lucene删除索引 恢复索引

删除索引

for (String id : sourceItemId) {
   Term term = new Term("id" , id);
   try {
    reader.deleteDocuments(term);
   } catch (Exception e) {
    e.printStackTrace();
   }
  }

 

恢复索引

 

IndexWriter.unlock(reader.directory());

reader.undeleteAll();

 

 

得到索引总数

reader.numDocs();