ElasticSearch（十三）：Spring Data ElasticSearch 的使用（三）——NativeSearchQuery 高亮查询

在Elasticsearch的实际应用中，经常需要将匹配到的结果字符进行高亮显示，此处采取NativeSearchQuery原生查询的方法，实现查询结果的高亮显示。

 /**
      * 高亮查询
      */
     @Test
     public void testNativeSearchQuery(){
         String fild="content";
         NativeSearchQuery nativeSearchQuery=new NativeSearchQueryBuilder()
                 .withQuery(QueryBuilders.queryStringQuery("黄").defaultField(fild))
                 .withHighlightFields(new HighlightBuilder.Field(fild))
                 .build();
         AggregatedPage<Film> list =  elasticsearchTemplate.queryForPage(nativeSearchQuery, Film.class, new SearchResultMapper() {
            @Override
            public <T> AggregatedPage<T> mapResults(SearchResponse response, Class<T> clazz, Pageable pageable) {
                List<Film> films = new ArrayList<>();
                SearchHits hits = response.getHits();
                for (SearchHit hit:hits){
                    if(hits.getHits().length<=0){
                        return null;
                    }
                    Film film=new Film();
                    String hightLightMessage = hit.getHighlightFields().get(fild).fragments()[0].toString();
                    film.setId(Long.parseLong(hit.getId()));
                    film.setTitle(hit.getSource().get("title").toString());
                    film.setContent(hit.getSource().get("content").toString());
                    film.setDirector(hit.getSource().get("director").toString());
                    film.setPrice(hit.getSource().get("price").toString());
                    film.setDate(hit.getSource().get("date").toString());

                    try {
                        String setMethodName = parSetName(fild);
                        Class<? extends Film> filmClass = film.getClass();
                        Method setMethod = filmClass.getMethod(setMethodName,String.class);
                        setMethod.invoke(film,hightLightMessage);
                    }catch (Exception e){
                        e.printStackTrace();
                    }
                    films.add(film);

                }
                if (films.size()>0){
                    return new AggregatedPageImpl<>((List<T>) films);
                }
                return null;
            }
        });
        list.getContent().forEach(film -> System.out.println(film));
     }

     public String parSetName(String fieldName){
         if (null == fieldName || "".equals(fieldName)) {
             return null;
         }
         int startIndex = 0;
         if (fieldName.charAt(0) == '_')
             startIndex = 1;
         return "set" + fieldName.substring(startIndex, startIndex + 1).toUpperCase()
                 + fieldName.substring(startIndex + 1);
     }

测试结果：