使用Java复制文件 [英] copy file using Java

问题描述

我使用以下代码使用Java将文件从一个位置复制到另一位置:

i''m copying a file from one location to another using java using the following code:

InputStream fis = new FileInputStream(sourceFile);
OutputStream fos = new FileOutputStream(destFile);
byte[] databuf = new byte[1024];
int length;
while ((length = fis.read(databuf)) > 0) {

fos.write(databuf, 0, length);

}
fis.close();
fos.close();

但是此程序不能像Windows资源管理器一样快地复制文件.
谁能解释原因?
我的代码或方法有问题吗?
还建议我是否还有其他更好的(有效)方法.

But this program does not copy the file as fast as the windows explorer.
can anyone explain the reason?
is something wrong with my code or my approach?
Also suggest me if there is any other better(efficient) way of doing the same.

推荐答案

来自库通用I/O [

Copying a File or Directory - The Java Tutorials[^]

That should kind of explain the action.

so I would use Files.copy(InputStream in, Path target, CopyOption... options) with the new Java7

or FileUtils.copyFile(new File("in.txt"), new File("out.txt")); from the lib commons I/O[^], which is anyway a pretty nice lib for file operations.

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