As far as I know, &quot;INF&quot; stands for &quot;Information&quot;, as you said.  It probably was named `WEB-INF` for similarity with the `META-INF` directory in JAR files.  Sometimes the meaning of a directory changes so much over time that it no longer makes sense.  For example, `bin` directories in Unix/Linux often contain non-binary &quot;executable&quot; files, such as shell scripts.

I believe it&#39;s really named WEB-INF to mirror the META-INF directory in a jar file, which contains meta information. I do see what you mean about it being as much about executables as &quot;information&quot; but the main point is that it doesn&#39;t contain the documents of the application.

It&#39;s a directory to store private application content. Anything your app needs but your client doesn&#39;t can be stored there. Anything in that directory is not visible to the web.

Source: 

http://tomcat.apache.org/tomcat-7.0-doc/appdev/source.html#Directory_Structure
http://docs.oracle.com/cd/E13222_01/wls/docs70/webapp/basics.html#136976


I think, the only logical definition is WEB-INF is mirror of META-INF. Naming is really important for beginners and if it is confusing then the subject is getting harder to understand.

The `WEB_INF` folder contains the `web.xml` (deployment descriptor) file, the classes, external libs etc and as `web.xml` file contains the information about the container urls, files etc, the folder is known as `WEB-INF`.

I wrote a program that allow two classes to &quot;fight&quot;. For whatever reason C# always wins. What&#39;s wrong with VB.NET ?

       static void Main(string[] args)
        {
            Player a = new A();
            Player b = new B();

            if (a.Power &gt; b.Power)
                Console.WriteLine(&quot;C# won&quot;);
            else if (a.Power &lt; b.Power)
                Console.WriteLine(&quot;VB won&quot;);
            else
                Console.WriteLine(&quot;Tie&quot;);
        }

Here are the players: 
Player A in C#:

    public class A : Player
    {
        private int desiredPower = 100;

        public override int GetPower
        {
            get { return desiredPower; }
        }
    }

Player B in VB.NET:

    Public Class B
       Inherits Player
        
       Dim desiredPower As Integer = 100
        
       Public Overrides ReadOnly Property GetPower() As Integer
           Get
              Return desiredPower
           End Get
       End Property
     End Class

And here is a base class.

    public abstract class Player
    {
        public int Power { get; private set; }

        public abstract int GetPower { get; }

        protected Player()
        {
            Power = GetPower;
        }
    }


I wrote a program that allow two classes to &quot;fight&quot;. For whatever reason C# always wins. What&#39;s wrong with VB.NET?

Is it possible to get a row with all column names of a table like this?

    |id|foo|bar|age|street|address|

I don&#39;t like to use `Pragma table_info(bla)`.

How to get a list of column names

Most of the places on the internet say it stands for **WEB INF**ormation.

I rather doubt it. The folder contains executables. **Information** is not a suitable name for it.

What does WEB-INF stand for in a Java EE web application?

Most of the places on the internet say it stands for WEB INFormation.
I rather doubt it. The folder contains executables. Information is not a suitable name for it.

By default, Tomcat sends some HTML content back to the client if it encounters something like an HTTP 404. I know that via `web.xml` an `&lt;error-page&gt;` [can be configured][1] to customize this content.

However, I&#39;d just like for Tomcat to **not send anything** in terms of response content (I&#39;d still like the status code, of course). Is there any way to easily configure this?

I&#39;m trying to avoid A) explicitly sending empty content on the response stream from my Servlet, and B) configuring custom error pages for a whole bunch of HTTP error statuses in my `web.xml`.

For some background, I&#39;m developing an HTTP API and am controlling my own response content. So for an HTTP 500, for example, I&#39;m populating some XML content on the response containing error information. For situations like an HTTP 404, the HTTP response status is sufficient for clients, and the content tomcat is sending is unnecessary. If there&#39;s a different approach, I&#39;m open to hearing it.

**Edit:**
After continued investigation, I still can&#39;t find much in the way of a solution. If someone can definitively say this is not possible, or provide a resource with evidence that it will not work, I&#39;ll accept that as an answer and try and work around it.

