Question

The FileUtils.writeStringToFile(fileName, text) function of Apache Commons I/O overwrites previous text in a file. I would like to append data to my file. Is there any way I could use Commons I/O for the same? I can do it using normal BufferedWriter from Java but I’m curious regarding the same using Commons I/O.

Answer 1

It has been implemented in 2.1 version of Apache IO.
To append string to the file just pass true as an additional parameter in functions:

• FileUtils.writeStringToFile
• FileUtils.openOutputStream
• FileUtils.write
• FileUtils.writeByteArrayToFile
• FileUtils.writeLines

ex:

    FileUtils.writeStringToFile(file, "String to append", true);