javaIO之文本复制

package cn.com.hu;


import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;


public class copeFile {


/**
* @param args
*/
public static void main(String[] args) {
FileInputStream f1=null;
FileOutputStream f2=null;

try {
f1=new FileInputStream("D:/f1.txt");
f2=new FileOutputStream("D:/f2.txt");
File f=new File("f1.txt");
       byte array[]=new byte[(int)f.length()];
int len=0;
if ((len=f1.read(array))!=0) {
f2.write(array);
System.out.println("文件已经成功复制");

} 
}catch (FileNotFoundException e) 
{
System.out.println("文件不存在");
}
catch(IOException e)
{
e.printStackTrace();
}
finally{
try {
f1.close();
f2.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}


}

}


}