?? controller.java
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package servlet;
import java.io.IOException;
import java.io.PrintWriter;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
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 stateful.CountBeanLocal;
public class Controller extends HttpServlet {
private Context ctx;
/**
* Constructor of the object.
*/
public Controller() {
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 {
CountBeanLocal cbl = null;
HttpSession session = request.getSession();
cbl = (CountBeanLocal) session.getAttribute("countBean");
if(cbl == null){
try {
cbl = (CountBeanLocal) ctx.lookup("CountBean/local");
session.setAttribute("countBean", cbl);
} catch (NamingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
response.setContentType("text/html");
PrintWriter out = response.getWriter();
out.println("count's value:" + cbl.count());
out.flush();
out.close();
}
/**
* 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 {
doGet(request,response);
}
/**
* Initialization of the servlet. <br>
*
* @throws ServletException if an error occure
*/
public void init() throws ServletException {
// Put your code here
try {
ctx = new InitialContext();
} catch (NamingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
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