package com.manning.ajaxinaction.portal;import java.io.IOException;import java.io.Writer;import java.util.Iterator;import java.util.List;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import javax.servlet.http.HttpSession;public class SelectServlet extends HttpServlet {  protected void doPost(    HttpServletRequest request, 	HttpServletResponse response  ) throws ServletException, IOException {    HttpSession session=request.getSession();  	User user=(User)(session.getAttribute("user"));    StringBuffer jsBuf=new StringBuffer();  	if (user==null){  	  jsBuf.append(JSUtil.logout());	  	}else{  	  List windows=DBUtil.getPortalWindows(user);  	  jsBuf.append(JSUtil.initUI());  	  for (Iterator iter=windows.iterator();iter.hasNext();){  	    PortalWindow window=(PortalWindow)(iter.next());  	    session.setAttribute("window_"+window.getId(),window);  	  	jsBuf.append(JSUtil.initWindow(window));    	  }  	}    Writer writer=response.getWriter();    writer.write(jsBuf.toString());    writer.flush();  }}