How to Create a Temporary Directory/Folder in Java

How to create a temporary directory/folder in Java?

If you are using JDK 7 use the new Files.createTempDirectory class to create the temporary directory.

Path tempDirWithPrefix = Files.createTempDirectory(prefix);

Before JDK 7 this should do it:

public static File createTempDirectory()
    throws IOException
{
    final File temp;

    temp = File.createTempFile("temp", Long.toString(System.nanoTime()));

    if(!(temp.delete()))
    {
        throw new IOException("Could not delete temp file: " + temp.getAbsolutePath());
    }

    if(!(temp.mkdir()))
    {
        throw new IOException("Could not create temp directory: " + temp.getAbsolutePath());
    }

    return (temp);
}

You could make better exceptions (subclass IOException) if you want.

create a temporary file with a specified name in java

You can directly give the location and file name or You can access local filesystem and find the temp directory

 String tempDir=System.getProperty("java.io.tmpdir");

you can use temp directory and your custom file name.

public static void main(String[] args) {
    try {
        String tempDir=System.getProperty("java.io.tmpdir");
        String sCourrier ="sahu";
        File file = new File(tempDir+"newfile.txt");
        FileOutputStream fos = new FileOutputStream(file);
        fos.write(sCourrier.getBytes());
    } catch (IOException e) {
        e.printStackTrace();
    }

Creating temp Folder in java

You are almost done with create tempfolder, see this:

import java.io.File;
import java.io.IOException;

public class TempFolder {
    public static void main(String[] args) throws IOException {
        File file = File.createTempFile("my_prefix", "");
        System.out.println(file.getAbsolutePath() + " isFile: " + file.isFile() + " isDir:" + file.isDirectory());
        file.delete();
        file.mkdir();
        System.out.println(file.getAbsolutePath() + " isFile: " + file.isFile() + " isDir:" + file.isDirectory());
    }
}

first createTempFile will make a real file for you, just remove it and make a directory using the same name.

I use osx, too. My result is:

/var/folders/aQ/aQLNlFLOF28xewK2A7i0X++++TM/-Tmp-/my_prefix8720723534029791962 isFile: true isDir:false
/var/folders/aQ/aQLNlFLOF28xewK2A7i0X++++TM/-Tmp-/my_prefix8720723534029791962 isFile: false isDir:true

how can I create a temporary folder in java 6?

I've never seen a good solution for this, but this is how I've done it.

File temp = File.createTempFile("folder-name","");
temp.delete();
temp.mkdir();

How to create temporary directory structure with files

If I understand your question right, I think using more of what the File class has to offer will help. See http://docs.oracle.com/javase/7/docs/api/java/io/File.html

I think you would have a more typical approach if you tried something like this:

File tempfldr = new File("C:\\rootFolder\\childFolder1");
tempfldr.mkdirs();
File tempfldr2 = new File("C:\\rootFolder\\childFolder2");
tempfldr2.mkdirs();
File child1 = File.createTempFile("prefix_val", "suffix_val", tempfldr);
File child2 = File.createTempFile("prefix_val", "suffix_val", tempfldr2);

How to create temporary folder with zip folder inside

Using zip4j you can do something like this -

ZipFile zipFile = new ZipFile(source);
ZipParameters parameters = new ZipParameters();

zipFile.addFolder(dirPath);

Here source is the Path of your zip file that you said already exists.

How to copy the zip file to this destination. you can do in many ways..Simplest is --

org.apache.commons.io.FileUtils.copyFile(File, File)

FileUtils.copyFile(new File("/sourcefolder/some.zip"), 
   new File("/destination/some.zip"))

Environment variable to control java.io.tmpdir?

Hmmm -- since this is handled by the JVM, I delved into the OpenJDK VM source code a little bit, thinking that maybe what's done by OpenJDK mimics what's done by Java 6 and prior. It isn't reassuring that there's a way to do this other than on Windows.

On Windows, OpenJDK's get_temp_directory() function makes a Win32 API call to GetTempPath(); this is how on Windows, Java reflects the value of the TMP environment variable.

On Linux and Solaris, the same get_temp_directory() functions return a static value of /tmp/.

I don't know if the actual JDK6 follows these exact conventions, but by the behavior on each of the listed platforms, it seems like they do.

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