Single file or picture upload (Java)

public void UploadFile () {

UploadFile file = GetFile ("Batfile", "Images");

File Source = File.getfile ();

String fileName = File.getfilename ();

String extension = filename.substring (Filename.lastindexof ("."));

String prefix;

if (". png". Equals (extension) | | ". jpg". Equals (extension) | | ". gif". Equals (extension)) {

prefix = "Images";

FileName = Webutils.uuid () + extension;

}else{

prefix = "Files";

}

Jsonobject json = new Jsonobject ();

try {

FileInputStream fis = new FileInputStream (source);

File TargetDir = new file (Propkit.use ("Config.properties"). Get ("File.path") + prefix + "/");

if (!targetdir.exists ()) {

Targetdir.mkdirs ();

}

File target = new file (TargetDir, fileName);

if (!target.exists ()) {

Target.createnewfile ();

}

FileOutputStream fos = new FileOutputStream (target);

byte[] BTS = new byte[300];

while (Fis.read (BTS, 0, 300)! =-1) {

Fos.write (BTS, 0, 300);

}

Fos.close ();

Fis.close ();

Json.put ("Error", "Success");

Json.put ("url", prefix + "/" + fileName);

Source.delete ();

} catch (FileNotFoundException e) {

Json.put ("Error", 1);

Json.put ("message", "Upload error, please upload later");

} catch (IOException e) {

Json.put ("Error", 1);

Json.put ("message", "File Write server error, please upload later");

}

Renderjson (Propkit.use ("Config.properties"). Get ("File.path") + "files/" + fileName);

}

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Single file or picture upload (Java)