Metadata Extraction - Java

Question

I'm trying to create a program that extracts the metadata from an image file. So far, I've managed to create a program that prints out all the metadata, but I can't figure out how to specify the program to print out only certain things (File name, latitude, longitude, date accessed). I've been trying to get my head around it for the past four hours. Here is the code I have so far..... Main Class: ``` package metadata; import com.drew.metadata.exif.*; import com.drew.metadata.iptc.*; import com.drew.metadata.jpeg.*; public class MetaData { public static void main(String[] args) { ExtractTags extractAllTags = new ExtractTags(); //extractAllTags.getTags(); System.out.println("

Has this "); extractAllTags.getLatitude(); } } ``` Second Class: ``` package metadata; import com.drew.imaging.ImageMetadataReader; import com.drew.imaging.ImageProcessingException; import com.drew.metadata.Directory; import com.drew.metadata.Metadata; import com.drew.metadata.Tag; import com.drew.metadata.ex…

Accepted Answer

You can get the `Directory` subclass of your choice by using `Metadata.getDirectory(Class)`. Each type of `Directory` has an associated `Descriptor` you can use to interpret the raw data of the `Directory`.

For example, latitude can be obtained from the `GpsDirectory` using a `GpsDescriptor` like this:

```
GpsDirectory gpsDir = (GpsDirectory) metadata.getFirstDirectoryOfType(GpsDirectory.class);

if (gpsDir != null) {
    GpsDescriptor gpsDesc = new GpsDescriptor(gpsDir);
    System.out.println("Latitude: " + gpsDesc.getGpsLatitudeDescription());
}
```

See the documentation for the specific type of `Descriptor` you are using to see the methods it provides to get the data you want.

Metadata Extraction - Java

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