Copy Directory Java Recursively

Copy Directory Java Recursively

In below sample java class you will see how to copy directory recursively. This examples copies all file which is inside directory and sub directories.

• Using pure Java approach :

package com.javahonk;

import java.io.File;
import java.io.IOException;
import java.nio.file.Files;

public class CopyDirectory {	

	public static void main(String[] args) {		
		
		try {
			File sourceDirectory =  new File("C:\\JavaHonk\\zip\\SpringMVCRESTFulService");
			File destinationDirectory =  new File("C:\\JavaHonk\\zip\\SpringMVCRESTFulServiceCopy");
			copyFolderRecursively(sourceDirectory, destinationDirectory);
			System.out.println("Dirctory copied successfully to desination: "+destinationDirectory.getAbsolutePath());
		} catch (Exception e) {
			e.printStackTrace();
		}		
		
	}

	private static void copyFolderRecursively(File sourceDirectory, File destinationDirectory) throws Exception {
		
		if (!sourceDirectory.exists()) {
			throw new Exception(("Source directory not exists:" +sourceDirectory.getAbsolutePath()));
		}
		
		if (!sourceDirectory.isDirectory()) {
			throw new Exception(("Source directory is not directory:" +sourceDirectory.getAbsolutePath()));
		}
		
		if (destinationDirectory.exists()) {
			throw new Exception(("Destination directory already exists:" +sourceDirectory.getAbsolutePath()));
		}else {
			destinationDirectory.mkdirs();
			File[] files = sourceDirectory.listFiles();
		    
		    for( File file : files ) {
		      if( file.isDirectory() ) {
		    	  copyFolderRecursively( file, new File( destinationDirectory, file.getName()));
		      } else {
		        copyFileToDestination( file, new File( destinationDirectory, file.getName() ) );
		      }
		    }
		}
		
	}
	
	private static final void copyFileToDestination(File sourceFile, File destinationFile) throws IOException {

		Files.copy(sourceFile.toPath(), destinationFile.toPath());
	}
}

• Output:

• Copy directory using Apache commons (Preferred approach). Include commons-io-x.x.jar in your class path:

package com.javahonk;

import java.io.File;

import org.apache.commons.io.FileUtils;

public class CopyDirectoryUsingApacheCommon {

	public static void main(String[] args) {		
		
		try {
			
			File sourceDirectory =  new File("C:\\JavaHonk\\zip\\SpringMVCRESTFulService");
			File destinationDirectory =  new File("C:\\JavaHonk\\zip\\SpringMVCRESTFulServiceCopy");
			
			FileUtils.copyDirectory(sourceDirectory, destinationDirectory);
			
			System.out.println("Dirctory copied successfully to desination: "+destinationDirectory.getAbsolutePath());
			
		} catch (Exception e) {
			e.printStackTrace();
		}		
	}	

}

• Output:

For more information about copy directory please refer oracle documentation here