一个例子学懂lucene--Helloworld

lucene的一个Helloworld例子，麻雀虽小，五脏俱全。

所需jar包：lucene-analyzers-3.6.2.jar、lucene-core-3.6.2.jar、junit-4.4.jar

import java.io.IOException;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.standard.StandardAnalyzer;
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.IndexWriter.MaxFieldLength;
import org.apache.lucene.queryParser.MultiFieldQueryParser;
import org.apache.lucene.queryParser.ParseException;
import org.apache.lucene.queryParser.QueryParser;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.TopDocs;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.LockObtainFailedException;
import org.apache.lucene.store.RAMDirectory;
import org.apache.lucene.util.Version;
import org.junit.Test;

public class HelloWorld {
	@SuppressWarnings("deprecation")
	@Test
	public  void luceneTest(){
		Directory directory  = new RAMDirectory();
		Analyzer analyzer = new StandardAnalyzer(Version.LUCENE_36);
		try {
				 IndexWriter indexWriter = new IndexWriter(directory, analyzer, true, MaxFieldLength.LIMITED);
				 Document document = new Document();
				 Document document2 = new Document();
				 String text  = "我是中国人，我爱中国.";
				 String text2  = "我是中国人，我爱中国.";
				 document.add(new Field("fieldname", text, Field.Store.YES, Field.Index.ANALYZED));
				 document2.add(new Field("fieldname", text2, Field.Store.YES, Field.Index.ANALYZED));
				 indexWriter.addDocument(document);
				 indexWriter.addDocument(document2);
				 indexWriter.optimize();
				 indexWriter.close();
				 // Now search the index;
				 IndexSearcher isearcher = new IndexSearcher(directory);
				 // Parse a simple query that searches for "中国人"
				  String [] queryFileds = {"fieldname"};   
				 QueryParser parser = new MultiFieldQueryParser(Version.LUCENE_36, queryFileds, analyzer);
				 Query query = parser.parse("中国人");
				 TopDocs result =  isearcher.search(query, 1000);
				 System.out.println("检索到"+result.totalHits+"条符合条件的数据.");
				 isearcher.close();
				 directory.close();
		} catch (CorruptIndexException e) {
			e.printStackTrace();
		} catch (LockObtainFailedException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} catch (ParseException e) {
			e.printStackTrace();
		}
	}
}