lucene完全匹配

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lucene本身是模糊匹配，基于分词后建立倒排索引

建立索引

建立索引时使用KeywordAnalyzer，此分词器将源字段的所有内容当成一个token进行存储，查询时需要进行完全匹配才能有输出

            //Analyzer analyzer = new StandardAnalyzer();//Analyzer分词，交给Indexwriter建立索引            //IKAnalyzer analyzer = new IKAnalyzer();            KeywordAnalyzer analyzer = new KeywordAnalyzer();            IndexWriterConfig config = new IndexWriterConfig(analyzer);            IndexWriter indexWriter = new IndexWriter(dir, config);

搜索时用PhraseQuery，

{            //QueryParser parser = new QueryParser("key", analyzer);            //Query Query;            /*            Term term = new Term("entity", query);            System.out.println("term:" + term);            Query = parser.parse(query);            System.out.println(Query);            */            PhraseQuery.Builder builder = new PhraseQuery.Builder();            builder.add(new Term("key", query), 0);            PhraseQuery pq = builder.build();            Hits hit = searcher.search(pq);            TopDocs topDocs = searcher.search(pq, 50);            ScoreDoc[] hits = topDocs.scoreDocs;            System.out.println(topDocs.totalHits);            System.out.println(hits.length);            Random random = new Random();            ArrayList ans = new ArrayList();            if(hits.length == 0)                return null;            else {                for (int i = 0; i < hits.length; i++) {                    Document document = searcher.doc(hits[i].doc);                    ans.add(document.get("value"));                }            }}

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