Lucene2.4之PhraseQuery的用法

代码如下：
package demo;

import java.io.IOException;

import org.apache.lucene.analysis.WhitespaceAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.index.CorruptIndexException;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.Term;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.PhraseQuery;
import org.apache.lucene.search.ScoreDoc;
import org.apache.lucene.search.TopDocs;
import org.apache.lucene.store.LockObtainFailedException;
import org.apache.lucene.store.RAMDirectory;

public class TestLucene {

public static void main(String[] args) throws CorruptIndexException, LockObtainFailedException, IOException {

String content = "the quick brown fox jumped over the lazy dog";

RAMDirectory directory = new RAMDirectory();
IndexWriter writer = new IndexWriter(directory, new WhitespaceAnalyzer(), true, new IndexWriter.MaxFieldLength(1000));
Document doc = new Document();
doc.add(new Field("field", content, Field.Store.YES, Field.Index.ANALYZED));
writer.addDocument(doc);
writer.close();

IndexSearcher searcher = new IndexSearcher(directory);
PhraseQuery query = new PhraseQuery();
query.setSlop(3);
String[] phrase = new String[]{"fox", "quick"};
for (int i = 0; i < phrase.length; i++) {
query.add(new Term("field", phrase[i]));
}
TopDocs topDocs = searcher.search(query, 100);
ScoreDoc[] hits = topDocs.scoreDocs;
System.out.println("共有" + searcher.maxDoc() + "条索引，命中" + hits.length + "条");
for (int i = 0; i < hits.length; i++) {
int DocId = hits[i].doc;
Document document = searcher.doc(DocId);
System.out.println(DocId + ":" + document.get("field"));
}
searcher.close();
}
}
运行结果：

共有1条索引，命中1条
0:the quick brown fox jumped over the lazy dog