lucene 入门一

牛到小试一下 lucene 入门记录
set1 : 当然是引入lucene jar包了， 在这个ant, maven大行其道的时代，毫不犹豫的选择了maven。

<dependency>
      <groupId>org.apache.lucene</groupId>
      <artifactId>lucene-core</artifactId>
      <version>3.6.0</version>
</dependency>

set2：建立索引

定义一个简单的接口: public CargoIndexActionResult create();

实现:

IndexWriter writer = getWriter();
writer.setInfoStream(System.out);
Document doc = null;
for (CargoDO cargo : cargoes) {
doc = new Document();
IndexConvertor.convert(doc, cargo);
writer.addDocument(doc);
}
writer.close();
directory.close();

set3：搜索
         @Override
@SuppressWarnings("deprecation")
public SearchCargoPageListResult search(CarogoSearchOrder order) {

SearchCargoPageListResult result = new SearchCargoPageListResult(order.getCurrentPage(),
order.getPageSize());
Directory directory;
try {
directory = getDirectory();

IndexSearcher searcher = new IndexSearcher(directory); //B

QueryParser parser = new QueryParser(Version.LUCENE_36, "name", new SimpleAnalyzer());
Query query = parser.parse(order.getName());
TopScoreDocCollector topCollector = TopScoreDocCollector.create(100, false);
searcher.search(query, topCollector);
ScoreDoc[] docs = topCollector.topDocs((order.getCurrentPage() - 1)
* order.getPageSize()).scoreDocs;
if (null == docs) {
result.setResultCode(SearchResultEnum.HAVE_NOT_DATA_EXCEPTION);
} else {
result.setTotalItems(topCollector.getTotalHits());
List<CargoInfo> cargos = new ArrayList<CargoInfo>();
Document doc = null;
CargoInfo info = null;
for (ScoreDoc scoreDoc : docs) {
int sn = scoreDoc.doc;
doc = searcher.doc(sn);
info = new CargoInfo();
SearchConvertor.convert(info, doc);
cargos.add(info);
}
searcher.close();
directory.close();
setSuccessResult(result);
}

} catch (ParseException e) {
logger.error("", e);
} catch (IOException e) {
logger.error("", e);
}

return result;
}