掌握 Java 全文搜索：使用 GroupDocs 实现日志文件提取器

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

<dependencies>
    <dependency>
        <groupId>com.groupdocs</groupId>
        <artifactId>groupdocs-search</artifactId>
        <version>25.4</version>
    </dependency>
</dependencies>

import com.groupdocs.search.extractors.TextExtractorBase;

public class LogExtractor extends TextExtractorBase {
    @Override
    public String[] getFileExtensions() {
        return new String[]{"log"};
    }

    @Override
    public String extractText(String documentContent) {
        // Custom logic for extracting text from log files.
        return documentContent; // Implement your custom extraction here.
    }
}

import com.groupdocs.search.Index;
import com.groupdocs.search.IndexSettings;

public class CustomTextExtractorFeature {
    public static void main(String[] args) {
        String indexFolder = "YOUR_OUTPUT_DIRECTORY";
        IndexSettings settings = new IndexSettings();
        
        // Adding the custom text extractor to the settings.
        settings.getCustomExtractors().addItem(new LogExtractor());
        
        // Creating or loading an index with specified settings and enabling auto-reindexing.
        Index index = new Index(indexFolder, settings, true);
    }
}

import com.groupdocs.search.Index;

public class AddDocumentsToIndexFeature {
    public static void main(String[] args) {
        String indexFolder = "YOUR_OUTPUT_DIRECTORY";
        String documentsFolder = "YOUR_DOCUMENT_DIRECTORY";
        
        // Loading or creating an index in the specified directory.
        Index index = new Index(indexFolder);
        
        // Adding documents from the folder to the index.
        index.add(documentsFolder);
    }
}

import com.groupdocs.search.Index;
import com.groupdocs.search.results.SearchResult;

public class SearchDocumentsFeature {
    public static void main(String[] args) {
        String indexFolder = "YOUR_OUTPUT_DIRECTORY";
        
        // Loading the existing index.
        Index index = new Index(indexFolder);
        
        // Define search queries
        String query1 = "objection";
        String query2 = "log";
        
        // Performing searches and retrieving results.
        SearchResult result1 = index.search(query1);
        SearchResult result2 = index.search(query2);
    }
}