ClassLoader.getSystemResourceAsStream not working when running on tomcat

Question

I am loading a configfile using ClassLoader.getSystemResourceAsStream. The file is placed in the src folder of my GWT application. It ends up in war/WEB-INF/classes. I copy the war folder to tomcat under webapps/MyApp. When running the application, getSystemResourceAsStream throws an exception. When running under Jetty it works fine.

score 3 · Accepted Answer · edited May 23 '17 at 11:55

3

Try:

getClass().getClassLoader().getResourceAsStream();

It will definitely work; I also had same type of problem. This question describes why you are having that problem.

edited May 23 '17 at 11:55

Community

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answered May 10 '11 at 08:44

Ankit

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Thanks... I am trying different solutions for more than 4 hours... this answer works for me... – Manan Shah Dec 12 '17 at 07:33

WhiteFang34 · Answer 2 · 2011-05-10T08:39:30.693

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Try getClass().getResourceAsStream() instead. You need to call this method to access the class loader for your web application. The method you're calling uses the system class loader, which I believe is only going to contain the classes for the web container itself.

edited May 10 '11 at 08:39

answered May 10 '11 at 08:34

WhiteFang34

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ClassLoader.getResourceAsStream() is not a static method so I can not call it that way. – Alex May 10 '11 at 08:37
Updated answer, use `getClass().getResourceAsStream()`. – WhiteFang34 May 10 '11 at 08:38
What happens? Does it work under Jetty? Perhaps you can include in your question the relevant lines of code. – WhiteFang34 May 10 '11 at 08:47
It works under Jetty. I think it throws and IOException under Tomcat. – Alex May 10 '11 at 09:02

score 1 · Answer 3 · answered May 10 '11 at 08:49

This should work:

Thread.currentThread().getContextClassLoader().getResourceAsStream( "relative/path" );

Note that relative/path is a path relative to war/WEB-INF/classes E.g. if your file is war/WEB-INF/classes/resources/my.properties then use "resources/my.properties"

ClassLoader.getSystemResourceAsStream not working when running on tomcat

3 Answers3