I have an application, in that am uploading mp4 and flv video files. In case, if the user changed the extension of some other file as 'mp4'/'flv' means the file is uploaded and the video is not playing. How can I check the mime type of mp4/flv video files in java.
I am struggling with this please anyone can help me to complete this task.
If you have Java 7, then you can make use of Files.probeContentType(path).
import java.nio.file.*;
public class MimeTypes {
public static void main(String[] args) {
Path path;
try {
path = Paths.get("/etc");
System.out.println( path + " : " + Files.probeContentType(path) );
path = Paths.get("/dev/null");
System.out.println( path + " : " + Files.probeContentType(path) );
path = Paths.get("/var/log/syslog.2.gz");
System.out.println( path + " : " + Files.probeContentType(path) );
path = Paths.get("/var/run/rpcbind.sock");
System.out.println( path + " : " + Files.probeContentType(path) );
path = Paths.get("abc.mp4");
System.out.println( path + " : " + Files.probeContentType(path) );
path = Paths.get("MimeTypes.java");
System.out.println( path + " : " + Files.probeContentType(path) );
} catch (Exception x) {
}
}
}
Output:
# java MimeTypes
/etc : inode/directory
/dev/null : inode/chardevice
/var/log/syslog.2.gz : application/x-gzip
/var/run/rpcbind.sock : inode/socket
abc.mp4 : video/mp4
MimeTypes.java : text/x-java
Oracle documentation of Files is here.
Another option: Apache Tika
Apache Tika is a toolkit for detecting and extracting metadata and structured text content from various documents using existing parser libraries. Tika has a lot of dependencies ... almost 20 jars ! But it can do a lot more than detecting filetype. For example, you can parse a PDF or DOC to extract the text and the metadata very easily.
public static void main(String args[]) throws Exception {
FileInputStream is = null;
try {
File f = new File("C:/Temp/mime/abc.mp4");
is = new FileInputStream(f);
ContentHandler contenthandler = new BodyContentHandler();
Metadata metadata = new Metadata();
metadata.set(Metadata.RESOURCE_NAME_KEY, f.getName());
Parser parser = new AutoDetectParser();
// OOXMLParser parser = new OOXMLParser();
parser.parse(is, contenthandler, metadata);
System.out.println("Mime: " + metadata.get(Metadata.CONTENT_TYPE));
System.out.println("Title: " + metadata.get(Metadata.TITLE));
System.out.println("Author: " + metadata.get(Metadata.AUTHOR));
System.out.println("content: " + contenthandler.toString());
}
catch (Exception e) {
e.printStackTrace();
}
finally {
if (is != null) is.close();
}
}
