public class OperatorIndex {  public static final String INDEX_PATH = "D:/indexDir";      // 创建分词器  private Analyzer analyzer = null;  // 索引保存目录  private File indexFile = null;  // 目录对象  private Directory directory = null;  // 创建indexWriterConfig 只能实例化一次用一次  private IndexWriterConfig indexWriterConfig = null;  SimpleDateFormat simpleDateFormat;      private IndexSearcher indexSearcher;      public void init() throws IOException {  analyzer = new IKAnalyzer();  indexFile = new File(INDEX_PATH);  directory = FSDirectory.open(indexFile);  simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");  System.out.println("##初始化完成##");      }      // 数据库中需要建立索引的比表封装成Document对象      public Document createDocument(Article article) {  Document document = new Document();  document.add(new TextField("id", article.getId() + "", Field.Store.YES));  document.add(new TextField("title", article.getTitle(), Field.Store.YES));  document.add(new TextField("content", article.getContent(),  Field.Store.YES));  return document;  }      // 获得日期  public String getDate() {  return simpleDateFormat.format(new Date());      }      // 查询所有索引  public void openIndexFile() throws IOException {  System.out.println("读取索引开始...");  IndexReader indexReader = IndexReader.open(directory);  // 获取索引个数  int maxDoc = indexReader.maxDoc();  System.out.println("maxDoc:" + maxDoc);  Article article = null;  for (int i = 0; i < maxDoc; i++) {  Document document = indexReader.document(i);  article = new Article();  if (document.get("id") == null) {  System.out.println("id 为空");      }      article.setId(Integer.parseInt(document.get("id")));  article.setTitle(document.get("title"));  article.setContent(document.get("content"));  System.out.println(article);      }  indexReader.close();  System.out.println("读取索引结束");      }      // 创建索引  public void createIndex(Article article) throws IOException {  indexWriterConfig = new IndexWriterConfig(Version.LATEST, analyzer);  IndexWriter indexWriter = new IndexWriter(directory, indexWriterConfig);  // 创建索引前删除以前的索引  // indexWriter.deleteAll();  Document createDocument = createDocument(article);  indexWriter.addDocument(createDocument);  // indexWriter.commit();  indexWriter.close();      System.out.println("[" + getDate() + "]" + "lucene写入索引到" + "["  + indexFile.getAbsolutePath() + "]" + "成功");  }      // 批量创建索引  public void createIndexes(List<Article> articles) throws IOException {  // indexWriterConfig = new IndexWriterConfig(Version.LATEST, analyzer);  // IndexWriter indexWriter = new IndexWriter(directory,  // indexWriterConfig);  // indexWriter.deleteAll();      for (Article article : articles) {  createIndex(article);      }      }      // 删除索引  public void deleteIndex(int id) throws IOException {  if (indexFile.exists()) {  IndexWriterConfig indexWriterConfig = new IndexWriterConfig(  Version.LATEST, analyzer);  IndexWriter indexWriter = new IndexWriter(directory,  indexWriterConfig);  indexWriter.deleteDocuments(new Term("id", String.valueOf(id)));  System.out.println("[" + getDate() + "]" + "lucene删除索引成功");  indexWriter.close();      } else {  System.out.println("删除索引失败");  }      }      // 批量删除索引  public void deleteIndexes(List<Article> articles) {  if (articles == null || articles.size() == 0) {  return;      }  for (Article article : articles) {  try {  deleteIndex(article.getId());  } catch (IOException e) {  // TODO Auto-generated catch block  System.out.println("删除索引失败");  e.printStackTrace();  }      }      }      // 更新索引 先删除索引在添加索引  public void updateIndex(Article article) throws IOException {  deleteIndex(article.getId());  createIndex(article);      }    //查询索引  public void searchIndex(String keyword) {  IndexReader indexReader = null;  try {  indexReader = IndexReader.open(directory);  IndexSearcher indexSearcher = new IndexSearcher(indexReader);      QueryParser queryParser = new QueryParser(Version.LATEST, "title",  new IKAnalyzer(false));  Query query = queryParser.parse(keyword.trim());      TopDocs topDocs = indexSearcher.search(query, 100);  ScoreDoc[] scoreDocs = topDocs.scoreDocs;  if (scoreDocs == null || scoreDocs.length == 0) {  System.out.println("很遗憾！没有找到！");      }  for (ScoreDoc scoreDoc : scoreDocs) {  Document document = indexSearcher.doc(scoreDoc.doc);  System.out.println(document.toString());  System.out.println("[title:" + document.get("title")  + ",content:" + document.get("content") + "]");      }  } catch (IOException e) {  // TODO Auto-generated catch block  e.printStackTrace();  } catch (ParseException e) {  // TODO Auto-generated catch block  e.printStackTrace();  } finally {  if (indexReader != null) {  try {  indexReader.close();  } catch (IOException e) {  // TODO Auto-generated catch block  e.printStackTrace();  }      }  }      }    //分页查询  public void paginationQuery(String keyword, int pageSize, int currentPage) {  String[] fields = { "title", "content" };  IndexReader indexReader = null;  try {  MultiFieldQueryParser multiFieldQueryParser = new MultiFieldQueryParser(  Version.LATEST, fields, new