I assume you're using maven (based on the paths in your project). The classes
directory under WEB-INF
should be on the classpath when your web application is loaded, so try the following:
InputStream is = ServiceUtils.class.getResourceAsStream("/myproj.properties");
Note that this assumes you have myproj.properties
in either your src/main/resources
or src/test/resources
directory (it will automatically get copied to WEB-INF/classes
when maven builds the war or runs the tests).