每24小时删除目录中的所有文件，但不删除该目录

Question

I am looking to do some java, that will delete all the contents of a directory every 24 hours, what is the best approach to doing this? I have found a lot of ways using php but not java.

Answer 1

what is the best aproach to doing this

Assuming that you really need to do this in Java:

1. Write a java method that iterates over the files in a directory using (for example) File.listFiles() . For each one call File.delete() . (If the directory contains subdirectories, it will be a bit more complicated ... depending on what you want to happen for the subdirectories.

2. Write some java code that calls the previous method once every 24 hours.

References:

• The javadocs for java.io.File
• The javadoc for java.util.Timer which can be used to run a task periodically.

Alternatively, you might be able to find some existing code using Google. (But I'm not going to look for you.)

Answer 2

I know you said java ... but.. If you are using unix use crontab

crontab -e

0 1 * * * rm -rf /path/to/mydir/*

Delete all files in your dir at 1am every night

Answer 3

And in a windows machine you can:

at 00:00 /every:M,T,W,Th,F,S,Su "cmd /c del /f/s/qc:\\path\\to\\dir"

Which deletes everything (including subdirectories) in c:\\path\\to\\dir quietly at 00:00 (midnight) everyday.

Use at /delete to disable the scheduled tasks.

You can read more about the At Utility here .