IKAnalyzer(false));  Query query = multiFieldQueryParser.parse(keyword.trim());      indexReader = IndexReader.open(directory);  IndexSearcher indexSearcher = new IndexSearcher(indexReader);      // 搜索返回的结果并取前100的结果  TopDocs topDocs = indexSearcher.search(query, 100);  TopDocs allDocs = indexSearcher  .search(new MatchAllDocsQuery(), 100);  int totalHits = topDocs.totalHits;  System.out.println("总数：" + totalHits);  // 搜索返回的结果集合  ScoreDoc[] scoreDocs = topDocs.scoreDocs;      int begin = (currentPage - 1) * pageSize;  int end = Math.min(begin + pageSize, scoreDocs.length);      for (int i = begin; i < end; i++) {  Document document = indexSearcher.doc(scoreDocs[i].doc);  System.out.println("[title：" + document.get("title") + "]");      }  } catch (ParseException e) {  // TODO Auto-generated catch block  e.printStackTrace();  } catch (IOException e) {  // TODO Auto-generated catch block  e.printStackTrace();  } finally {  if (indexReader != null) {  try {  indexReader.close();  } catch (IOException e) {  // TODO Auto-generated catch block  e.printStackTrace();  }      }  }      }    //查询高亮显示  public void highlighterSearch() {  IndexReader indexReader = null;  try {  indexReader = IndexReader.open(directory);      IndexSearcher indexSearcher = new IndexSearcher(indexReader);      Term term = new Term("content", "中国");      TermQuery termQuery = new TermQuery(term);      TopDocs topDocs = indexSearcher  .search(termQuery, Integer.MAX_VALUE);  System.out.println("查询结果数：" + topDocs.totalHits);  System.out.println("最大的评分" + topDocs.getMaxScore());      ScoreDoc[] scoreDocs = topDocs.scoreDocs;  for (ScoreDoc scoreDoc : scoreDocs) {  Document document = indexSearcher.doc(scoreDoc.doc);  System.out.println("检索条件:" + term.toString());  String content = document.get("content");      System.out.println("content:" + document.get("content"));      // 高亮展示  SimpleHTMLFormatter simpleHTMLFormatter = new SimpleHTMLFormatter(  "【", "】");      Highlighter highlighter = new Highlighter(simpleHTMLFormatter,  new QueryScorer(termQuery));  highlighter.setTextFragmenter(new SimpleFragmenter(content  .length()));      if (!"".equals(content)) {  TokenStream tokenStream = new IKAnalyzer().tokenStream(  content, new StringReader(content));  String bestFragment = highlighter.getBestFragment(  tokenStream, content);  System.out.println("高亮显示：" + "检索结果如下所示:");  System.out.println(bestFragment);  // 结束关键字高亮  System.out.println("文件内容:" + content);  // 匹配相关度  System.out.println(scoreDoc.score);      }      }  } catch (IOException e) {  // TODO Auto-generated catch block  e.printStackTrace();  } catch (InvalidTokenOffsetsException e) {  // TODO Auto-generated catch block  e.printStackTrace();  } finally {  if (indexReader != null) {  try {  indexReader.close();  } catch (IOException e) {  // TODO Auto-generated catch block  e.printStackTrace();  }      }  }      }      // 释放资源  public void destory() throws IOException {  analyzer.close();  directory.close();  System.out.println("销毁成功");  }      public static void main(String[] args) throws IOException {  OperatorIndex index = new OperatorIndex();  index.init();  // Article article = new Article();  // article.setId(1);  // article.setTitle("hello");  // article.setContent("hello world!");  //  // index.createIndex(article);  // index.openIndexFile();      // index.deleteIndex(1);  // index.openIndexFile();  // article.setContent("hello");  // index.updateIndex(article);  // index.openIndexFile();      List<Article> articles = new ArrayList<Article>();  Article article = new Article(1, "中国", "11111gdfjs中国");  Article article1 = new Article(2, "我爱你中国", "11111gdfjs我爱你中国");  Article article2 = new Article(3, "国中之国", "fdsab;1gdfjs国中之国");  Article article3 = new Article(4, "44", "111gdsa11gdfjs中国将成为世界上最强大的国家");  Article article4 = new Article(5, "55", "111gdas11gdfjs");      articles.add(article);  articles.add(article1);  articles.add(article2);  articles.add(article3);  articles.add(article4);      index.deleteIndexes(articles);  index.createIndexes(articles);  index.openIndexFile();  index.searchIndex("中国");  index.paginationQuery("中国", 1, 1);  index.highlighterSearch();      // index.destory();      }  }        Article.java实体    public class Article {  private int id;  private String title;  private String content;      public int getId() {  return id;  }      public void setId(int id) {  this.id = id;  }      public String getTitle() {  return title;  }      public void setTitle(String title) {  this.title = title;  }      public String getContent() {  return content;  }      public void setContent(String content) {  this.content = content;  }      public Article(int id, String title, String content) {  super();  this.id = id;  this.title = title;  this.content = content;  }      public Article() {  // TODO Auto-generated constructor stub  }      @Override  public String toString() {  // TODO Auto-generated method stub  return "article[id:" + id + ",title:" + title + ",content:" + content  + "]";  }      }