Getting Mime type in Java

In this tutorial, I am showing how to get mime type of a file in java using Java 7 Files and URLConnection class.

You can select right one from the below listed, which suits your needs.

Using Java 7 Files.probeContentType

// using java 7 probeContentType
	String mimeType = Files.probeContentType(path);
	System.out.println(mimeType);

Using With URLConnection getContentType

// getContentType
	URLConnection connection = file.toURL().openConnection();
	System.out.println(connection.getContentType());

Using URLConnection guessContentTypeFromName

// guessContentTypeFromName
	System.out.println(URLConnection.guessContentTypeFromName(file.getName()));

Using URLConnection getFileNameMap

// getFileNameMap
	System.out.println(URLConnection.getFileNameMap().getContentTypeFor(file.getName()));

You can find the complete example of finding mimes type of a file below with all the above described ways.

package com.javatips;

import java.io.File;
import java.io.IOException;
import java.net.URLConnection;
import java.nio.file.Files;
import java.nio.file.Path;

public class MimeExample {

    public static void main(String[] args) throws IOException {
	File file = new File("java.png");
	Path path = file.toPath();

	// using java 7 probeContentType
	String mimeType = Files.probeContentType(path);
	System.out.println(mimeType);

	// getContentType
	URLConnection connection = file.toURL().openConnection();
	System.out.println(connection.getContentType());

	// guessContentTypeFromName
	System.out.println(URLConnection.guessContentTypeFromName(file.getName()));

	// getFileNameMap
	System.out.println(URLConnection.getFileNameMap().getContentTypeFor(file.getName()));

    }

}

Output

image/png
image/png
image/png
image/png