Read and Write to Java file via Resource

Question

I'm trying to read and write to a file but I'd like to access that file via Resource.

This is what I do

File f = new File(ClassLoader.getSystemResource("/blah/blah/Properties.prop").toURI()); BufferedReader br = new BufferedReader(new FileReader(f)); String line = br.readLine();  PrintWriter p = new PrintWriter(new File(ClassLoader.getSystemResource("/blah/blah/Properties.prop").toURI())); 

but neither seems correct. What is the correct way to do this?

Answer 1

For input, try below:

     InputStreamReader isReader =                        new InputStreamReader(                           this.getClass().getResourceAsStream(templateName));       BufferedReader br = new BufferedReader(isReader);      

or

     InputStreamReader isReader =                        new InputStreamReader(                           <youclassName>.class.getResourceAsStream(templateName));       BufferedReader br = new BufferedReader(isReader);    

For output, try below:

      PrintWriter writer =                 new PrintWriter(                      new File(this.getClass().getResource(templateName).getPath())); 

Answer 2

All solution above show how you can receive access to your resources in build folder. It means that resources have been moved to build directory with .class files.
If you need to write some files into resources for saving them after terminated program, then you will have to describe path starting with root project:

./src/main/resources/foo.ext

This solving generally not recommended but may be necessary in other cases.