I have been using a specific piece of code to delete files from a folder but it is proving very problematic because maybe I forgot to close an InputStream or two. The code I have is so big that I am not be able to see all the Inputstreams that I have not closed. Is there a way of deleting files whether there is an open InputStream or not?
This is the piece of the code that I have been using;
File fin = new File("C:/ABC Statements final/");
File[] finlist = fin.listFiles();
for (int n = 0; n < finlist.length; n++) {
if (finlist[n].isFile()) {
System.gc();
Thread.sleep(2000);
finlist[n].delete();
}
}
I have edited the code. This version works.
There is no InputStream instances in the provided chunk of code.
To not write lots of untested IO code, please take a look at the apache.commons.io project. Especially at the FileDeleteStrategy class, for file deletion operations.
Your code might look like that:
File fin = new File("C:/ABC Statements final/");
for (File file : fin.listFiles()) {
FileDeleteStrategy.FORCE.delete(file);
}
You can use:
FileUtils.deleteDirectory(File directory)
from Apache Commons
With Apache Commons IO:
File dir = ...
FileUtils.deleteQuietly(dir);
dir.mkdirs();
No need to check for exceptions this way.
Use:
import org.apache.commons.io.FileUtils;
FileUtils.cleanDirectory(fin);
Docs:
/**
* Clean a directory without deleting it.
*
* @param directory directory to clean
* @throws IOException in case cleaning is unsuccessful
*/
In order to use it you need a dependency:
Maven:
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>2.6</version>
</dependency>
Gradle:
compile 'commons-io:commons-io:2.6'
public void removeDir()
{
try
{
File dir = new File((System.getProperty("user.dir")+"/ReportFolderToMail"+timeStamp));
if (dir.isDirectory())
{
File[] files = dir.listFiles();
if (files != null && files.length > 0)
{
for (File aFile : files)
{
System.gc();
Thread.sleep(2000);
FileDeleteStrategy.FORCE.delete(aFile);
System.out.println("delet file" +aFile);
}
}
dir.delete();
System.out.println("delet" +dir);
}
else
{
dir.delete();
}
}
catch(Exception e)
{
e.printStackTrace();
}
public boolean removeDir()
{
try
{
//destFile = new File((System.getProperty("user.dir")+"/FileName"))
// checks if the directory has any file
File dir = destFile;
if (dir.isDirectory())
{
File[] files = dir.listFiles();
if (files != null && files.length > 0)
{
for (File aFile : files)
{
System.gc();
Thread.sleep(2000);
FileDeleteStrategy.FORCE.delete(aFile);
System.out.println("delet file" +aFile);
}
}
dir.delete();
System.out.println("delet" +dir);
}
else
{
dir.delete();
}
}
catch(Exception e)
{
logger.log(LogStatus.FATAL, "Exception Occured While Deleting Folder : " +e);
}
return true;
}