zip解压

public static void unzip(Path zipFilePath, Path unzipDirPath) throws IOException {
    try (ZipInputStream zis = new ZipInputStream(Files.newInputStream(zipFilePath), Charset.forName("GBK"))) {
        ZipEntry zipEntry = zis.getNextEntry();
        while (zipEntry != null) {
            Path newFilePath = unzipDirPath.resolve(zipEntry.getName());
            if (zipEntry.isDirectory()) {
                Files.createDirectories(newFilePath);
            } else {
                Files.createDirectories(newFilePath.getParent());
                Files.copy(zis, newFilePath, StandardCopyOption.REPLACE_EXISTING);
            }
            zipEntry = zis.getNextEntry();
        }
        zis.closeEntry();
    }
}

• zipFilePath是要解压的文件路径

• unzipDirPath是解压后文件要存放的位置

遍历某个文件夹

/**
 * 遍历文件夹下的所有文件
 * @param directory
 * @return
 * @throws IOException
 */
public static List<String> listFilesInDirectory(String directory) throws IOException {
    List<String> filePaths = new ArrayList<>();

    Files.walkFileTree(Paths.get(directory), new SimpleFileVisitor<Path>() {
        @Override
        public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
            filePaths.add(file.toString());
            return FileVisitResult.CONTINUE;
        }

        @Override
        public FileVisitResult visitFileFailed(Path file, IOException exc) throws IOException {
            return FileVisitResult.CONTINUE;
        }
    });

    return filePaths;
}

• directory是文件夹路径

路径，文件名，文件扩展名相关操作

/**
 * 获取路径中的文件名
 * @param filePath   文件名
 * @return
 */
public static String extractBetweenLastSlashAndDot(String filePath) {
    int lastSlashIndex = filePath.lastIndexOf('/');
    int lastDotIndex = filePath.lastIndexOf('.');

    if (lastSlashIndex == -1 || lastDotIndex == -1 || lastDotIndex <= lastSlashIndex) {
        return ""; // 无效情况处理
    }

    return filePath.substring(lastSlashIndex + 1, lastDotIndex);
}

/**
 * 获取最后一个点之前的所有字符串
 * @param str
 * @return
 */
public static String getStringBeforeLastDot(String str) {
    int lastDotIndex = str.lastIndexOf('.');

    if (lastDotIndex == -1) {
        return str; // 如果没有找到点，返回原始字符串
    }

    return str.substring(0, lastDotIndex);
}

/**
 * 获取最后一个/之后的所有字符串
 * @param str
 * @return
 */
public static String getStringAfterLastSlash(String str) {
    int lastSlashIndex = str.lastIndexOf('/');

    if (lastSlashIndex == -1) {
        return str; // 如果没有找到斜杠，返回原始字符串
    }

    return str.substring(lastSlashIndex + 1);
}

/**
 * 获取文件扩展名
 */
public static String getFileType(String filePath) {
    if (filePath == null || filePath.isEmpty()) {
        return ""; // 如果文件路径为空，返回空字符串
    }

    int lastDotIndex = filePath.lastIndexOf('.');
    if (lastDotIndex == -1 || lastDotIndex == filePath.length() - 1) {
        return ""; // 如果没有找到点或点在最后，返回空字符串
    }

    return filePath.substring(lastDotIndex + 1);
}