如何在 Java 中使用 GroupDocs 比较 Word 文档

<dependency>
    <groupId>com.groupdocs</groupId>
    <artifactId>groupdocs-comparison</artifactId>
    <version>25.2</version>
</dependency>

Comparer comparer = new Comparer();
comparer.setLicense("path/to/license.json");

InputStream source = new FileInputStream("source.docx");
InputStream target = new FileInputStream("target.docx");

comparer.add(source);
comparer.add(target);

StyleSettings style = new StyleSettings();
style.getInsertedItemStyle().setHighlightColor(Color.YELLOW);
style.getInsertedItemStyle().setFontColor(Color.BLUE);

OutputStream result = new FileOutputStream("comparison.docx");
comparer.compare(style, result);

style.getDeletedItemStyle().setHighlightColor(Color.PINK);
style.getChangedItemStyle().setFontColor(Color.RED);

File sourceFile = new File("/absolute/path/source.docx");

System.setProperty("java.opts", "-Xmx4G");

for (Pair<File, File> pair : documentPairs) {
    // reuse comparer instance
}

CompletableFuture.runAsync(() -> comparer.compare(style, result));

@Service
public class DocumentComparisonService { … }

if (!allowedExtensions.contains(fileExtension)) {
    throw new IllegalArgumentException("Unsupported file type");
}

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

<dependencies>
   <dependency>
      <groupId>com.groupdocs</groupId>
      <artifactId>groupdocs-comparison</artifactId>
      <version>25.2</version>
   </dependency>
</dependencies>

import com.groupdocs.comparison.Comparer;

try (Comparer comparer = new Comparer("path/to/source/document")) {
    // Add target document for comparison
    comparer.add("path/to/target/document");
    
    // If this runs without exceptions, you're good to go!
    System.out.println("GroupDocs.Comparison initialized successfully!");
}

String sourceFilePath = "YOUR_DOCUMENT_DIRECTORY/SOURCE_WORD";
String targetFilePath = "YOUR_DOCUMENT_DIRECTORY/TARGET1_WORD";
String outputFilePath = "YOUR_OUTPUT_DIRECTORY/CompareDocumentsSettingsStream.result.docx";

try (InputStream sourceStream = new FileInputStream(sourceFilePath);
     InputStream targetStream = new FileInputStream(targetFilePath);
     OutputStream resultStream = new FileOutputStream(outputFilePath)) {
    // Comparison logic goes here...
}

try (Comparer comparer = new Comparer(sourceStream)) {
    comparer.add(targetStream);
    
    // Ready for styling configuration...
}

import com.groupdocs.comparison.options.style.StyleSettings;

StyleSettings insertedItemStyle = new StyleSettings.Builder()
    .setHighlightColor(Color.RED)        // Background highlight
    .setFontColor(Color.GREEN)           // Text color
    .setUnderline(true)                  // Add underline
    .build();

import com.groupdocs.comparison.options.CompareOptions;

CompareOptions compareOptions = new CompareOptions.Builder()
    .setInsertedItemStyle(insertedItemStyle)
    .build();

comparer.compare(resultStream, compareOptions);

// Style for inserted items (additions)
StyleSettings insertedStyle = new StyleSettings.Builder()
    .setHighlightColor(Color.GREEN)
    .setFontColor(Color.WHITE)
    .setBold(true)
    .build();

// Style for deleted items (removals)  
StyleSettings deletedStyle = new StyleSettings.Builder()
    .setHighlightColor(Color.RED)
    .setStrikethrough(true)
    .build();

CompareOptions options = new CompareOptions.Builder()
    .setInsertedItemStyle(insertedStyle)
    .setDeletedItemStyle(deletedStyle)
    .build();

// Instead of this:
String path = "document.docx";

// Use this:
String path = Paths.get("src", "test", "resources", "document.docx").toString();

java -Xmx2G -jar your-application.jar

// Always use try-with-resources for automatic cleanup
try (Comparer comparer = new Comparer(sourceStream)) {
    // Comparison logic
} // Comparer is automatically closed here

public void compareBatch(List<DocumentPair> documents, int batchSize) {
    for (int i = 0; i < documents.size(); i += batchSize) {
        List<DocumentPair> batch = documents.subList(i, 
            Math.min(i + batchSize, documents.size()));
        processBatch(batch);
        // Force garbage collection between batches
        System.gc();
    }
}

CompletableFuture<String> future = CompletableFuture.supplyAsync(() -> {
    // Perform document comparison
    return performComparison(sourceDoc, targetDoc);
});

@Service
public class DocumentComparisonService {
    
    public ComparisonResult compareDocuments(DocumentRequest request) {
        try (Comparer comparer = new Comparer(request.getSourceStream())) {
            comparer.add(request.getTargetStream());
            
            CompareOptions options = buildCompareOptions(request.getStylePreferences());
            ByteArrayOutputStream resultStream = new ByteArrayOutputStream();
            
            comparer.compare(resultStream, options);
            
            return ComparisonResult.builder()
                .resultDocument(resultStream.toByteArray())
                .comparisonMetadata(extractMetadata(comparer))
                .build();
        }
    }
}

public boolean isValidDocument(InputStream documentStream) {
    // Check file size limits
    // Validate file format
    // Scan for malicious content
    return true; // Simplified for example
}