对ClassLoader.getResourceAsStream（）或Class.getResourceAsStream（）进行故障排除

Question

I work on an application where the war has a directory structure like the following:

ear/war/modules/configuration/gsrc/<java packages start here>

However, I want to dynamically read a file that lives here:

/ear/war/modules/configuration/some/other/dir/somefile.csv

I have tried many permutations of the normal ClassLoader.getResourceAsStream() and Class.getResourceAsStream() to try to get a handle to that resource all of which come up with null such as:

ClassLoader.getResourceAsStream("/modules/configuration/some/other/dir/somefile.csv")
ClassLoader.getResourceAsStream("/configuration/some/other/dir/somefile.csv")
ClassLoader.getResourceAsStream("/some/other/dir/somefile.csv")
Class.getResourceAsStream("../some/other/dir/somefile.csv")
Class.getResourceAsStream("../../some/other/dir/somefile.csv")
Class.getResourceAsStream("../../../some/other/dir/somefile.csv")

My assumption is I'm using a classloader who's root scope is the gsrc directory where the code lives. What is the appropriate way to troubleshoot this?

For instance I was hoping I could print out something like ClassLoader.rootDirectory() to figure out what the root directory of the classloader is. Then I could print out the root dir of this classloader and it's parent(s), etc.

The runtime is jetty locally, but websphere in all other regions.

Answer 1

My Eclipse project has the following structure:

C:\\workspace\\ProjectName\\src\\com\\my\\package\\resources\\myfile.properties

So, to actually load this file I'm doing this:

getClass().getResourceAsStream("/com/my/package/resources/myfile.properties")

I hope this example can help you.

Answer 2

Either put the file in WEB-INF and access it from a servlet using

getServletContext().getResourceAsStream("/WEB-INF/somefile.csv");

or place it anywhere on the filesystem and access it either with the Java File API or Apache commons-io .