Java Io stream operations, copying (multiple files), deleting, cutting, and downloading Network Resources

Public class fileutil {

// Copy an object
Public void copyfile (string source, string DEST ){
File sourcefile = new file (source );
File destfile = new file (DEST + "/" + sourcefile. getname ());

Try {
Fileinputstream FCM = new fileinputstream (sourcefile );
Fileoutputstream Fos = new fileoutputstream (destfile );
Bufferedinputstream Bis = new bufferedinputstream (FCM );
Bufferedoutputstream Bos = new bufferedoutputstream (FOS );

Int Len = 0;
Byte [] B = new byte [1024];
While (LEN = bis. Read (B ))! =-1 ){
Bos. Write (B, 0, Len );
}

Bos. Close ();
Bis. Close ();
FOS. Close ();
FCM. Close ();

} Catch (filenotfoundexception e ){
E. printstacktrace ();
} Catch (ioexception e ){
// Todo auto-generated Catch Block
E. printstacktrace ();
}
}

// Copy files and folders
Public void copyfield (string source, string DEST ){
File sourcefile = new file (source );
// Copy a folder
If (sourcefile. isdirectory ()){
String [] names = sourcefile. List ();
File file = new file (DEST + "/" + sourcefile. getname ());
If (! File. exists ()){
File. mkdir ();
}
For (string name: names ){
Copyfield (source + "/" + name, file. getpath ());
}
}
// Copy a file
Else {
This. copyfile (source, DEST );
}
}

// Delete files and folders
Public void deletefield (string source ){
File sourcefile = new file (source );
// Folder
If (sourcefile. isdirectory ()){
String [] names = sourcefile. List ();
// Delete the subfiles and subfolders in the current folder
For (string name: names ){
Deletefield (source + "/" + name );
}
// Delete the current folder
Sourcefile. Delete ();
}
// File
Else {
Sourcefile. Delete ();
}
}

// Cut the file and folder
Public void cutfield (string source, string DEST ){
// Copy a folder
// Delete a folder
}

// Download resources from the network
Public void download (URL ){
Try {
Inputstream is = URL. openstream ();
Fileoutputstream Fos = new fileoutputstream ("E:/123.gif ");
Bufferedinputstream Bis = new bufferedinputstream (is );
Bufferedoutputstream Bos = new bufferedoutputstream (FOS );

Byte [] B = new byte [1024];
Int Len = 0;
While (LEN = bis. Read (B ))! =-1 ){
Bos. Write (B, 0, Len );
}

Bos. Close ();
Bis. Close ();
FOS. Close ();
Is. Close ();
} Catch (ioexception e ){
// Todo auto-generated Catch Block
E. printstacktrace ();
}

}

}

Import java. Io. bufferedreader;

Import java. Io. fileinputstream;

Import java. Io. fileoutputstream;

Import java. Io. filereader;

Import java. Io. filewriter;

Import java. Io. inputstreamreader;

Import java. Io. printwriter;

 

Public class iotest {

Public staticvoid main (string [] ARGs) throws exception {

Stringstr = "Chinese ";

/* Fileoutputstreamfos = newfileoutputstream ("1.txt ");

FOS. Write (Str. getbytes ("UTF-8 "));

FOS. Close ();*/

/* Filewriterfw = new filewriter ("1.txt ");

FW. Write (STR );

FW. Close ();*/

Printwriterpw = new printwriter ("1.txt"," UTF-8 ");

PW. Write (STR );

PW. Close ();

/* Filereaderfr = new filereader ("1.txt ");

Char [] Buf = new char [1024];

Int Len = Fr. Read (BUF );

Stringmystr = new string (BUF, 0, Len );

System. Out. println (mystr );*/

/* Fileinputstreamfr = new fileinputstream ("1.txt ");

Byte [] Buf = new byte [1, 1024];

Int Len = Fr. Read (BUF );

Stringmystr = new string (BUF, 0, Len, "UTF-8 ");

System. Out. println (mystr );*/

Bufferedreaderbr = new bufferedreader (

Newinputstreamreader (

Newfileinputstream ("1.txt")," UTF-8"

)

);

Stringmystr = Br. Readline ();

BR. Close ();

System. Out. println (mystr );

}

 

}