Timo Tamme

Hello!

I am new on J2EE and previously I have some experience with ASP.NET, so my question is about J2EE MVC. I know that servlet stands for controller and in view role is JSP page. So when I create view that contains many methods, so user can access to: delete item, update item, submit page, cancel etc. How is the best way to implement controller in J2EE? So far I have read from one basic J2EE book that servlet supports 'doGet' and 'doPost' methods (also it support some others, but its not relevant in my case). So far I have seen that servlet as controller is not for my needs, I want controller to be something where these view functions are in separate methods in controller. For example clicking delete in view calls from 'ItemController.class' method 'deleteItem'. How can I do that, or is it even possible? Which are the best practices?

I'm trying to setup maven and struts 2 project in Eclipse, but I'm having problems. I have chosen to create simple HelloWorld example and afterwards add some other functionality, but I'm having problems.

I have 'struts.xml' path in project: src/main/resources/struts.xml

and inside it:

<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN" "http://struts.apache.org/dtds/struts-2.0.dtd"> <struts> <package name="default" namespace="/" extends="struts-default"> <action name="Login"> <result>/Pages/Login.jsp</result> </action> <action name="Index"> <result>/Pages/Index.jsp</result> </action> <action name="Welcome" class="com.contactweb.main.Contact"> <result name="SUCCESS">/Pages/Welcome.jsp</result> </action> </package> </struts>
also I have web.xml with path src/main/web/WEB-INF/web.xml and content:

<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd" > <web-app> <display-name>ContactWeb</display-name> <filter> <filter-name>struts2</filter-name> <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class> </filter> <filter-mapping> <filter-name>struts2</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> </web-app>
From commandline I use 'mvn clean install' and I get .war file to target folder, that .war file I'm going to deploy under Tomcat (also it deploys it successfully) but when I enter url I get error:

The requested resource (/ContactWeb/Pages/Login.jsp) is not available.

same error with different url-s only path is different (/ContactWeb/Login.jsp, /ContactWeb/Login.action etc.).

In my project I do have Login.jsp, Index.jsp and also Welcome.jsp. They are under: src/main/web/Pages

I have read somewhere that in struts2 I need to but .action extension to url, but it doesn't work and also why in struts.xml is package name and namespace? what exactly needs to be there? I have read that is for page what it is going to display?

I find solution for my problem, I undeployed my project from Tomcat, restarted Tomcat service and deployed my project again and JSTL standard tags are working now. Thanks for trying to helpp me!

Now I tried with this tutorial, but didnt help me, still getting the same error:
org.apache.jasper.JasperException: The absolute uri: http://java.sun.com/jsp/jstl/core cannot be resolved in either web.xml or the jar files deployed with this application

I changed these .jar files and removed previous ones (also removed old .jar files from Eclipse project), also chekced that my $CATALINA_HOME/lib doesn't contain these .jar's already.
Do I need to use older version of Tomcat?

Hi

I am usng Tomcat 7.0.23 and Eclipse to learn J2EE programming, but I am getting errors in part where JSTL is introduced, my exact error is:
org.apache.jasper.JasperException: The absolute uri: http://java.sun.com/jsp/jstl/core cannot be resolved in either web.xml or the jar files deployed with this application

In my project I have in WEB-INF/lib folder files: jstl-1.2.jar and standard.jar.
My web.xml file is below:
<?xml version="1.0" encoding="UTF-8"?> <web-app version="2.5" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_5.xsd"> <servlet> <servlet-name>AddUser</servlet-name> <servlet-class>com.user.UserHandler</servlet-class> </servlet> <servlet-mapping> <servlet-name>AddUser</servlet-name> <url-pattern>/AddUser</url-pattern> </servlet-mapping> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> </web-app>

Can anyone help me with this problem?

I don't actually know, if there is any framework. It should be made up by developers team, who worked here before.

Hi everyone, I am usng input on jsp page:
<span class="input"> <f:text styleClass="userInput" maxlength="3" name="Amount[${itemId}]"> <fmt:formatNumber pattern="${percentagePattern}" value="${Amount}" /> </f:text> </span>

Is it somehow possible to save this input value until user submits this form? So if user searches from different page and came back to a form page, these values are already initialized by previous input values?
Searched from google too, but didn't find anything useful. I am trying to do this with jsp or javascript, is it even correct way?

Hello!
I am quite new at HTML and JavaScript and I make web page, where users can insert some data.
So I have done HTML page, where user can insert different values, but form continues in separate pages. So I have problem that I want to save form data before submitting it. Is this even possible by using JavaScript?
In my dreams the ideal solution would work with saving data to XML and if user is going to previous page of form, it will be initialized from XML by using JavaScript.
Can you give me some ideas / hints to make this solution?