Re: Housing and reading internal resources using Tomcat 8.5.4 and JDK 1.8
Hi Chris,
Thank you for the responses, yes those both help. I did a lot of reading
yesterday and was unable to get a clear answer at how this should be done
with JEE, where internal resource files are expected to reside (besides
just generally being under WEB-INF) within the deployment, and the String
value that should be given to ClassLoader.getResource(value) to be able to
look them up. Hence why I reached out to the mailing list.
I have in fact created a properties directory under WEB-INF/classes, for
organizing purposes, and ClassLoader.getResource("properties/xyz.txt") does
appear to be working.
Thank you, Doug
On Tue, Aug 30, 2016 at 11:27 AM, Christopher Schultz <
ch...@christopherschultz.net> wrote:
> -BEGIN PGP SIGNED MESSAGE-
> Hash: SHA256
>
> Doug,
>
> On 8/29/16 6:29 PM, Doug Gschwind wrote:
> > Hello everyone,
> >
> > I have a file xyz.txt that is specific to my web application which
> > needs to be located by my web application, and I wish to find that
> > resource via getClass().ClassLoader().getResource("xyz.txt") at
> > runtime. The xyz.txt file has no relation to any particular Java
> > class in our application. This resource is used internally by the
> > application and should not be served directly by the container to
> > inbound HTTP requests, therefore I have it located in the
> > WEB-INF/properties directory of my web app deployment. However, the
> > getResource("xyz.txt") method returns null, even though my xyz.txt
> > file is certainly where it is expected to be found.
> >
> > Where should I place this file ideally, and given that file exists
> > in that location, what is the parameter value I need to pass to
> > getResource() so it returns a non-null value?
>
> - From a servlet, you'll want to to:
>
>URL url =
> getServletContext().getResource("/WEB-INF/properties/xyz.txt");
>
> If you don't have access to any of the servlet API objects, you might
> have to move your properties file into the WEB-INF/classes/ directory,
> or into a JAR file in the WEB-INF/lib/ directory. Then you can do this:
>
> URL url =
> Thread.currentThread().getContextClassLoader().getResource("/xyz.txt");
>
> Then do whatever you want with that URL. For example:
>
> Properties props = new Properties();
> try(InputStream in = url.openStream()) {
> props.load(in);
> }
>
> // Now use your properties
>
> Hope that helps,
> - -chris
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Re: Housing and reading internal resources using Tomcat 8.5.4 and JDK 1.8
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA256
Doug,
On 8/29/16 6:29 PM, Doug Gschwind wrote:
> Hello everyone,
>
> I have a file xyz.txt that is specific to my web application which
> needs to be located by my web application, and I wish to find that
> resource via getClass().ClassLoader().getResource("xyz.txt") at
> runtime. The xyz.txt file has no relation to any particular Java
> class in our application. This resource is used internally by the
> application and should not be served directly by the container to
> inbound HTTP requests, therefore I have it located in the
> WEB-INF/properties directory of my web app deployment. However, the
> getResource("xyz.txt") method returns null, even though my xyz.txt
> file is certainly where it is expected to be found.
>
> Where should I place this file ideally, and given that file exists
> in that location, what is the parameter value I need to pass to
> getResource() so it returns a non-null value?
- From a servlet, you'll want to to:
URL url =
getServletContext().getResource("/WEB-INF/properties/xyz.txt");
If you don't have access to any of the servlet API objects, you might
have to move your properties file into the WEB-INF/classes/ directory,
or into a JAR file in the WEB-INF/lib/ directory. Then you can do this:
URL url =
Thread.currentThread().getContextClassLoader().getResource("/xyz.txt");
Then do whatever you want with that URL. For example:
Properties props = new Properties();
try(InputStream in = url.openStream()) {
props.load(in);
}
// Now use your properties
Hope that helps,
- -chris
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Re: Housing and reading internal resources using Tomcat 8.5.4 and JDK 1.8
> Hello everyone,
>
> I have a file xyz.txt that is specific to my web application which needs
to
> be located by my web application, and I wish to find that resource via
> getClass().ClassLoader().getResource("xyz.txt") at runtime. The xyz.txt
> file has no relation to any particular Java class in our application.
This
> resource is used internally by the application and should not be served
> directly by the container to inbound HTTP requests, therefore I have it
> located in the WEB-INF/properties directory of my web app deployment.
> However, the getResource("xyz.txt") method returns null, even though my
> xyz.txt file is certainly where it is expected to be found.
>
> Where should I place this file ideally, and given that file exists in
that
> location, what is the parameter value I need to pass to getResource() so
it
> returns a non-null value?
>
> Thanks, Doug
Hi,
the file must be present in classpath. For a webapp that means
WEB-INF/classes. When you place it not in a sub dir you must pass
"/xyz.txt" to getResource() (note the leading slash).
If you use eclipse for development you can create a "source folder" and
place it there. eclipse will take care of copying it to WEB-INF/classes.
Other IDEs or build tools call that a resources dir. In maven it defaults
to src/main/resources.
Regards,
Christoph
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Housing and reading internal resources using Tomcat 8.5.4 and JDK 1.8
Hello everyone,
I have a file xyz.txt that is specific to my web application which needs to
be located by my web application, and I wish to find that resource via
getClass().ClassLoader().getResource("xyz.txt") at runtime. The xyz.txt
file has no relation to any particular Java class in our application. This
resource is used internally by the application and should not be served
directly by the container to inbound HTTP requests, therefore I have it
located in the WEB-INF/properties directory of my web app deployment.
However, the getResource("xyz.txt") method returns null, even though my
xyz.txt file is certainly where it is expected to be found.
Where should I place this file ideally, and given that file exists in that
location, what is the parameter value I need to pass to getResource() so it
returns a non-null value?
Thanks, Doug
