在Java中實現分詞搜索查詢功能通常可以使用開源的分詞工具,比如使用Lucene或者Elasticsearch。
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.queryparser.classic.QueryParser;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.ScoreDoc;
import org.apache.lucene.search.TopDocs;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.RAMDirectory;
public class LuceneExample {
public static void main(String[] args) {
try {
// 創建索引
Directory directory = new RAMDirectory();
Analyzer analyzer = new StandardAnalyzer();
IndexWriter indexWriter = new IndexWriter(directory, analyzer, IndexWriter.MaxFieldLength.UNLIMITED);
Document doc = new Document();
doc.add(new Field("content", "Hello World", Field.Store.YES, Field.Index.ANALYZED));
indexWriter.addDocument(doc);
indexWriter.commit();
indexWriter.close();
// 搜索
IndexSearcher indexSearcher = new IndexSearcher(directory);
QueryParser parser = new QueryParser("content", analyzer);
Query query = parser.parse("Hello");
TopDocs topDocs = indexSearcher.search(query, 10);
ScoreDoc[] scoreDocs = topDocs.scoreDocs;
for (ScoreDoc scoreDoc : scoreDocs) {
Document document = indexSearcher.doc(scoreDoc.doc);
System.out.println(document.get("content"));
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.search.builder.SearchSourceBuilder;
public class ElasticsearchExample {
public static void main(String[] args) {
try {
RestHighLevelClient client = new RestHighLevelClient(RestClient.builder(new HttpHost("localhost", 9200, "http")));
SearchRequest searchRequest = new SearchRequest("index_name");
SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
searchSourceBuilder.query(QueryBuilders.matchQuery("content", "Hello"));
searchRequest.source(searchSourceBuilder);
SearchResponse searchResponse = client.search(searchRequest, RequestOptions.DEFAULT);
for (SearchHit hit : searchResponse.getHits().getHits()) {
Map<String, Object> sourceAsMap = hit.getSourceAsMap();
System.out.println(sourceAsMap.get("content"));
}
client.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
以上代碼示例演示了如何使用Lucene和Elasticsearch實現分詞搜索查詢功能。通過使用這些開源工具,可以方便地實現復雜的文本搜索功能。