java文件复制方法_Java复制文件–用Java复制文件的4种方法

好的，我会为您解答关于Java文件复制的问题。

Java复制文件有多种方法，以下是其中的四种方法：

1. 使用Java IO流

public static void copyFileUsingStream(File source, File dest) throws IOException {
    InputStream is = null;
    OutputStream os = null;
    try {
        is = new FileInputStream(source);
        os = new FileOutputStream(dest);
        byte[] buffer = new byte[1024];
        int length;
        while ((length = is.read(buffer)) > 0) {
            os.write(buffer, 0, length);
        }
    } finally {
        is.close();
        os.close();
    }
}

2. 使用Java NIO

public static void copyFileUsingChannel(File source, File dest) throws IOException {
    FileChannel sourceChannel = null;
    FileChannel destChannel = null;
    try {
        sourceChannel = new FileInputStream(source).getChannel();
        destChannel = new FileOutputStream(dest).getChannel();
        destChannel.transferFrom(sourceChannel, 0, sourceChannel.size());
    } finally {
        sourceChannel.close();
        destChannel.close();
    }
}

3. 使用Java 7的Files类

public static void copyFileUsingJava7Files(File source, File dest) throws IOException {
    Files.copy(source.toPath(), dest.toPath());
}

4. 使用Apache Commons IO库

public static void copyFileUsingApacheCommonsIO(File source, File dest) throws IOException {
    FileUtils.copyFile(source, dest);
}

以上是四种Java文件复制的方法，您可以根据自己的实际需求选择适合的方法。希望能对您有所帮助。