public class Indexer {

private  IndexWriter indexWriter;

/**

 * 构造器实例化indexWriter

 * @throws Exception

 */

public Indexer(String indexPath) throws Exception {

Directory directory = FSDirectory.open(Paths.get(indexPath));//索引存储的位置

Analyzer analyzer = new StandardAnalyzer();//标准分析器

IndexWriterConfig iwc = new IndexWriterConfig(analyzer);

indexWriter = new IndexWriter(directory, iwc);

}

/**

 * 关闭indexWriter

 * @param indexWriter

 * @throws IOException

 */

public void close() throws Exception {

indexWriter.close();

}

/**

 * 获取文档Document

 * @throws FileNotFoundException

 */

public Document getDocumnet(File f) throws Exception {

Document doc = new Document();

doc.add(new TextField("content", new FileReader(f)));

doc.add(new TextField("tittle",f.getName(),Field.Store.YES));

doc.add(new TextField("path",f.getCanonicalPath(), Field.Store.YES));

return doc;

}

/**

 * 索引当个文件

 * @throws Exception

 */

public void indexFile(File f) throws Exception {

System.out.println(f.getName());

Document doc = this.getDocumnet(f);

indexWriter.addDocument(doc);

}

/**

 * 索引一个目录下的所有文件

 * @param filePath 目录路径

 * @return 索引文件的个数

 * @throws Exception

 */

public int index(String filePath) throws Exception {

File[] files = new File(filePath).listFiles();

for(File f:files) {

this.indexFile(f);

}

return indexWriter.numDocs();

}

public static void main(String[] args) {

        String indexPath = "G:\\工作\\luence\\index";

        String dataPath = "G:\\工作\\luence\\data";

        Indexer indexer = null;

        int indexNum=0;

        try {

            indexer = new Indexer(indexPath);

            indexNum = indexer.index(dataPath);

        } catch (Exception e) {

            e.printStackTrace();

        }finally {

            try {

                indexer.close();

            } catch (Exception e) {

                e.printStackTrace();

            }

        }

        System.out.println("索引了"+indexNum+"个文件");

    }

}

public class Searcher {

public static void search(String indexPath,String searchStr) throws Exception {

Directory dir = FSDirectory.open(Paths.get(indexPath));

IndexReader indeReader = DirectoryReader.open(dir);

IndexSearcher indexSearch = new IndexSearcher(indeReader);

Analyzer analyzer = new StandardAnalyzer();//标准分词器

QueryParser parser = new QueryParser("content", analyzer);

Query query = parser.parse(searchStr);

TopDocs td = indexSearch.search(query, 10);

for(ScoreDoc sc:td.scoreDocs) {

Document doc = indexSearch.doc(sc.doc);

System.out.println(doc.get("tittle"));

System.out.println(doc.get("path"));

}

}

public static void main(String[] args) throws Exception {

Searcher.search("G:\\工作\\luence\\index\\", "Hollywood");

}

}