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。
1 /**
2 * 高亮查询 3 */
4 @Test 5 public void testNativeSearchQuery(){ 6 String fild="content"; 7 NativeSearchQuery nativeSearchQuery=new NativeSearchQueryBuilder() 8 .withQuery(QueryBuilders.queryStringQuery("黄").defaultField(fild)) 9 .withHighlightFields(new HighlightBuilder.Field(fild)) 10 .build(); 11 AggregatedPage<Film> list = elasticsearchTemplate.queryForPage(nativeSearchQuery, Film.class, new SearchResultMapper() { 12 @Override 13 public <T> AggregatedPage<T> mapResults(SearchResponse response, Class<T> clazz, Pageable pageable) { 14 List<Film> films = new ArrayList<>(); 15 SearchHits hits = response.getHits(); 16 for (SearchHit hit:hits){ 17 if(hits.getHits().length<=0){ 18 return null; 19 } 20 Film film=new Film(); 21 String hightLightMessage = hit.getHighlightFields().get(fild).fragments()[0].toString(); 22 film.setId(Long.parseLong(hit.getId())); 23 film.setTitle(hit.getSource().get("title").toString()); 24 film.setContent(hit.getSource().get("content").toString()); 25 film.setDirector(hit.getSource().get("director").toString()); 26 film.setPrice(hit.getSource().get("price").toString()); 27 film.setDate(hit.getSource().get("date").toString()); 28
29 try { 30 String setMethodName = parSetName(fild); 31 Class<? extends Film> filmClass = film.getClass(); 32 Method setMethod = filmClass.getMethod(setMethodName,String.class); 33 setMethod.invoke(film,hightLightMessage); 34 }catch (Exception e){ 35 e.printStackTrace(); 36 } 37 films.add(film); 38
39 } 40 if (films.size()>0){ 41 return new AggregatedPageImpl<>((List<T>) films); 42 } 43 return null; 44 } 45 }); 46 list.getContent().forEach(film -> System.out.println(film)); 47 } 48
49
50
51 public String parSetName(String fieldName){ 52 if (null == fieldName || "".equals(fieldName)) { 53 return null; 54 } 55 int startIndex = 0; 56 if (fieldName.charAt(0) == '_') 57 startIndex = 1; 58 return "set" + fieldName.substring(startIndex, startIndex + 1).toUpperCase() 59 + fieldName.substring(startIndex + 1); 60 }
测试结果：
