The first:
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Scanner;
class the CopyFile {public
public static void main (String [] args) throws IOException {
Scanner sc = new new Scanner (System.in);
System.out.println ( "Please enter the file name:"); // absolute console input file or relative path
String sc.next S = ();
// String S = "writer.txt";
file file = new new file (S); // determine whether the file
Boolean file.canExecute Boo = ();
the InputStream = the FileInputStream new new IS (S);
IF (== Boo to true) {
String = file.getAbsolutePath STR () Replace ( "W", "copy_w");.
//System.out.println(str);
File = copyFile new file (str); // file copy
copyFile.createNewFile ();
OutputStream os = new FileOutputStream(str);
int n = 0;
while((n = is.read()) != -1){
os.write(n);
}
System.out.println("复制成功");
}
}
}
The second:
java.io.File Import;
Import java.io.FileInputStream;
Import java.io.FileNotFoundException;
Import java.io.FileOutputStream;
Import java.io.IOException;
Import java.util.Scanner;
/ **
* Copy the pictures, because copy the same place so different file names;
*
* @author L
*
* /
public class CopyFileTwo {
static void main public (String [] args) throws IOException {
Scanner Scanner new new SC = (the System.in);
System.out.println ( "Please enter a file name"); // address of the file entry input console
String s = sc.next ();
file file = new new file (S);
copyFile (file); // pass in the original document
}
public static void copyFile (file file) throws IOException {
/ *
* function: the parameter file transfer go in, get the new file a name change completion
* Next to copy the original content into a new file to
* /
file files = the Check (file);
IF (! files = null) {
FileInputStream fi = new new FileInputStream (file. getAbsoluteFile ());
a FileOutputStream new new OS = a FileOutputStream (files.getAbsoluteFile ());
= 0 n-int;
the while ((n-fi.read = ()) = -1!) {
os.write (n-);
}
fi.close ();
os.close ();
}
}
public static Check File (File file) throws IOException {
/ *
* accepts a file, determine whether the document, if there is a return copy_ prefix plus empty file
* If it does not null
* /
System.out.println (File.Exists ());
IF (File.Exists ()) {
String file.getParent STR = () + "\\ Copy_" + file.getName ();
File = file2 new new File (STR);
file2.createNewFile ();
return file2;
}
the else {
System.out.println ( "not this file");
return null;
}
}
}
