掌握使用 GroupDocs.Metadata 在 Java 中提取 EPUB 元数据

<repositories>
   <repository>
      <id>repository.groupdocs.com</id>
      <name>GroupDocs Repository</name>
      <url>https://releases.groupdocs.com/metadata/java/</url>
   </repository>
</repositories>

<dependencies>
   <dependency>
      <groupId>com.groupdocs</groupId>
      <artifactId>groupdocs-metadata</artifactId>
      <version>24.12</version>
   </dependency>
</dependencies>

import com.groupdocs.metadata.Metadata;

public class InitializeGroupDocs {
    public static void main(String[] args) {
        Metadata metadata = new Metadata("path/to/your/file.epub");
        // Proceed with your operations on metadata.
    }
}

import com.groupdocs.metadata.Metadata;
import com.groupdocs.metadata.core.EpubRootPackage;

public class EpubMetadataVersion {
    public static void main(String[] args) {
        try (Metadata metadata = new Metadata("YOUR_DOCUMENT_DIRECTORY/yourfile.epub")) {
            // Proceed to extract version information.
        }
    }
}

EpubRootPackage root = metadata.getRootPackageGeneric();
String epubVersion = root.getEpubPackage().getVersion();

System.out.println("EPUB Version: " + epubVersion);

import com.groupdocs.metadata.Metadata;
import com.groupdocs.metadata.core.EpubRootPackage;

public class EpubMetadataUniqueIdentifier {
    public static void main(String[] args) {
        try (Metadata metadata = new Metadata("YOUR_DOCUMENT_DIRECTORY/yourfile.epub")) {
            // Proceed to extract unique identifier.
        }
    }
}

EpubRootPackage root = metadata.getRootPackageGeneric();
String uniqueIdentifier = root.getEpubPackage().getUniqueIdentifier();

System.out.println("Unique Identifier: " + uniqueIdentifier);

import com.groupdocs.metadata.Metadata;
import com.groupdocs.metadata.core.EpubRootPackage;

public class EpubMetadataImageCover {
    public static void main(String[] args) {
        try (Metadata metadata = new Metadata("YOUR_DOCUMENT_DIRECTORY/yourfile.epub")) {
            // Proceed to check for image cover.
        }
    }
}

EpubRootPackage root = metadata.getRootPackageGeneric();
byte[] imageCover = root.getEpubPackage().getImageCover();

if (imageCover != null) {
    System.out.println("Image Cover Found, Size: " + imageCover.length);
} else {
    System.out.println("No Image Cover Present.");
}