  [1]: http://wiki.apache.org/tomcat/FAQ/Miscellaneous#Q6

Disable all default HTTP error response content in Tomcat

I am getting a bit confused here. In our application we are having a few servlets defined. Here is the excerpt from the `web.xml` for one of the servlets:

&lt;!-- language: xml --&gt;

    &lt;servlet&gt;
		&lt;servlet-name&gt;AxisServlet&lt;/servlet-name&gt;
		&lt;display-name&gt;Apache-Axis Servlet&lt;/display-name&gt;
		&lt;servlet-class&gt;com.foo.framework.axis2.http.FrameworkServlet&lt;/servlet-class&gt;
		&lt;load-on-startup&gt;0&lt;/load-on-startup&gt;
	&lt;/servlet&gt; 


As per my understanding the value for the `&lt;load-on-startup&gt;` has to be a positive integer in order for it to get loaded automatically. I looked up on google but the responses I came across only added to my confusion.

What does the servlet &lt;load-on-startup&gt; value signify

I have `jdk1.6.0_13` installed, but when I try to find a `javax.servlet` package, or press &lt;kbd&gt;Ctrl&lt;/kbd&gt;+&lt;kbd&gt;Space&lt;/kbd&gt; in Eclipse after `Servlet` I cannot get anything. Where can I download this package, and why isn&#39;t it included in standard distribution for developers?

Where&#39;s javax.servlet?

I&#39;ve mapped the Spring MVC dispatcher as a global front controller servlet on `/*`.

&lt;!-- language: xml --&gt;

    &lt;servlet&gt; 		
      &lt;servlet-name&gt;home&lt;/servlet-name&gt; 		
      &lt;servlet-class&gt;org.springframework.web.servlet.DispatcherServlet&lt;/servlet-class&gt; 	   
    &lt;/servlet&gt; 	
    &lt;servlet-mapping&gt; 		
      &lt;servlet-name&gt;home&lt;/servlet-name&gt; 		
      &lt;url-pattern&gt;/*&lt;/url-pattern&gt; 	
    &lt;/servlet-mapping&gt;

However, this mapping stops the access to static files like CSS, JS, images etc which are all in the `/res/` folder.

How can I access them anyway?

How to access static resources when mapping a global front controller servlet on /*

How do you remove a cookie in a Java servlet?

I tried this:
http://www.jguru.com/faq/view.jsp?EID=42225

EDIT: The following now works successfully it appears to be the combination of:

    response.setContentType(&quot;text/html&quot;);
and

    cookie.setMaxAge(0);

Before I was doing:

    //remove single signon cookie if it hasn&#39;t been validated yet
    response.setContentType(&quot;text/html&quot;);
    Cookie cookie = new Cookie(SSORealm.SSO_COOKIE_NAME, &quot;&quot;);
    cookie.setDomain(SSORealm.SSO_DOMAIN);
    cookie.setMaxAge(-1);
    cookie.setPath(&quot;/&quot;);
    cookie.setComment(&quot;EXPIRING COOKIE at &quot; + System.currentTimeMillis());
    response.addCookie(cookie);

Which expires the cookie when the browser is closed as per [the documentation][1].

&gt; A negative value means that the cookie is not stored persistently and will be deleted when the Web browser exits. A zero value causes the cookie to be deleted. 


The full working snippet to expire a cookie is:

    //remove single signon cookie if it hasn&#39;t been validated yet
    response.setContentType(&quot;text/html&quot;);
    Cookie cookie = new Cookie(SSORealm.SSO_COOKIE_NAME, &quot;&quot;);
    cookie.setDomain(SSORealm.SSO_DOMAIN);
    cookie.setMaxAge(0);
    cookie.setPath(&quot;/&quot;);
    cookie.setComment(&quot;EXPIRING COOKIE at &quot; + System.currentTimeMillis());
    response.addCookie(cookie);


  [1]: http://docs.oracle.com/javaee/6/api/javax/servlet/http/Cookie.html#setMaxAge%28int%29

How do you remove a Cookie in a Java Servlet

We&#39;re in the process of planning a large, enterprise application. We&#39;re focusing our efforts on evaluating hibernate after experiencing the pains of J2EE.

It looks like the new Java EE API is simpler. I&#39;ve also read some good things about Hibernate and iBatis. Our team has little experience with any of the frameworks.

There are 5 main comparisong points I&#39;d like to determine

- Learning Curve/Ease of Use
- Productivity
- Maintainability/Stability
- Performance/Scalability
- Ease of Troubleshooting

If you were to manage a team of ~6 developers with J2EE experience which ORM tool would you use and why?



