全文检索lucene学习笔记(三)

package com.lucene;

import java.io.IOException;

import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.queryParser.ParseException;
import org.apache.lucene.queryParser.QueryParser;
import org.apache.lucene.search.Explanation;
import org.apache.lucene.search.Hits;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.Query;
import org.apache.lucene.store.FSDirectory;

public class Explainer {

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

String indexDir = "C://test//index";
String queryExp = "ERROR";

FSDirectory directory = FSDirectory.getDirectory(indexDir);
QueryParser parser = new QueryParser("contents", new StandardAnalyzer());
Query query = parser.parse(queryExp);

System.out.println("Query: " + queryExp);

IndexSearcher searcher = new IndexSearcher(directory);
Hits hits = searcher.search(query);

for (int i = 0; i < hits.length(); i++) {
Explanation explanation = searcher.explain(query, hits.id(i));
System.out.println("--------------------");
Document doc = hits.doc(i);
System.out.println(doc.get("filename"));
System.out.println(explanation.toString());
}
}
}