IO流--创建文件夹，复制移动文件

创建多级文件夹

final String ROOTPATH = "/Users/mac/Downloads"; // 默认文件下载的位置
    @Test //创建多级文件夹
    public void test1() {
        String path = "com.id1.3rd"; // 这是文件夹，用.分割
        String[] split = path.split("\\.");
        String fullPath = ROOTPATH;
        for (String s : split) {
            fullPath += "/" + s;
            File file = new File(fullPath);
            file.mkdir();
        }

复制移动文件到文件夹

/**
 * @param file 被移动的文件
 * @param dictionary 移动到的目标文件夹
 */
public void copyAndRemoveFile1(String file, String dictionary) {
    try {
        FileInputStream in = new FileInputStream(file);
        FileOutputStream out = new FileOutputStream(dictionary+file.substring(file.lastIndexOf("/"),file.length()));
        int len = 0;
        byte[] buffer = new byte[1024];
        while ((len = in.read(buffer)) != -1) {
            out.write(buffer, 0, len);
        }
    } catch (IOException e) {
        e.printStackTrace();
    }
}

@Test
public void test1() {
    String file = "/Users/mac/Desktop/artifactIdApplication.java"; // 必须是文件，不可以是文件夹
    String dictionary = "/Users/mac/Desktop/未命名文件夹"; // 文件夹
    copyAndRemoveFile1(file,dictionary);
}