Java复制文件

public static void copyFile(File sourceFile, File targetFile){
try {
//新建文件输入流并对它进行缓冲
FileInputStream input = new FileInputStream(sourceFile);
BufferedInputStream inBuff=new BufferedInputStream(input);

//新建文件输出流并对它进行缓冲
FileOutputStream output = new FileOutputStream(targetFile);
BufferedOutputStream outBuff=new BufferedOutputStream(output);

//缓冲数组
byte[] b = new byte[1024 * 5];
int len;
while ((len =inBuff.read(b)) != -1) {
outBuff.write(b, 0, len);
}
//刷新此缓冲的输出流
outBuff.flush();
//关闭流
inBuff.close();
outBuff.close();
output.close();
input.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}