Hibernate, iBatis, Java EE or other Java ORM tool

I&#39;m looking for a replacement for JCaptcha, which doesn&#39;t seem to be maintained any more, and isn&#39;t very good to begin with. The replacement has to integrate nicely with JavaEE webapps.

As I can see it, there are three options:

 - JCaptcha - No longer maintained, crude API
 - SimpleCaptcha - much nicer API, nicer captchas, but seems to be Java6 only
 - ReCaptcha - easy to use, uses remote web-service to generate captchas, but not much control over look and feel

Has anyone used any others, that they&#39;d recommend?

Recommendations for java captcha libraries

What are the scoping rules for variables in a jsp page with pages added to them using &lt;jsp:include&gt; tags?

My understanding is that an included page is essentially copied verbatim into the page, which would lead me to assume that if I&#39;ve declared a variable in a Parent JSP that it would be available in the child ones.

However Eclipse complains about this (understandably because I could feasibly include the pages in any page or use them as stand alone. And when I try to start the tomcat server it fails to start.

I basically want to get a couple of variables from the session in the parent page and use them in the child pages. This doesn&#39;t work.

So I&#39;ve struck ont he idea of getting them from the session in each of the child pages, however I was wondering if I could give them all the same variable names, or if I&#39;d have to pick different variable names for them in each page so they didn&#39;t clash.


Also what about imports if I import log4net in the parent jss do I also have to import it in the child ones?

Variables in jsp pages with &quot;included&quot; pages

I am developing a Java EE application that I deploy over and over again on a local JBoss installation during development. I want to speed up the build by hot deploying my application straight into [JBOSS]/server/default/deploy/myApp

It seems to work - but there also seems to be a somewhat arbitrary delay between the hard deploy and when JBoss starts using the new classes. I am not very familiar with JBoss, but I assume it caches classes, and that this is what causes the problem. 

Am I correct, and if so, how do I make JBoss flush it&#39;s cache?

Hot deploy on JBoss - how do I make JBoss &quot;see&quot; the change?

I&#39;ve just signed up to a site to purchase some goods, and when I tried to enter my (reasonably secure) password I was informed it was too long, and that I should enter a password between 5 &amp; 10 characters! What is the point in that? Who makes decisions like this? Surely the ideal password would be a really long and complicated one? Why do people insist on trying to restrict what types of passwords you can use?

Have you had to implement a login to a website? Was the login for secure purposes (e.g. purchasing goods). What (if any) restrictions did you place on the user&#39;s password? What were your reasons for the decision?

Why restrict the length of a password?

Which is the best Java memcached client, and why?

Java Memcached Client

I have an ASP.NET 3.5 Website (visual studio lingo), but the site continues to grow and is looking rather cowboyish among other things.  I&#39;d like to see this get converted into a Web Application (namespaces and all).

Is this something that can be easily done in Visual Studio?  If not, are there any other tools out there that could create all of the namespaces, etc. automagically?

How to convert ASP.NET website to ASP.NET web application

I&#39;m building a web application with Django. The reasons I chose Django were:

 - I wanted to work with free/open-source tools.
 - I like Python and feel it&#39;s a **long-term** language, whereas regarding Ruby I wasn&#39;t sure, and PHP seemed like a huge hassle to learn.
 - I&#39;m building a prototype for an idea and wasn&#39;t thinking too much about the future. Development speed was the main factor, and I already knew Python.
 - I knew the migration to Google App Engine would be easier should I choose to do so in the future.
 - I heard Django was &quot;nice&quot;.

Now that I&#39;m getting closer to thinking about publishing my work, I start being concerned about scale. The only information I found about the scaling capabilities of Django is provided by the Django team (I&#39;m not saying anything to disregard them, but this is clearly not objective information...).

**My questions:**

 - What&#39;s the &quot;largest&quot; site that&#39;s built on Django today? (I measure size mostly by user traffic)
 - Can Django deal with *100,000 users daily*, each visiting the site for a couple of hours?
 - Could a site like Stack Overflow run on Django?

Does Django scale?

What causes this error, how can I fix it?

