Ahmed M. Omar

i am going to develop a web application for mobile devices (specially IPone), i need to authenticate the client devices using their MAC addresses ,can i retrieve the mac address of the client in a servlet or in a jsp


thanks in advance

Haina Minawa wrote:
Spring and Struts are good candidates.

can you tell me how can i get started with that ?

i am going to develop a web application that will be accessed through mobile (i OS, android, ... ) using j2ee technologies, i want to know the best j2ee framework to do that


thanks in advance

i am developing a web application,using struts framework and Eclipse IDE and OC4J as a servlet container when i export a war file and trying to deploy this war on Oracle OAS 10g the following message appears :

Failed to deploy web application "aoas_new". Failed to deploy web application "aoas_new". . File C:\WINDOWS\TEMP\dir48668.tmp\aoas_new.war is not a jar file.
Resolution:

Base Exception:
java.util.zip.ZipException
invalid END header (bad central directory offset). invalid END header (bad central directory offset)

can any one tell me the reason or the solution of this problem?

thanks in advance

thank you very much bro , its got worked after updating and reinstalling of the .ear file ... thank you

i want to call a servlet inside a jar file, i put the jar file in the following path :
C:\Program Files\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\adminNode01Cell\Workplace.ear\app_engine.war\WEB-INF\lib

and i added the servlet registration and servlet mapping in web.xml at the following path:
Files\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\adminNode01Cell\Workplace.ear\app_engine.war\WEB-INF

and restarted the Workplace Application

when i type http://[hostname]:[port]/Workplace/[servletUrl]/

the Error 404: SRVE0190E: File not found: /AjaxServlet appears too me on browser


please help ,how can i access this servlet or what is the possible faults which i can make???

we want to retrieve TIFF images from IBM FileNet CMS on safari browser on ipad and editing (annotate) them and get it back to FileNet. We found a SDK called snowbound which
is providing web document viewing & manipulation solutions specially documents from FileNet, but the support provided by them is not enough probably cause the solution is not free

so please help me to find some well supported solution (will be better if it also free)


thanks in advance

i am deploying a web service on OC4j instance on oracle application server 10g, when user of the web service enters Windows-1256 character encoding characters (for arabic) the web service gets malfunction, can any one help me to make the OAS support Windows-1256 character URL encoding

regards

i am deploying a web service on OC4j instance on oracle application server 10g, when user of the web service enters Windows-1256 character encoding characters (for arabic) the web service gets malfunction, can any one help me to make the OAS support Windows-1256 character URL encoding

regards

i am trying to opining pdf files in servlet application this the code

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String contractId = request.getParameter("contractId"); String year = request.getParameter("year"); String letter = request.getParameter("letter"); String contType = request.getParameter("contType"); String orgUnitId = request.getParameter("orgUnitId"); dbConn dbConn = new dbConn(); dbConn.connect(); ServletOutputStream out = null; try { TContractBean tContractBean = new TContractBean(); tContractBean.setContId(contractId); tContractBean.setFkTBookTBYear(year); tContractBean.setFkTBookTBLetter(letter); tContractBean.setFkTccContType(contType); tContractBean.setOrganizationUnitId(orgUnitId); Vector imgPathes = new TContractDao().getImages(dbConn.getConn(), tContractBean); out = response.getOutputStream(); response.setContentType("application/pdf"); //FileConversions.convertAll(imgPathes) get byt[] of pdf file and iam sure that it works correctly every time out.write(FileConversions.convertAll(imgPathes)); out.flush(); } catch (Exception e) { e.printStackTrace(); } finally { dbConn.disconnect(); out.close(); } }


when i runing this code the pdf file works randomly (ie:works fine for 3 times and appears corrupted 2 times)


how can i write more professional code to make the pdf file works correctly every time

thank you i am working on converting them at server side

I have a massive number of TIF images which can't be showed in a web browser without add-ons and plugins so i need to online convert the TIF image to a browser friendly format (jpg for example)

is there a javascript library can do that??
regards

what is the difference between public static and private static when we declare instance variable in a class (regardless of the accessibility)
class A{ private static var1; public static var2; //what is the difference????? betwwen var1 and var2 }
are that affect on the initialization or finalization of the object

regards

i am using hibernate 3 all i want to achieve is to make a query using select and in the where clause there is a property may be null, if this property is null at run time it throws Null Pointer Exception at the statement that set this property please tell me how can i do it .

