从战争中加载配置文件

Question

I have a Maven project that I'm trying to package as both a war and a jar. As part of my application / servlet initialisation (depending on whether I'm running the jar or the war), I need to read a file called server.ini . I've put the file in src/main/resources/server.ini and am trying to load it like so:

System.class.getResourceAsStream("server.ini");

However, this always results in null . What am I doing wrong?

Answer 1

The server.ini file should be in the root of a resources directory.

By placing it in the webapp you're making the file available via http , but you need it accessible on the classpath , which means that you should place it in the resources directory.

Answer 2

There's a good chance web.xml or context.xml is better suited to what you're trying to do, but...

Try putting server.ini in WEB-INF/classes , or do something like this .

Answer 3

The issue was that I was using the System classloader with an unqualified path, so it was expecting to find my server.ini in the java.lang package.

Since my file is in src/main/resources , I should just use the classloader of my current class, with an absolute path:

getClass().getResourceAsStream("/server.ini")

This works in both the war and the jar.

The " Preferred way of loading resources in Java " question has a great explanation of resource loading.