如何提供突出显示与弹簧数据的弹性搜索 [英] How to provide highlighting with Spring data elasticsearch

问题描述

似乎SpringData ES不提供类来获取ES返回的亮点。 Spring数据可以返回对象列表，但由ES返回的Json中的突出显示部分位于不由ElasticSearchTemplate类处理的单独部分。

it seems that SpringData ES don't provide classes to fetch highlights returned by ES. Spring Data can return Lists of Objects but the highlights sections in the Json returned by ES is in a separated part that is not handled by the "ElasticSearchTemplate" class.

代码示例： -

QueryBuilder query = QueryBuilders.matchQuery("name","tom"); 
SearchQuery searchQuery =new NativeSearchQueryBuilder().withQuery(query).
                               with HighlightFields(new Field("name")).build();
List<ESDocument> publications = elasticsearchTemplate.queryForList
                                                (searchQuery, ESDocument.class);

我一定是错的，但是我不能仅仅用SpringDataES来做。有人可以发表一个例子，说明我们如何使用Spring Data ES获得高分？

I must be wrong, but I can't figure out to do only with SpringDataES. Someone can post an example of how we can get highlights with Spring Data ES ?

提前感谢！

推荐答案

从弹簧数据弹性测试的测试用例我已经找到了解决方案： -

From the test cases in spring data elasticsearch I've found solution to this :-

这可以是有帮助的。 >

This can be helpful.

@Test
public void shouldReturnHighlightedFieldsForGivenQueryAndFields() {

    //given
    String documentId = randomNumeric(5);
    String actualMessage = "some test message";
    String highlightedMessage = "some <em>test</em> message";

    SampleEntity sampleEntity = SampleEntity.builder().id(documentId)
            .message(actualMessage)
            .version(System.currentTimeMillis()).build();

    IndexQuery indexQuery = getIndexQuery(sampleEntity);

    elasticsearchTemplate.index(indexQuery);
    elasticsearchTemplate.refresh(SampleEntity.class);

    SearchQuery searchQuery = new NativeSearchQueryBuilder()
            .withQuery(termQuery("message", "test"))
            .withHighlightFields(new HighlightBuilder.Field("message"))
            .build();

    Page<SampleEntity> sampleEntities = elasticsearchTemplate.queryForPage(searchQuery, SampleEntity.class, new SearchResultMapper() {
        @Override
        public <T> Page<T> mapResults(SearchResponse response, Class<T> clazz, Pageable pageable) {
            List<SampleEntity> chunk = new ArrayList<SampleEntity>();
            for (SearchHit searchHit : response.getHits()) {
                if (response.getHits().getHits().length <= 0) {
                    return null;
                }
                SampleEntity user = new SampleEntity();
                user.setId(searchHit.getId());
                user.setMessage((String) searchHit.getSource().get("message"));
                user.setHighlightedMessage(searchHit.getHighlightFields().get("message").fragments()[0].toString());
                chunk.add(user);
            }
            if (chunk.size() > 0) {
                return new PageImpl<T>((List<T>) chunk);
            }
            return null;
        }
    });

    assertThat(sampleEntities.getContent().get(0).getHighlightedMessage(), is(highlightedMessage));
}

这篇关于如何提供突出显示与弹簧数据的弹性搜索的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！