lucene索引库优化二

public class MergePolicies {
public static void main(String[] args) throws Exception {
long start=new Date().getTime();
IOContext context=new IOContext();
Directory dir=FSDirectory.open(new File("E:/docData/indexDir"));
/**
* 把索引存储到内存中
*/
Directory directory=new RAMDirectory(dir,context);

IndexReader reader=DirectoryReader.open(directory);

IndexSearcher searcher=new IndexSearcher(reader);
/**
* 多条件查询
*/
String[] fields={"content"};
QueryParser parser=new MultiFieldQueryParser(Version.LUCENE_44, fields,new StandardAnalyzer(Version.LUCENE_44));
Query query = parser.parse("源码");
TopScoreDocCollector results=TopScoreDocCollector.create(10, false);
searcher.search(query, results);
ScoreDoc[] scoreDocs = results.topDocs().scoreDocs;

System.out.println(scoreDocs.length);
/**
* 可以在此分页
* start  起始位置
* length 记录数
*/
for(int i=0;i<scoreDocs.length;i++){
Document doc= searcher.doc(scoreDocs[i].doc);
System.out.println(doc.getField("filename")+"  "+scoreDocs[i].toString());
}
long end=new Date().getTime();
System.out.println("took time:"+(end-start));
}
}