Lucene（3.5）解析查询表达式：QueryParser

package com.test.lucene;import java.io.File;import org.apache.lucene.analysis.Analyzer;import org.apache.lucene.analysis.standard.StandardAnalyzer;import org.apache.lucene.document.Document;import org.apache.lucene.index.IndexReader;import org.apache.lucene.queryParser.QueryParser;import org.apache.lucene.search.IndexSearcher;import org.apache.lucene.search.Query;import org.apache.lucene.search.ScoreDoc;import org.apache.lucene.search.TopDocs;import org.apache.lucene.store.Directory;import org.apache.lucene.store.FSDirectory;import org.apache.lucene.util.Version;import org.junit.Test;public class ParserTest {//共找到1条记录//name: java//date:1334494024083//size: 148//content: 全国软件专业人才设计与开发大赛//帽子和服装//Hello//Lucene实战(第二版) Lucene in action//人民邮电出版社//the quick brown fox jumped over the lazy dogprivate static final Version version = Version.LUCENE_35;private static final Analyzer analyzer = new StandardAnalyzer(version);//和索引时用的分词器一致@Testpublic void testQueryPraser() throws Exception {//QueryParser parser = new QueryParser(version, "content", analyzer);//默认在content域中查找QueryParser parser = new MyQueryParser(version, "content", analyzer);//默认在content域中查找, 重写了getRangeQuery方法， 可以进行数字范围查询Query query = null; //查找content（默认域）中存在软件的结果query = parser.parse("软件");//查找name域中有java的结果query = parser.parse("name:java");//使用通配符query = parser.parse("name: j*");//默认*号不能出现在最前端， 会影响效率, 使用parser.setAllowLeadingWildcard(true)打开query = parser.parse("lu*n?");//只能在单个分词中使用通配符， 即 使用 “lucene*action”就匹配不到query = parser.parse("lucene test");//默认lucene和action是或关系query = parser.parse("lucene OR test");//同上, OR必须大写query = parser.parse("lucene AND test");//与关系query = parser.parse("- lucene + test");//存在test但不存在lucene//query = parser.parse("size:[100 TO 200]");//这个query是TermRangeQuery所以不能用于数字（日期）范围查询query = parser.parse("name:[java TO java]");//查找有a-z字母的    {}不包含//数字范围查询需要重写QueryParser的getRangeQuery方法query = parser.parse("date:[1334550379955 TO 1334550379955]");query = parser.parse("\"lucene action\"~1");//1即phraseQuery中的slop=1query = parser.parse("name:xava~0.74");//加上~代表模糊查询， 要和上面的额短语查询相区别开来，另外~后面可以加一个浮点数去顶相似度//查询大小在145到150， 名称与javv相似， 创建时间在1334550379955之前的 不要， lucene与action相距1query = parser.parse("size:[145 TO 150] + name:javv~ - date:[1 TO 1334550379954] + \"lucene action\"~1");doSearch(query);}private void doSearch(Query query) throws Exception{Directory dir = FSDirectory.open(new File("E:/lucene/index"));IndexReader reader = IndexReader.open(dir); IndexSearcher searcher = new IndexSearcher(reader);TopDocs hits = searcher.search(query, 100);System.out.println("共找到" + hits.totalHits + "条记录");ScoreDoc[] docs = hits.scoreDocs;for(int i = 0; i < docs.length; i++){int docId = docs[i].doc;Document doc = searcher.doc(docId);System.out.println("name: " + doc.get("name"));System.out.println("date:" + doc.get("date"));System.out.println("size: " + doc.get("size"));System.out.println("content: " + doc.get("content"));}searcher.close();}}

/** * 自定义QueryParser， 提供数字范围查询支持 * @author Ping_QC * */public class MyQueryParser extends QueryParser {public MyQueryParser(Version matchVersion, String f, Analyzer a) {super(matchVersion, f, a);}@Overrideprotected org.apache.lucene.search.Query getRangeQuery(String field,String part1, String part2, boolean inclusive)throws ParseException {if ("size".equals(field) || "date".equals(field)) {return NumericRangeQuery.newLongRange(field, Long.parseLong(part1),Long.parseLong(part2), inclusive, inclusive);}return super.newRangeQuery(field, part1, part2, inclusive);}}