问题：为什么调用了删除部分文档后，全部文档都找不到了？项目已上传索引文件：/Users/mac/Lucene/data/data_04.txt/Users/mac/Lucene/data/data_05.txt/Users/mac/Lucene/data/data_02.txt/Users/mac/Lucene/data/data_03.txt/Users/mac/Lucene/data/data_01.txt索引文档结构：private Document getDocument(File file) throws IOException { Document document = new Document(); // index file contents Field contentField = new Field(Constants.CONTENTS, new FileReader(file)); // index file name Field fileNameField = new Field(Constants.FILE_NAME, file.getName(), Field.Store.YES, Field.Index.NOT_ANALYZED); // index file path Field filePathField = new Field(Constants.FILE_PATH, file.getCanonicalPath(), Field.Store.YES, Field.Index.NOT_ANALYZED); // index file length Field fileLengthField = new Field(Constants.FILE_LENGTH, file.length() + "", Field.Store.YES, Field.Index.NOT_ANALYZED); document.add(contentField); document.add(fileNameField); document.add(filePathField); document.add(fileLengthField); return document;}创建文档方法：private void indexFile(File file) throws IOException { log.info("Indexing -> " + file.getCanonicalPath()); Document document = getDocument(file); writer.addDocument(document);}查询文档方法：public TopDocs searchUsingPrefixQuery(String searchQuery) throws IOException { Term term = new Term(Constants.FILE_NAME, searchQuery); Query query = new PrefixQuery(term); return indexSearcher.search(query, Constants.MAX_SEARCH);}删除文档方法：private void deleteFile(String name) throws IOException { writer.deleteDocuments(new PrefixQuery(new Term(Constants.FILE_NAME, name))); writer.commit();}测试入口及输出：public static void main(String[] args) { Test tester; try { tester = new Test(); tester.createIndex(); tester.search("data"); tester.deleteIndex("data_01.txt"); tester.search("data"); } catch (IOException e) { e.printStackTrace(); } catch (ParseException e) { e.printStackTrace(); }}20:08:12.624 [main] INFO com.neo.code.lucene.demo01.Test - [searching files]: 520:08:12.634 [main] INFO com.neo.code.lucene.demo01.Test - [searching files]: 0