Java Multi-Folder merge __java

Has previously completed a single folder copy function, on this basis it is easy to implement a combination of multiple folders, set a For loop on it.

Package com.xx.test.copy;
Import Java.io.BufferedInputStream;
Import Java.io.BufferedOutputStream;
Import Java.io.File;
Import Java.io.FileInputStream;
Import java.io.FileNotFoundException;
Import Java.io.FileOutputStream;

Import java.io.IOException; public class Testcombinedirectory {/** * @param args */public static void main (string[] args) {string[]
		Sourcedirnames = {"D:/luceneex", "D:/luceneex2"};
		
		String targetdirname = "D:/luceneex_backup";
	Combinedirectory (Sourcedirnames,targetdirname); /** * Merge multiple folders into a folder * @param sourcedirnames * @param targetdirname/private static void Combinedirectory (S Tring[] Sourcedirnames,string targetdirname) {if (Sourcedirnames==null | | sourcedirnames.length==0) {throw new Run
		Timeexception ("folder to be merged does not exist ...");
		for (int i=0;i<sourcedirnames.length;i++) {copydir (sourcedirnames[i], targetdirname);
	System.out.println ("Merge all folders complete ..."); /** * Copy Directory, recursive method * @param sourcedirname * @param targetdirname */public static void Copydir (String sourcedirname, String targetdirname) {File SourceDir =
		New File (sourceDirName);
		
		File TargetDir = new file (targetdirname); if (Sourcedir==null | |!sourcedir.exists ()) {throw new RuntimeException ("The folder to be copied does not exist ..." +sourcedir.getabsolutepath ())
		;
		} if (!sourcedir.isdirectory ()) {throw new RuntimeException ("The file to be copied is not a directory ..." +sourcedir.getabsolutepath ());
		} if (!targetdir.exists ()) {targetdir.mkdirs ();
		
		} file[] files = sourcedir.listfiles (); for (int i=0;files!=null && i<files.length;i++) {if (Files[i].isfile ()) {//Copy file CopyFile (files[i)
				
			, New File (Targetdirname+file.separator+files[i].getname ())); }else if (files[i].isdirectory ()) {//Copy directory, recursive method//Copy directory String Dir1 = sourcedirname+file.separator+files[i]  
				. GetName ();  
                String Dir2 = Targetdirname+file.separator+files[i].getname ();  
			Copydir (Dir1, DIR2); } System. Out.println ("Copy folder successful ..." +sourcedir.getabsolutepath ()); /** * Copy Single file * @param sourcefile source file * @param targetfile target file/private static void CopyFile (file Sourcefil
		E, File targetfile) {fileinputstream in = null;
		Bufferedinputstream bis = null;
		FileOutputStream out = null;
		Bufferedoutputstream BOS = NULL;  
			try {//Create a new file input stream and buffer it in = new FileInputStream (sourcefile);  
  
			bis = new Bufferedinputstream (in);  
			Creates a new file output stream and buffers it out = new FileOutputStream (targetfile);  
			  
			BOS = new Bufferedoutputstream (out);  
			Buffer array byte[] b = New byte[1024 * 5];  
			int Len;  
			while (Len =bis.read (b))!=-1) {bos.write (b, 0, Len);  
			
		//Refresh the buffered output stream Bos.flush ();
		catch (FileNotFoundException e) {e.printstacktrace ();
		catch (IOException e) {e.printstacktrace ();
			}finally{try {if (bos!=null) bos.close ();
			catch (IOException e) {e.printstacktrace (); } try {if (biS!=null) Bis.close ();
			catch (IOException e) {e.printstacktrace ();
 }
		}
	}
}

There are wrong places to write or consider incomplete situation, but also please give us a lot of advice. Also, if you want to be more efficient, consider using NIO to complete a single file copy.