lucene facet查询示例

package com.lucene.search; import java.io.File; import java.io.IOException; import java.nio.file.Paths; import java.util.Set; import java.util.concurrent.ExecutorService; import org.apache.lucene.analysis.Analyzer; import org.apache.lucene.analysis.standard.StandardAnalyzer; import org.apache.lucene.document.Document; import org.apache.lucene.index.DirectoryReader; import org.apache.lucene.index.IndexReader; import org.apache.lucene.index.MultiReader; import org.apache.lucene.index.Term; import org.apache.lucene.queryparser.classic.ParseException; import org.apache.lucene.queryparser.classic.QueryParser; import org.apache.lucene.search.BooleanQuery; import org.apache.lucene.search.CachingWrapperFilter; import org.apache.lucene.search.Collector; import org.apache.lucene.search.Filter; import org.apache.lucene.search.IndexSearcher; import org.apache.lucene.search.MatchAllDocsQuery; import org.apache.lucene.search.NumericRangeQuery; import org.apache.lucene.search.Query; import org.apache.lucene.search.ScoreDoc; import org.apache.lucene.search.TermQuery; import org.apache.lucene.search.TopDocs; import org.apache.lucene.search.BooleanClause.Occur; import org.apache.lucene.store.FSDirectory; import org.apache.lucene.util.BytesRef; /**lucene索引查询工具类 * @author lenovo * */ public class SearchUtil { /**获取IndexSearcher对象 * @param indexPath * @param service * @return * @throws IOException */ public static IndexSearcher getIndexSearcherByParentPath(String parentPath,ExecutorService service) throws IOException{ MultiReader reader = null; //设置 try { File[] files = new File(parentPath).listFiles(); IndexReader[] readers = new IndexReader[files.length]; for (int i = 0 ; i < files.length ; i ++) { readers[i] = DirectoryReader.open(FSDirectory.open(Paths.get(files[i].getPath(), new String[0]))); } reader = new MultiReader(readers); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } return new IndexSearcher(reader,service); } /**多目录多线程查询 * @param parentPath 父级索引目录 * @param service 多线程查询 * @return * @throws IOException */ public static IndexSearcher getMultiSearcher(String parentPath,ExecutorService service) throws IOException{ File file = new File(parentPath); File[] files = file.listFiles(); IndexReader[] readers = new IndexReader[files.length]; for (int i = 0 ; i < files.length ; i ++) { readers[i] = DirectoryReader.open(FSDirectory.open(Paths.get(files[i].getPath(), new String[0]))); } MultiReader multiReader = new MultiReader(readers); IndexSearcher searcher = new IndexSearcher(multiReader,service); return searcher; } /**根据索引路径获取IndexReader * @param indexPath * @return * @throws IOException */ public static DirectoryReader getIndexReader(String indexPath) throws IOException{ return DirectoryReader.open(FSDirectory.open(Paths.get(indexPath, new String[0]))); } /**根据索引路径获取IndexSearcher * @param indexPath * @param service * @return * @throws IOException */ public static IndexSearcher getIndexSearcherByIndexPath(String indexPath,ExecutorService service) throws IOException{ IndexReader reader = getIndexReader(indexPath); return new IndexSearcher(reader,service); } /**如果索引目录会有变更用此方法获取新的IndexSearcher这种方式会占用较少的资源 * @param oldSearcher * @param service * @return * @throws IOException */ public static IndexSearcher getIndexSearcherOpenIfChanged(IndexSearcher oldSearcher,ExecutorService service) throws IOException{ DirectoryReader reader = (DirectoryReader) oldSearcher.getIndexReader(); DirectoryReader newReader = DirectoryReader.openIfChanged(reader); return new IndexSearcher(newReader, service); } /**多条件查询类似于sql in * @param querys * @return */ public static Query getMultiQueryLikeSqlIn(Query ... querys){ BooleanQuery query = new BooleanQuery(); for (Query subQuery : querys) { query.add(subQuery,Occur.SHOULD); } return query; } /**多条件查询类似于sql and * @param querys * @return */ public static Query getMultiQueryLikeSqlAnd(Query ... querys){ BooleanQuery query = new BooleanQuery(); for (Query subQuery : querys) { query.add(subQuery,Occur.MUST); } return query; } /**从指定配置项中查询 * @return * @param analyzer 分词器 * @param field 字段 * @param fieldType 字段类型 * @param queryStr 查询条件 * @param range 是否区间查询 * @return */ public static Query getQuery(String field,String fieldType,String queryStr,boolean range){ Query q = null; try { if(queryStr != null && !"".equals(queryStr)){ if(range){ String[] strs = queryStr.split("\\|"); if("int".equals(fieldType)){ int min = new Integer(strs[0]); int max = new Integer(strs[1]); q = NumericRangeQuery.newIntRange(field, min, max, true, true); }else if("double".equals(fieldType)){ Double min = new Double(strs[0]); Double max = new Double(strs[1]); q = NumericRangeQuery.newDoubleRange(field, min, max, true, true); }else if("float".equals(fieldType)){ Float min = new Float(strs[0]); Float max = new Float(strs[1]); q = NumericRangeQuery.newFloatRange(field, min, max, true, true); }else if("long".equals(fieldType)){ Long min = new Long(strs[0]); Long max = new Long(strs[1]); q = NumericRangeQuery.newLongRange(field, min, max, true, true); } }else{ if("int".equals(fieldType)){ q = NumericRangeQuery.newIntRange(field, new Integer(queryStr), new Integer(queryStr), true, true); }else if("double".equals(fieldType)){ q = NumericRangeQuery.newDoubleRange(field, new Double(queryStr), new Double(queryStr), true, true); }else if("float".equals(fieldType)){ q = NumericRangeQuery.newFloatRange(field, new Float(queryStr), new Float(queryStr), true, true); }else{ Analyzer analyzer = new StandardAnalyzer(); q = new QueryParser(field, analyzer).parse(queryStr); } } }else{ q= new MatchAllDocsQuery(); } System.out.println(q); } catch (ParseException e) { // TODO Auto-generated catch block e.printStackTrace(); } return q; } /**根据field和值获取对应的内容 * @param fieldName * @param fieldValue * @return */ public static Query getQuery(String fieldName,Object fieldValue){ Term term = new Term(fieldName, new BytesRef(fieldValue.toString())); return new TermQuery(term); } /**根据IndexSearcher和docID获取默认的document * @param searcher * @param docID * @return * @throws IOException */ public static Document getDefaultFullDocument(IndexSearcher searcher,int docID) throws IOException{ return searcher.doc(docID); } /**根据IndexSearcher和docID * @param searcher * @param docID * @param listField * @return * @throws IOException */ public static Document getDocumentByListField(IndexSearcher searcher,int docID,Set<String> listField) throws IOException{ return searcher.doc(docID, listField); } /**分页查询 * @param page 当前页数 * @param perPage 每页显示条数 * @param searcher searcher查询器 * @param query 查询条件 * @return * @throws IOException */ public static TopDocs getScoreDocsByPerPage(int page,int perPage,IndexSearcher searcher,Query query) throws IOException{ TopDocs result = null; if(query == null){ System.out.println(" Query is null return null "); return null; } ScoreDoc before = null; if(page != 1){ TopDocs docsBefore = searcher.search(query, (page-1)*perPage);