Lucene 3.6.2入门系列:高级搜索之自定义QueryParser

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public class AdvancedSearch { private Directory directory; private IndexReader reader; public AdvancedSearch(){ /**文件大小*/ int[] sizes = {90, 10, 20, 10, 60, 50}; /**文件名*/ String[] names = {"Michael.java", "Scofield.ini", "Tbag.txt", "Jack", "Jade", "Jadyer"}; /**文件内容*/ String[] contents = {"my java blog is http://blog.csdn.net/jadyer", "my Java Website is http://www.jadyer.cn", "my name is jadyer", "I am a Java Developer", "I am from Haerbin", "I like java of Lucene"}; /**文件日期*/ Date[] dates = new Date[sizes.length]; SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd HH:mm:ss"); IndexWriter writer = null; Document doc = null; try { dates[0] = sdf.parse("20130407 15:25:30"); dates[1] = sdf.parse("20130407 16:30:45"); dates[2] = sdf.parse("20130213 11:15:25"); dates[3] = sdf.parse("20130808 09:30:55"); dates[4] = sdf.parse("20130526 13:54:22"); dates[5] = sdf.parse("20130701 17:35:34"); directory = FSDirectory.open(new File("myExample/01_index/")); writer = new IndexWriter(directory, new IndexWriterConfig(Version.LUCENE_36, new StandardAnalyzer(Version.LUCENE_36))); writer.deleteAll(); for(int i=0; i<sizes.length; i++){ doc = new Document(); doc.add(new NumericField("size",Field.Store.YES, true).setIntValue(sizes[i])); doc.add(new Field("name", names[i], Field.Store.YES, Field.Index.ANALYZED_NO_NORMS)); doc.add(new Field("content", contents[i], Field.Store.NO, Field.Index.ANALYZED)); doc.add(new NumericField("date", Field.Store.YES, true).setLongValue(dates[i].getTime())); writer.addDocument(doc); } } catch (Exception e) { e.printStackTrace(); } finally { if(null != writer){ try { writer.close(); } catch (IOException ce) { ce.printStackTrace(); } } } } /** * 获取IndexReader实例 */ private IndexReader getIndexReader(){ try { if(reader == null){ reader = IndexReader.open(directory); }else{ //if the index was changed since the provided reader was opened, open and return a new reader; else,return null //如果当前reader在打开期间index发生改变,则打开并返回一个新的IndexReader,否则返回null IndexReader ir = IndexReader.openIfChanged(reader); if(ir != null){ reader.close(); //关闭原reader reader = ir; //赋予新reader } } return reader; }catch(Exception e) { e.printStackTrace(); } return null; //发生异常则返回null } /** * 自定义QueryParser的搜索 * @param expr 搜索的表达式 */ public void searchByCustomQueryParser(String expr){ IndexSearcher searcher = new IndexSearcher(this.getIndexReader()); QueryParser parser = new MyQueryParser(Version.LUCENE_36, "content", new StandardAnalyzer(Version.LUCENE_36)); try { Query query = parser.parse(expr); TopDocs tds = searcher.search(query, 10); for(ScoreDoc sd : tds.scoreDocs){ Document doc = searcher.doc(sd.doc); System.out.print("文档编号=" + sd.doc + " 文档权值=" + doc.getBoost() + " 文档评分=" + sd.score + " "); System.out.println("size=" + doc.get("size") + " date=" + new SimpleDateFormat("yyyyMMdd HH:mm:ss").format(new Date(Long.parseLong(doc.get("date")))) + " name=" + doc.get("name")); } } catch (ParseException e) { System.err.println(e.getMessage()); } catch (Exception e) { e.printStackTrace(); } finally { if(null != searcher){ try { searcher.close(); //记得关闭IndexSearcher } catch (IOException e) { e.printStackTrace(); } } } } /** * 测试一下搜索效果 */ public static void main(String[] args) { AdvancedSearch advancedSearch = new AdvancedSearch(); advancedSearch.searchByCustomQueryParser("name:Jadk~"); advancedSearch.searchByCustomQueryParser("name:Ja??er"); System.out.println("------------------------------------------------------------------------"); advancedSearch.searchByCustomQueryParser("name:Jade"); System.out.println("------------------------------------------------------------------------"); advancedSearch.searchByCustomQueryParser("name:[h TO n]"); System.out.println("------------------------------------------------------------------------"); advancedSearch.searchByCustomQueryParser("size:[20 TO 80]"); System.out.println("------------------------------------------------------------------------"); advancedSearch.searchByCustomQueryParser("date:[20130407 TO 20130701]"); } }



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