query

  /**
     * 根据页面传入数据去es中检索结果
     *
     * @param searchParam 搜索参数封装
     * @return SearchResult 里面包含页面需要的所有信息
     */
    @Override
    public SearchResult search(SearchParam searchParam) {
        //动态构建检索语句
        try {
            SearchRequest.Builder s = new SearchRequest.Builder();
//            Function<SearchRequest.Builder, ObjectBuilder<SearchRequest>> fn = s -> {
            //查询的索引
            s.index(ElasticSearchConstant.PRODUCT_INDEX);
            //查询条件
            s.query(q -> q
                    .bool(bool -> {
                        if (StringUtils.hasText(searchParam.getKeyword())) {
                            bool.must(must -> must
                                    .match(match -> match.field(ElasticSearchConstant.PRODUCT_INDEX).query(searchParam.getKeyword()))
                            );
                        }
                        bool.filter(filter -> {
                            if (searchParam.getCatalog3Id() != null) {
                                filter.term(term -> term
                                        .field("catalogId")
                                        .value(searchParam.getCatalog3Id()));
                            } else if (searchParam.getBrandId() != null && searchParam.getBrandId().size() > 0) {
                                List<FieldValue> collect = searchParam.getBrandId().stream().map(FieldValue::of).collect(Collectors.toList());
                                filter.terms(terms -> terms
                                        .field("brandId")
                                        .terms(termsValue -> termsValue
                                                .value(collect)));
                            } else if (StringUtils.hasText(searchParam.getSkuPrice())) {
                                filter.range(range -> {
                                    String skuPrice = searchParam.getSkuPrice();
                                    String[] skuRange = skuPrice.split("_");
                                    if (skuRange.length == 2) {
                                        range.field("skuPrice").gte(JsonData.of(skuRange[0])).lte(JsonData.of(skuRange[1]));
                                    } else if (skuRange.length == 1) {
                                        if (skuPrice.startsWith("_")) {
                                            range.field("skuPrice").lte(JsonData.of(skuRange[0]));
                                        } else {
                                            range.field("skuPrice").gte(JsonData.of(skuRange[0]));
                                        }
                                    }
                                    return range;
                                });
                            } else if (searchParam.getAttrs() != null && searchParam.getAttrs().size() > 0) {
                                List<String> attrs = searchParam.getAttrs();
                                for (String attr : attrs) {
                                    String[] attrString = attr.split("_");
                                    filter.nested(nested -> nested
                                            .scoreMode(ChildScoreMode.None)
                                            .path("attrs")
                                            .query(query -> query.bool(attrBool -> attrBool
                                                    .must(mustAttrs -> {
                                                                mustAttrs.term(termAttrId -> termAttrId
                                                                        .field("attrs.attrId")
                                                                        .value(attrString[0]));
                                                                mustAttrs.term(termAttrValue -> termAttrValue
                                                                        .field("attrs.attrValue")
                                                                        .value(attrString[1]));
                                                                return mustAttrs;
                                                            }
                                                    ))
                                            ));
                                }
                            }
                            filter.term(term -> term
                                    .field("hasStock")
                                    .value(searchParam.getHasStock() == 1));
                            return filter;
                        });
                        return bool;
                    })
            );

            //排序
            if (StringUtils.hasText(searchParam.getSort())) {
                String[] sortString = searchParam.getSort().split("_");
                s.sort(sort -> sort
                        .field(field -> field.field(sortString[0]).order(sortString[1].equalsIgnoreCase("asc") ? SortOrder.Asc : SortOrder.Desc)));
            }
            //分页 （起始-1） * 页面大小
            s.from((searchParam.getPageNum() - 1) * ElasticSearchConstant.PRODUCT_PAGE_SIZE);
            s.size(ElasticSearchConstant.PRODUCT_PAGE_SIZE);
            //高亮
            if (StringUtils.hasText(searchParam.getKeyword())) {
                s.highlight(h -> h
                        .fields(searchParam.getKeyword(), highlight -> highlight
                                .preTags("<b style=-'color:red'>")
                                .postTags("</b>")));
            }
//                return s;
//            };
            SearchRequest searchRequest = s.build();
            Object o = JSON.toJSON(searchRequest);
            SearchResponse<SearchResult> search = elasticsearchClient.search(searchRequest,SearchResult.class);
            String jsonString = JSON.toJSONString(searchParam);
            System.out.println(jsonString);
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }

elasticsearch java api

/**
 * 注入一个elasticsearch clent客户端
 *
 * @return ElasticsearchClient 返回elasticsearch客户端
 */
@Bean
public ElasticsearchClient getElasticsearchClient() {
    // Create the low-level client
    RestClient restClient = RestClient.builder(new HttpHost("localhost", 9200, "http")).build();
    // Create the transport with a Jackson mapper
    ElasticsearchTransport transport = new RestClientTransport(restClient, new JacksonJsonpMapper());
    // And create the API client
    return new ElasticsearchClient(transport);
}