io流

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文件拷贝

public static void main(String[] args) {
    String src = "C:\\Users\\10995\\Desktop\\iotest\\bbb.txt";
    String dest = "C:\\Users\\10995\\Desktop\\iotest\\aaa.txt";
    copy(new File(src), new File(dest));
}
private static void copy(File srcFile, File destFile) {
    try (BufferedInputStream input = new BufferedInputStream(new FileInputStream(srcFile));
         BufferedOutputStream output = new BufferedOutputStream(new FileOutputStream(destFile))) {
        byte[] b = new byte[1024 * 1024];//1m
        int length;
        while ((length = input.read(b)) > 0) {
            output.write(b, 0, length);
        }
    } catch (IOException e) {
        e.printStackTrace();
    }
}

 

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