用MultiSearcher在多索引中进行搜索

    /**
     * 多索引进行查询
     */
    public void testCreateIndex() {
        Analyzer analyzer = new IKAnalyzer();
        String atext ="明年起，杭州将对两区五县（市）居民发放市民卡，实现杭州市域范围医保“一卡通”凭卡就医。12月底，首批发卡工作将拉开帷幕";
        String btext ="搜索操作为每个Searchable分配一个线程市民卡，直到所有线程都完成其搜索。基本搜索和进行过滤的搜索是并行执行的";
        
        Directory a = new RAMDirectory();
        Directory b = new RAMDirectory();
        
        IndexWriter awriter;
        IndexWriter bwriter;
        
        IndexSearcher[] searchers;
        
        try {
            awriter = new IndexWriter(a, analyzer, true ,IndexWriter.MaxFieldLength.LIMITED);
            Document adoc = new Document();
            adoc.add(new Field("aid", "1", Field.Store.YES,Field.Index.ANALYZED));
            adoc.add(new Field("doc",  atext, Field.Store.YES,Field.Index.ANALYZED));
            adoc.add(new Field("name", "张三", Field.Store.YES,Field.Index.NOT_ANALYZED));
            awriter.addDocument(adoc);
            awriter.close();
            
            bwriter = new IndexWriter(b, analyzer, true ,IndexWriter.MaxFieldLength.LIMITED);
            Document bdoc = new Document();
            bdoc.add(new Field("bid", "1", Field.Store.YES,Field.Index.ANALYZED));
            bdoc.add(new Field("doc",  btext, Field.Store.YES,Field.Index.ANALYZED));
            bdoc.add(new Field("name", "李四", Field.Store.YES,Field.Index.NOT_ANALYZED));
            bwriter.addDocument(bdoc);
            bwriter.close();
            
            searchers = new IndexSearcher[2];
            searchers[0]=new IndexSearcher(a);
            searchers[1]=new IndexSearcher(b);
            
            MultiSearcher searcher=new MultiSearcher(searchers);
            //对2个索引进行搜索

            String[] fields =new String[]{"aid","doc","name"};
            Query query=IKQueryParser.parseMultiField(fields, "张三");
//            Query query=IKQueryParser.parse("doc", "市民卡");
            TopDocs topDocs = searcher.search(query, 200);
            ScoreDoc[] hits = topDocs.scoreDocs;
            for (int i = 0; i < hits.length; i++) {
                Document doc = searcher.doc(hits[i].doc);
                System.out.println("name:"+doc.get("name"));
                System.out.println("aid:"+doc.get("aid")+"bid:"+doc.get("bid"));
                System.out.println("doc:"+doc.get("doc"));
            }
            assertNotNull(topDocs);
          
        } catch (CorruptIndexException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (LockObtainFailedException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
       
//        List<User> userList = userService.getUserList();
//        userIndexService.createIndex(userList);
    }