title: Easiest way to compare two Excel files in Java?
body: <p>I'm writing a JUnit test for some code that produces an Excel file (which is binary). I have another Excel file that contains my expected output. What's the easiest way to compare the actual file to the expected file?</p>
  
  <p>Sure I could write the code myself, but I was wondering if there's an existing method in a trusted third-party library (e.g. Spring or Apache Commons) that already does this.</p>