ES简单教程（四）使用ElasticsearchRestTemplate多条件分页查询（复杂版）

TIPS：本文实现类似数据库后台管理系统的多条件分页查询。

package com.test.impl;

/**
 * TestIndex实现类impl，实现多条件分页查询
 */
@Service
public class TestIndexServiceImpl implements TestIndexService {
    
    

    private static final Logger LOGGER = LoggerFactory.getLogger(TestIndexServiceImpl.class);

    @Autowired
    private ElasticsearchRestTemplate elasticsearchRestTemplate;

	//TestIndexListQuery query为条件查询对象，封装了一些需要查询的字段
    @Override
    public Page<TestIndex> list(TestIndexListQuery query) {
    
    
        Integer pageNum = query.getPageNum();
        Integer pageSize = query.getPageSize();

        //组装查询条件 must类似and匹配到所有字段后进行组合查询
        BoolQueryBuilder queryBuilder = QueryBuilders.boolQuery();
        if(StringUtils.isNotBlank(query.getItem_id())){
    
    
            queryBuilder.must(termQuery("item_id", query.getItem_id()));
        }
        if(StringUtils.isNotBlank(query.getItem_name())){
    
    
            //类似like的操作，针对不能分词的字段进行模糊查询，数据量大不推荐，性能不友好
            queryBuilder.must(wildcardQuery("item_name", "*"+query.getItem_name()+"*"));
        }
        if(StringUtils.isNotBlank(query.getArea_code())){
    
    
            queryBuilder.must(termQuery("area_code", query.getArea_code()));
        }
        if(StringUtils.isNotBlank(query.getUser_name())){
    
    
            queryBuilder.must(QueryBuilders.wildcardQuery("user_name", "*"+query.getUser_name()+"*"));
        }
        if(StringUtils.isNotBlank(query.getPhone())){
    
    
            queryBuilder.must(termQuery("phone", query.getPhone()));
        }
        if (Objects.nonNull(query.getStartTime())) {
    
    
            queryBuilder.must(QueryBuilders.rangeQuery("createdatetime").gte(query.getStartTime()));
        }
        if (Objects.nonNull(query.getEndTime())) {
    
    
            queryBuilder.must(QueryBuilders.rangeQuery("createdatetime").lte(query.getEndTime()));
        }

        NativeSearchQuery build = new NativeSearchQueryBuilder()
                .withQuery(queryBuilder)
                .withPageable(PageRequest.of(pageNum, pageSize))
                .withHighlightFields(//字段高亮设值
                        new HighlightBuilder.Field("seek_title").preTags("<em>").postTags("</em>")
//                        new HighlightBuilder.Field("seek_title").preTags("<span style='color:blue'>").postTags("</span>")
                )
                .build();
        LOGGER.info("列表查询的语句：{}", build.getQuery().toString());

        SearchHits<Seek> search = elasticsearchRestTemplate.search(build, Seek.class);
        SearchPage<Seek> page = SearchHitSupport.searchPageFor(search, build.getPageable());

        //高亮结果集，也可以用page.getHighlightFields()获取
        List<Seek> list = new ArrayList<>();
        for (SearchHit<Seek> each : page) {
    
    
            Seek vo = each.getContent();
            //高亮设值
            if (each.getHighlightFields().get("seek_title") != null) {
    
    
                vo.setSeek_title(each.getHighlightFields().get("seek_title").get(0));
            }
            list.add(vo);
        }
        //组装分页对象
        Page<Seek> pageInfo = new PageImpl<>(list, build.getPageable(), search.getTotalHits());
//        PageImpl<Seek> pageInfo = new PageImpl<Seek>(list, build.getPageable(), search.getTotalHits());
        return pageInfo;
    }

}