Write a method to copy the file

In Java to implement a copy within a file, you need to create a new file method:

File File=new file ("Wubin.txt");

And without this file, you need to create this file:

File.createnewfile ();

Of course, you can create directly in the file stream directly:

FileInputStream fis=new FileInputStream ("Wubin.txt");

This means creating a Wubin.txt file in this directory, then creating a inputstreamreader to get the content, and then using a buffered bufferreader to do a speed optimization:

InputStreamReader isr=new InputStreamReader (FIS);

bufferedreader br=new BufferedReader (ISR);

Finally, the Read method of BR is used.

Well, if we're going to give the read to a new file, that is, create a file that will give the file the contents of a new file:

FileOutputStream fos=new FileOutputStream ("Wubin1.txt");

outputstreamwriter opw=new outputstreamwriter (FOS);

bufferedwriter bw=new bufferedwriter (OPW);

Finally, the BW write method is written in.

The problem comes, responsible for a file can also, if it is more than a file to be responsible, very cumbersome, and troublesome,

So I wrote a copy of the method, so that the operation of the simple words, define a new class, in the class, define a new method copy{}:

Class copa{

public void copy (File file,file file1,string s1,string s2) {

try {

file=new file (S1);

file.createnewfile ();

file1=new File (S2);

file1.createnewfile ();

} catch (IOException E2) {

e2.printstacktrace ();

}

try {

fileinputstream fis=new fileinputstream (file);

inputstreamreader isr=new inputstreamreader (FIS);

BufferedReader br= new BufferedReader (ISR);

//shangmians read out, here is the write

fileoutputstream fos=new fileoutputstream (file1);

outputstreamwriter opw=new outputstreamwriter (FOS);

bufferedwriter bw=new bufferedwriter (OPW);

char[] b=new char[100];

try {

Br.read (b);

// System.out.println (b);

} catch (IOException e) {

e.printstacktrace ();

}

try {

Bw.write (new String (b));

} catch (IOException E1) {

e1.printstacktrace ();

}

try {

bw.close ();

br.close ();

isr.close ();

fis.close ();

} catch (IOException e) {

e.printstacktrace ();

}

} catch (FileNotFoundException e) {

e.printstacktrace ();

}

}

}

Novice to explore, new method copy, defined two folder File,file1, defined two file name: S1,S2

To invoke in the Main method:

File File=new file ("");

File File3=new file ("");

Copa Copa=new Copa ();

Copa.copy (file, File3, "Jixixin.txt", "chengxia.txt");

System.out.println ("successfully created");

After that, a successful copy is made, and a encapsulated method is implemented to make the file copy simple.

Write a method to copy the file