&gt; Detailed Error Information  
Module IIS Web Core   
Notification BeginRequest   
Handler Not yet determined   
Error Code 0x8007052e   
Config Error Can not log on locally to C:\inetpub\wwwroot as user administrator with virtual directory password    
Config File Unavailable (Config Isolation)  
Requested URL http://192.168.0.3:80/  
Physical Path C:\inetpub\wwwroot  
Logon Method Not yet determined  
Logon User Not yet determined  

 Config Source

    &lt;application path=&quot;/&quot; applicationPool=&quot;PS-Extranet&quot;&gt;
        &lt;virtualDirectory path=&quot;/&quot; physicalPath=&quot;%SystemDrive%\inetpub\wwwroot&quot; userName=&quot;administrator&quot; password=&quot;[enc:AesProvider:PrISRz2ggJH4bV46ktObfCSh91Y/yF9pAoLmH7eCnj0=:enc]&quot; /&gt;
    &lt;/application&gt;


  

How do I resolve &quot;HTTP Error 500.19 - Internal Server Error&quot; on IIS7.0

Is the `WEB-INF` folder in the `CLASSPATH` of a Java Web application?

Is WEB-INF in the CLASSPATH?

I&#39;m having this weird problem making my project Maven-based. I created a new **Maven** project in Eclipse and enabled the Dynamic Web facets. But during runtime now it throws `ClassNotFoundException` because the Maven dependencies are not copied to `WEB-INF/lib` directory. I even tried adding the *copy-dependencies* section in POM, but it didn&#39;t help.

Someone [here][1] seemed to have solved this the right way, but I guess he forgot to mention the solution ::(

  [1]: http://www.coderanch.com/t/488042/tools/maven-web-inf

Maven dependencies not visible in WEB-INF/lib

After these questions:

- https://stackoverflow.com/questions/8589315/jsf2-dynamic-template
- https://stackoverflow.com/questions/8786793/dynamic-uiinclude
- https://stackoverflow.com/questions/8911985/how-can-i-retrieve-an-object-on-windowscoped
- https://stackoverflow.com/questions/8939037/how-can-i-check-if-an-object-stored-with-windowscoped-is-stored-correctly
- https://stackoverflow.com/questions/9001426/ice-faces-and-error-in-creation-of-a-bean-in-windowscoped

that I wrote all to resolve a &quot;stupid&quot; issue for the JSF2 framework, the fact that I can&#39;t link directly to a page stored in a `/WEB-INF` subfolder. After that I did some research on Google and Stackoverflow I would know a thing: How do I structure a JSF2 web project? 

In particular, where exactly do I put the XHTML pages?

Which XHTML files do I need to put in /WEB-INF and which not?

I&#39;m working on a Java EE web application with the following source code directory structure:

&lt;!-- language: lang-none --&gt;

    src/main/java                 &lt;-- multiple packages containing Java classes
    src/test/java                 &lt;-- multiple packages containing JUnit tests
    src/main/resources            &lt;-- includes properties files for textual messages
    src/main/webapp/resources     &lt;-- includes CSS, images and all Javascript files
    src/main/webapp/WEB-INF
    src/main/webapp/WEB-INF/tags
    src/main/webapp/WEB-INF/views

The folder I&#39;m interested in is `WEB-INF`: It contains `web.xml`, XML files for setting up servlets, Spring bean wiring contexts and JSP tags and views. I&#39;m trying to understand what constrains/defines this structure. E.g. do JSP files always have to be within `WEB-INF` or could they be somewhere else? And is there anything else that might go in `WEB-INF`? Wikipedia&#39;s [WAR files](http://en.wikipedia.org/wiki/WAR_file_format_%28Sun%29) entry mentions `classes` for Java classes and `lib` for JAR files - not sure I&#39;ve fully grasped when these would be needed in addition to the other source file locations.

Content Type	Original Author	Original Content on Stackoverflow
Question	euphoria83	View Question on Stackoverflow
Solution 1 - Servlets	Andy White	View Answer on Stackoverflow
Solution 2 - Servlets	Jon Skeet	View Answer on Stackoverflow
Solution 3 - Servlets	Churro	View Answer on Stackoverflow
Solution 4 - Servlets	Özmen Adıbelli	View Answer on Stackoverflow
Solution 5 - Servlets	Rachit Mishra	View Answer on Stackoverflow

What does WEB-INF stand for in a Java EE web application?

Servlets Problem Overview

Servlets Solutions

Solution 1 - Servlets

Solution 2 - Servlets

Solution 3 - Servlets

Solution 4 - Servlets

Solution 5 - Servlets

How to get a list of column names

I wrote a program that allow two classes to "fight". For whatever reason C# always wins. What's wrong with VB.NET?

Attributions