在Java中获取文件的Mime类型

import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.HashMap;
import java.util.Map;

public class MimeTypeDetector {

    private static final Map<String, String> MIME_TYPES = new HashMap<>();

    static {
        MIME_TYPES.put("txt", "text/plain");
        MIME_TYPES.put("html", "text/html");
        MIME_TYPES.put("css", "text/css");
        MIME_TYPES.put("js", "application/javascript");
        MIME_TYPES.put("json", "application/json");
        MIME_TYPES.put("png", "image/png");
        MIME_TYPES.put("jpg", "image/jpeg");
        MIME_TYPES.put("jpeg", "image/jpeg");
        MIME_TYPES.put("gif", "image/gif");
        MIME_TYPES.put("bmp", "image/bmp");
        MIME_TYPES.put("pdf", "application/pdf");
        MIME_TYPES.put("doc", "application/msword");
        MIME_TYPES.put("docx", "application/vnd.openxmlformats-officedocument.wordprocessingml.document");
        MIME_TYPES.put("xls", "application/vnd.ms-excel");
        MIME_TYPES.put("xlsx", "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
        MIME_TYPES.put("ppt", "application/vnd.ms-powerpoint");
        MIME_TYPES.put("pptx", "application/vnd.openxmlformats-officedocument.presentationml.presentation");
        MIME_TYPES.put("mp3", "audio/mpeg");
        MIME_TYPES.put("mp4", "video/mp4");
        MIME_TYPES.put("avi", "video/x-msvideo");
        MIME_TYPES.put("flv", "video/x-flv");
        MIME_TYPES.put("3gp", "video/3gpp");
        MIME_TYPES.put("mkv", "video/x-matroska");
        MIME_TYPES.put("wmv", "video/x-ms-wmv");
    }

    public static void main(String[] args) throws IOException {
        String filePath = "path/to/your/file";
        String mimeType = getMimeType(filePath);
        System.out.println("MIME type of the file: " + mimeType);
    }

    public static String getMimeType(String filePath) throws IOException {
        Path path = Paths.get(filePath);
        String extension = Files.probeContentType(path);
        if (extension == null) {
            extension = filePath.substring(filePath.lastIndexOf(".") + 1);
        }
        return MIME_TYPES.getOrDefault(extension.toLowerCase(), "application/octet-stream");
    }
}