我不确定6.5中的所有内容都改变了,但下面是Lucene 6.0.0的代码和6.5.0的编译/运行。
IndexCreation
import java.io.File;
import java.io.IOException;
import org.apache.lucene.analysis.core.SimpleAnalyzer;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.IndexWriterConfig;
import org.apache.lucene.index.IndexWriterConfig.OpenMode;
import org.apache.lucene.store.FSDirectory;
public class IndexCreator {
public static IndexWriter getWriter() throws IOException{
File indexDir = new File("D:\\Experiment");
SimpleAnalyzer analyzer = new SimpleAnalyzer();
IndexWriterConfig indexWriterConfig = new IndexWriterConfig(analyzer);
indexWriterConfig.setOpenMode(OpenMode.CREATE_OR_APPEND);
IndexWriter indexWriter = new IndexWriter(FSDirectory.open(indexDir
.toPath()), indexWriterConfig);
indexWriter.commit();
return indexWriter;
}
}
现在你可以使用这个作家指数使用writer.updateDocument(...)
writer.addDocument(...)
方法您的文档。
字段可以被添加到文件象下面,
doc.add(new Field("NAME", "Tom", new FieldType(TextField.TYPE_STORED)));
搜索
import java.io.IOException;
import java.nio.file.Paths;
import org.apache.lucene.document.Document;
import org.apache.lucene.index.DirectoryReader;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.Term;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.ScoreDoc;
import org.apache.lucene.search.TopDocs;
import org.apache.lucene.search.WildcardQuery;
import org.apache.lucene.store.FSDirectory;
public class LuceneSearcher {
public static void searchIndex() throws IOException{
IndexReader reader = DirectoryReader.open(FSDirectory.open(Paths.get("D:\\Experiment")));
IndexSearcher searcher = new IndexSearcher(reader);
TopDocs hits = searcher.search(new WildcardQuery(new Term("NAME", "*")), 20);
if (null == hits.scoreDocs || hits.scoreDocs.length <= 0) {
System.out.println("No Hits1 Found");
return;
}
System.out.println(hits.scoreDocs.length + " hits1 Docs found !!");
for (ScoreDoc hit : hits.scoreDocs) {
Document doc = searcher.doc(hit.doc);
}
reader.close();
}
}
搜索器代码假定您有NAME
索引文档作为字段名。
我想,这应该足以让你开始。
让我知道你是否需要别的东西。
我有这些Maven依赖,
<dependencies>
<dependency>
<groupId>org.apache.lucene</groupId>
<artifactId>lucene-core</artifactId>
<version>6.5.0</version>
</dependency>
<dependency>
<groupId>org.apache.lucene</groupId>
<artifactId>lucene-analyzers-common</artifactId>
<version>6.5.0</version>
</dependency>
<dependency>
<groupId>org.apache.lucene</groupId>
<artifactId>lucene-queryparser</artifactId>
<version>6.5.0</version>
</dependency>
</dependencies>
所以,你正在寻找创建索引,以及该版本的搜索代码?我想,你的问题中的JPA部分与你所面对的问题无关,我是否正确? –