Hi, all:
I am Using version 5.5.4, and find can't delete a document via the
IndexWriter.deleteDocuments(term) method.
Here is the test code:
import org.apache.lucene.analysis.core.SimpleAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.document.FieldType;
import org.apache.lucene.index.*;
import org.apache.lucene.queryparser.classic.ParseException;
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.store.Directory;
import org.apache.lucene.store.FSDirectory;
import java.io.IOException;
import java.nio.file.Paths;
public class TestSearch {
static SimpleAnalyzer analyzer = new SimpleAnalyzer();
public static void main(String[] argvs) throws IOException, ParseException {
generateIndex("5836962b0293a47b09d345f1");
query("5836962b0293a47b09d345f1");
delete("5836962b0293a47b09d345f1");
query("5836962b0293a47b09d345f1");
}
public static void generateIndex(String id) throws IOException {
Directory directory = FSDirectory.open(Paths.get("/tmp/test/lucene"));
IndexWriterConfig config = new IndexWriterConfig(analyzer);
IndexWriter iwriter = new IndexWriter(directory, config);
FieldType fieldType = new FieldType();
fieldType.setStored(true);
fieldType.setIndexOptions(IndexOptions.DOCS_AND_FREQS_AND_POSITIONS_AND_OFFSETS);
Field idField = new Field("_id", id, fieldType);
Document doc = new Document();
doc.add(idField);
iwriter.addDocument(doc);
iwriter.close();
}
public static void query(String id) throws ParseException, IOException {
Query query = new QueryParser("_id", analyzer).parse(id);
Directory directory = FSDirectory.open(Paths.get("/tmp/test/lucene"));
IndexReader ireader = DirectoryReader.open(directory);
IndexSearcher isearcher = new IndexSearcher(ireader);
ScoreDoc[] scoreDoc = isearcher.search(query, 100).scoreDocs;
for(ScoreDoc scdoc: scoreDoc){
Document doc = isearcher.doc(scdoc.doc);
System.out.println(doc.get("_id"));
}
}
public static void delete(String id){
try {
Directory directory =
FSDirectory.open(Paths.get("/tmp/test/lucene"));
IndexWriterConfig config = new IndexWriterConfig(analyzer);
IndexWriter iwriter = new IndexWriter(directory, config);
Term term = new Term("_id", id);
iwriter.deleteDocuments(term);
iwriter.commit();
iwriter.close();
}catch (IOException e){
e.printStackTrace();
}
}
}
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best regards & a nice day
Zhao Ximing
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