文件以及文件夹的复制

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/**
 * 文件复制
 *
 * @param oldPath 原地址
 * @param newPath 新地址
 */
public static void copyFile(String oldPath, String newPath) {
    File file = new File(oldPath);
    try {
        if (file.exists()) {
            InputStream inputStream = new FileInputStream(file);
            OutputStream outputStream = new FileOutputStream(newPath);
            byte[] b = new byte[1024];
            int len = 0;
            while ((len = inputStream.read(b)) != -1) {
                outputStream.write(b, 0, len);
            }
            inputStream.close();
            outputStream.close();
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
}

/**
 * 文件夹复制
 *
 * @param oldPath 原地址
 * @param newPath 新地址
 */
public static void copyFolder(String oldPath, String newPath) {
    try {
        new File(newPath).mkdirs();
        String[] strings = new File(oldPath).list();
        File tem;
        for (int i = 0; i < strings.length; i++) {
            if (oldPath.endsWith(File.separator)) {
                tem = new File(oldPath + strings[i]);
            } else {
                tem = new File(oldPath + File.separator + strings[i]);
            }
            if (tem.isFile()) {
                InputStream inputStream = new FileInputStream(tem);
                OutputStream outputStream = new FileOutputStream(newPath + "/" + tem.getName());
                byte[] b = new byte[1024];
                int len = 0;
                while ((len = inputStream.read(b)) != -1) {
                    outputStream.write(b, 0, len);
                }
                inputStream.close();
                outputStream.close();
            }
            if (tem.isDirectory()) {
                copyFolder(oldPath + "/" + strings[i], newPath + "/" + strings[i]);
            }
        }
    } catch (Exception e) {
        System.out.println("复制失败");
        e.printStackTrace();
    }
}