this the code :
public boolean isExist(Job checkObject) { Session session = sessionFactory.getCurrentSession(); Job job = null; boolean isExist = false; try{ session.beginTransaction(); Query q = session.createQuery("from Job where jobDesc = :jobDesc and jobId = :jobId"); q.setString("jobDesc", checkObject.getJobDesc()); q.setInteger("jobId", checkObject.getJobId()); job = (Job)q.uniqueResult(); session.getTransaction().commit(); if(job != null){ return true; } }catch(Exception e) { e.printStackTrace(); } return isExist; }
and this is the exception i got:
java.lang.NullPointerException at com.aomar.sakanOzabAdmin.dao.JobDao.isExist(JobDao.java:64) at com.aomar.sakanOzabAdmin.dao.JobDao.isExist(JobDao.java:1) at com.aomar.sakanOzabAdmin.service.JobService.isExist(JobService.java:29) at com.aomar.sakanOzabAdmin.service.JobService.isExist(JobService.java:1) at com.aomar.sakanOzabAdmin.action.JobAction.preValidateInsert(JobAction.java:49) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at com.opensymphony.xwork2.interceptor.PrefixMethodInvocationUtil.invokePrefixMethod(PrefixMethodInvocationUtil.java:121) at com.aomar.sakanOzabAdmin.interceptor.LogicValidationInterceptor.intercept(LogicValidationInterceptor.java:33) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:176) at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at org.apache.struts2.interceptor.validation.JSONValidationInterceptor.doIntercept(JSONValidationInterceptor.java:113) at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:263) at org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:68) at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:133) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:207) at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:207) at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:190) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at org.apache.struts2.interceptor.MultiselectInterceptor.intercept(MultiselectInterceptor.java:75) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:94) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:243) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:100) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:141) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:267) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:142) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:166) at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:176) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:190) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:187) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) at org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:52) at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:485) at org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77) at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:91) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:242) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:243) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:201) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:163) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:108) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:556) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:401) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:242) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:267) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:245) at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:260) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source)

the exception is thrown at line 9 in the code
q.setInteger("jobId", checkObject.getJobId());
regards

i am using struts 2.2.1 framework .i made struts anchor which make an ajax request to the server and return a page which injected to div element using bind tag .the problem is that the page returned from server and injected to the div has struts 2 ajax tags (bind tags) but it does not work this the code of the page that has the anchor and bind tag
<%@ page contentType="text/html; charset=UTF-8" %> <%@ taglib prefix="s" uri="/struts-tags"%> <%@ taglib prefix="sx" uri="/struts-dojo-tags" %> <ul> <li> <s:url action="job_listPage" id="listPageUrl"/> <s:a href="#" id="jobListAnchor"> <s:text name="label.job.list"/></s:a> <sx:bind id="listBinder" href="%{listPageUrl}" sources="jobListAnchor" events="onclick" targets="bodyDiv" executeScripts="true" separateScripts="true"/> </li> </ul>
and this the code of the page that has the div
<%@ page contentType="text/html; charset=UTF-8" %> <%@ taglib uri="http://tiles.apache.org/tags-tiles" prefix="tiles"%> <%@ taglib prefix="sx" uri="/struts-dojo-tags" %> <%@ taglib prefix="s" uri="/struts-tags"%> <html> <head> <s:fielderror/> <title><tiles:getAsString name="title" /></title> <sx:head cache="true" compressed="true" parseContent="true" /> </head> <body> <table cellspacing="1" width="100%" align="center"> <tr> <td colspan="2"> <tiles:insertAttribute name="header" /> </td> </tr> <tr> <td width="15%" valign="top" height="300px"><tiles:insertAttribute name="menu" /> </td> <td> <sx:div id="actionErrorDiv"> </sx:div> <sx:div id="bodyDiv" theme="xhtml" parseContent="true"> <tiles:insertAttribute name="body" /> </sx:div> </td> </tr> <tr> <td colspan="2"><tiles:insertAttribute name="footer" /></td> </tr> </table> </body> </html>

hint : in run time the first page is included (pluged) to the the second using tiles framework in the menu slot
regards