Using Java to implement the operation of the folder __java

1, copying folders

private void CopyFile (File sourcefile,file targetfile) {try {if (!sourcefile.exists ()) {return;
					}else{if (sourcefile.isdirectory ()) {if (!targetfile.exists ()) {targetfile.mkdirs ();
					} file[] List=sourcefile.listfiles ();
						for (file f:list) {file Newfile=new file (Targetfile,f.getname ());
					CopyFile (f, newFile);
					}}else{if (!targetfile.exists ()) {targetfile.createnewfile ();
					} fileinputstream input = new FileInputStream (sourcefile); Bufferedinputstream Inbuff = new Bufferedinputstream (input);
					Creates a new file output stream and buffers it fileoutputstream output = new FileOutputStream (targetfile); Bufferedoutputstream Outbuff = new Bufferedoutputstream (output);
					Buffer array byte[] b = New byte[1024 * 5]; int Len;
					Refreshes the output stream of this buffer while (len = Inbuff.read (b))!=-1) {outbuff.write (b, 0, Len); } outbuff.flush ();
					Close flow inbuff.close ();
					Outbuff.close ();
					Output.close ();
			Input.close ();	The catch (Exception e) {tools.errorlist (E), "Copy file"); }
	}

2. Delete Folder

private void DeleteFile (file file) {
		if (file.exists ()) {if (
			file.isfile ()) {
				file.delete ();
			} else if (file.isdirectory ()) {
				file files[] = File.listfiles ();               All documents under the Declaration directory files[];
				for (int i=0;i<files.length;i++) {            //traverse directory All Files
					deletefile (files[i]);             Each file is iterated with this method
			    }
			file.delete ();
	}

3, compressed folder

File Xmfile=new file (filepath+ "FileName");
file[] filelist = Xmfile.listfiles ();
Zipoutputstream Zos = new Zipoutputstream (New FileOutputStream (filepath+ "<span style=" font-family:arial, Helvetica , Sans-serif; " >filename.</span>zip "));
if (filelist.length!=0) {for
(int i = 0; i < filelist.length i++) {
zip.zipfile (Zos, filelist[i], ""); 
  
   }
zos.close ();
  

    Methods in the Zip class:

<pre name= "code" class= "html" >public static void ZipFile (Zipoutputstream output, file file, String BasePath) throws
        Exception {FileInputStream FIS = null;
        Bufferedinputstream bis = null;
                try {if (File.isdirectory ()) {//file is directory file list[] = File.listfiles (); BasePath = BasePath + (basepath.length () = = 0?
                "": "/") + File.getname ();
                for (File f:list) {zipfile (output, F, basepath); } else {//compressed file BasePath = (basepath.length () = 0?
                "": BasePath + "/") + File.getname ();
                Output.putnextentry (New ZipEntry (BasePath));
                FIS = new FileInputStream (file);
                bis = new Bufferedinputstream (FIS);
                byte[] buf = new byte[1024];
                int Len;
                while (len = Bis.read (buf))!=-1) {output.write (buf, 0, Len);
             }   Output.flush ();
        The catch (Exception ex) {throw ex;
            finally {if (bis!= null) {bis.close ();
            } if (FIS!= null) {fis.close (); }
        }
    }

<span style= "font-family:arial, Helvetica, Sans-serif; Background-color:rgb (255, 255, 255); >4, unzip zip file </span>

public static void Upzip (File unzipfile,file unzipfolder) throws exception{InputStream input = null;  
		  OutputStream output = null;
		  ZipFile zipfile = null;  try {zipfile = new ZipFile (unzipfile);  Create a ZIP file Object enumeration Zipenum = Zipfile.getentries ();  Gets the ZIP file entry Enumeration Object ZipEntry entry = null;  
				Define object String EntryName = null, PATH = NULL;  
				String names[] = null;  
				int length;  while (Zipenum.hasmoreelements ()) {//circular read Entry entry = (ZipEntry) zipenum.nextelement ();  
				    Gets the current entry EntryName = new String (Entry.getname ());  
				    names = Entryname.split ("\\/") with/delimited entry name;  
				    length = Names.length;
				    Path = Unzipfolder.getabsolutepath (); for (int v = 0; v < length; v++) {if (v < length-1) {//directory file Tempfile=new file before the last directory (
				    		Path + = "/" + Names[v] + "/");
				    		if (!tempfile.exists ()) {tempfile.mkdirs (); }}else {//Last 
				    		if (Entryname.endswith ("/")) {//is a directory, create the folder file Tempfile=new file (Unzipfolder.getabsolutepath () +
					    		"/" + EntryName);
					    		if (!tempfile.exists ()) {tempfile.mkdirs ();  
				    			}else {//is a file, output to file input = Zipfile.getinputstream (entry);  
				    			Output = new FileOutputStream (New File (Unzipfolder.getabsolutepath () + "/" + EntryName));  
				    			byte[] buffer = new byte[1024 * 8];  
				    			int readlen = 0;  
				    			while ((Readlen = input.read (buffer, 0, 1024 * 8))!=-1) {output.write (buffer, 0, Readlen);  
				    			} if (input!= null) input.close ();  
				    				if (output!= null) {Output.flush ();  
				    			Output.close ();
		  catch (Exception ex) {throw ex;  
				   Finally {try {if (input!= null) input.close ();  
				  if (output!= null) {  Output.flush ();  
				   Output.close (); 
				   } if (Zipfile!=null) {zipfile.close (); The catch (Exception e) {}}}

5, write the file into a binary stream string

public static String ziptostr (file file) throws exception{
		 stringbuffer suf = new StringBuffer ();
		 FileInputStream FIS = null;
                 int temp = 0;
                 FIS = new FileInputStream (file);
                 while (temp = Fis.read ())!=-1) {
        	<span style= "White-space:pre" >	</span>suf.append (temp);
        	<span style= "White-space:pre" >	</span>suf.append (",");
        <span style= "White-space:pre" >	</span>}
         <span style= "White-space:pre" >	</ Span>fis.close ();
		return suf.tostring ();
	 }

6. Convert binary stream to file

public static file Strtozip (String str,file file) throws exception{
		 fileoutputstream fos = new FileOutputStream (file) ;
		 string[] Str_arr = Str.split (",");
		 for (String V:str_arr) {
			fos.write (integer.valueof (v));
		 }
		 Fos.close ();
		 return file;
	 }