使用Java的Lucene搜索工具对检索结果进行分组和分页

 public class IndexHelper { private Document document; private Directory directory; private IndexWriter indexWriter; public Directory getDirectory(){ directory=(directory==null)? new RAMDirectory():directory; return directory; } private IndexWriterConfig getConfig() { return new IndexWriterConfig(Version.LUCENE_43, new IKAnalyzer(true)); } private IndexWriter getIndexWriter() { try { return new IndexWriter(getDirectory(), getConfig()); } catch (IOException e) { e.printStackTrace(); return null; } } public IndexSearcher getIndexSearcher() throws IOException { return new IndexSearcher(DirectoryReader.open(getDirectory())); } /** * Create index for group test * @param author * @param content */ public void createIndexForGroup(int id,String author,String content) { indexWriter = getIndexWriter(); document = new Document(); document.add(new IntField("id",id, Field.Store.YES)); document.add(new StringField("author", author, Field.Store.YES)); document.add(new TextField("content", content, Field.Store.YES)); try { indexWriter.addDocument(document); indexWriter.commit(); indexWriter.close(); } catch (IOException e) { e.printStackTrace(); } } } 

 public class GroupTest public void group(IndexSearcher indexSearcher,String groupField,String content) throws IOException, ParseException { GroupingSearch groupingSearch = new GroupingSearch(groupField); groupingSearch.setGroupSort(new Sort(SortField.FIELD_SCORE)); groupingSearch.setFillSortFields(true); groupingSearch.setCachingInMB(4.0, true); groupingSearch.setAllGroups(true); //groupingSearch.setAllGroupHeads(true); groupingSearch.setGroupDocsLimit(10); QueryParser parser = new QueryParser(Version.LUCENE_43, "content", new IKAnalyzer(true)); Query query = parser.parse(content); TopGroups result = groupingSearch.search(indexSearcher, query, 0, 1000); System.out.println("搜索命中数：" + result.totalHitCount); System.out.println("搜索结果分组数：" + result.groups.length); Document document; for (GroupDocs groupDocs : result.groups) { System.out.println("分组：" + groupDocs.groupValue.utf8ToString()); System.out.println("组内记录：" + groupDocs.totalHits); //System.out.println("groupDocs.scoreDocs.length:" + groupDocs.scoreDocs.length); for (ScoreDoc scoreDoc : groupDocs.scoreDocs) { System.out.println(indexSearcher.doc(scoreDoc.doc)); } } } 

 public static void main(String[] args) throws IOException, ParseException { IndexHelper indexHelper = new IndexHelper(); indexHelper.createIndexForGroup(1,"红薯", "开源中国"); indexHelper.createIndexForGroup(2,"红薯", "开源社区"); indexHelper.createIndexForGroup(3,"红薯", "代码设计"); indexHelper.createIndexForGroup(4,"红薯", "设计"); indexHelper.createIndexForGroup(5,"觉先", "Lucene开发"); indexHelper.createIndexForGroup(6,"觉先", "Lucene实战"); indexHelper.createIndexForGroup(7,"觉先", "开源Lucene"); indexHelper.createIndexForGroup(8,"觉先", "开源solr"); indexHelper.createIndexForGroup(9,"散仙", "散仙开源Lucene"); indexHelper.createIndexForGroup(10,"散仙", "散仙开源solr"); indexHelper.createIndexForGroup(11,"散仙", "开源"); GroupTest groupTest = new GroupTest(); groupTest.group(indexHelper.getIndexSearcher(),"author", "开源"); } } 

 ScoreDoc[] sd = XXX; // 查询起始记录位置 int begin = pageSize * (currentPage - 1); // 查询终止记录位置 int end = Math.min(begin + pageSize, sd.length); for (int i = begin; i 
2、使用searchAfter(...)
Lucene提供了五个重载方法，可以根据需要使用
ScoreDoc after：为上次搜索结果ScoreDoc总量减1；
Query query：查询方式
int n：为每次查询返回的结果数，即每页的结果总量
一个简单的使用示例：
 //可以使[email protected]~码网用Map保存必要的搜索结果 Map resultMap = new HashMap(); ScoreDoc after = null; Query query = XX TopDocs td = search.searchAfter(after, query, size); //获取命中数 resultMap.put("num", td.totalHits); ScoreDoc[] sd = td.scoreDocs; for (ScoreDoc scoreDoc : sd) { //经典的搜索结果处理 } //搜索结果ScoreDoc总量减1 after = sd[td.scoreDocs.length - 1]; //保存after用于下次搜索，即下一页开始 resultMap.put("after", after); return resultMap;