JAVA获取文件的mimeType

		<dependency>
            <groupId>net.sf.jmimemagic</groupId>
            <artifactId>jmimemagic</artifactId>
            <version>0.1.5</version>
        </dependency>

Magic parser = new Magic() ;  
// getMagicMatch accepts Files or byte[], 
// which is nice if you want to test streams 
MagicMatch match = parser.getMagicMatch(new File("korbin.jpg"), false);  
System.out.println(match.getMimeType()) ;