends HttpServlet {

	//String endpoint = "http://172.23.96.22:8180/axis/services/submit";
	String endpoint = "http://localhost:8080/axis/services/submit";

	/**
	 * Handles the get request
	 * @param request
	 * @param response
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
	throws IOException, ServletException
	{
		doPost(request, response);
	}


	/**
	 * Handles the post request
	 * @param request
	 * @param response
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
	throws IOException, ServletException {
		response.setContentType("text/html");
		PrintWriter out = response.getWriter ();

		try {
			Submit submit = null;

			try {

				//Instantiate the SubmitServiceLocator
				SubmitServiceLocator ssl = new SubmitServiceLocator();

				submit = ssl.getsubmit();
			} catch(Exception e) {
				throw new ServletException(e.toString());
			}

			String action = new String(request.getParameter("action")); //The action from jsp

			//Checks whether the action is subjectuser 
			if (action.equals("subjectuser")) {	
				Subjects[] listOfSubjects = null;

				//call to remote method getSubjectList
				listOfSubjects = submit.getSubjectList();

				//set the listOfSubjects in session 
				request.getSession().setAttribute("listsubjects", listOfSubjects);

				Users[] listOfUsers = null;

				//call to remote method getUserList
				listOfUsers = submit.getUserList("student");

				//set the listOfUsers
				request.getSession().setAttribute("liststudents", listOfUsers);

				RequestDispatcher requestDispatcher = getServletContext().getRequestDispatcher("/jsp/addsubjectuser.jsp");
				requestDispatcher.forward(request, response);
				return;
			}

			//Checks whether the action is addsubjectuser
			if (action.equals("addsubjectuser")) {

				String studentId = new String(request.getParameter("studentId"));	//The studentId
				String subjId = new String(request.getParameter("subjId"));	//The subjId

				//call to remote method setUserSubject
				submit.setUserSubject(studentId, subjId);

				//Forwarding to next jsp
				RequestDispatcher dispatcher = getServletContext().getRequestDispatcher("/jsp/adminpage.jsp");
				dispatcher.forward(request, response);
				return;
			}

		} catch (Exception e) {
			out.println(e.toString());
		}
	}

	/** Returns a short description of the servlet.
	 */
	public String getServletInfo() {
		return "This servlet is invoked to add user to subject";
	}
}