Spring-Data-Elasticsearch实现 条件查询+分页+高亮+排序功能

一、依赖

• Spring Boot 2.4.5
• Elasticsearch 7.13.2
• Kibana 7.13.2

    org.springframework.boot
    spring-boot-starter-parent
    2.4.5
    


    org.springframework.boot
    spring-boot-starter-data-elasticsearch


    org.elasticsearch
    elasticsearch


    org.elasticsearch.client
    elasticsearch-rest-high-level-client

父类是spring-boot，注意es的版本问题，spring-boot依赖中es默认版本与本机es版本不一致会导致报错，需要进入到xml文件中修改es版本。 

二、配置

server:
  port: 8083
spring:
  application:
    name: rest
  datasource:
    druid:
      driver-class-name: com.mysql.cj.jdbc.Driver
      url: jdbc:mysql://127.0.0.1:3306/xxx?serverTimezone=Asia/Shanghai&useUnicode=true&characterEncoding=utf-8&zeroDateTimeBehavior=convertToNull&useSSL=false&allowPublicKeyRetrieval=true
      username: root
      password: root
  elasticsearch:
    rest:
      uris: http://127.0.0.1:9200
management:
  health:
    elasticsearch:
      enabled: false

 三、核心代码

1.索引实体（此处注意es时间的时间格式）

@Data
@Document(indexName = "dish_es4")
public class DishDtoEs implements Serializable {

    private static final long serialVersionUID = 1L;

    private Long id;


    //菜品名称
    @Field(analyzer = FieldAnalyzer.IK_MAX_WORD, type = FieldType.Text)
    private String name;


    //菜品分类id
    private Long categoryId;


    //菜品价格
    private BigDecimal price;


    //商品码
    private String code;


    //图片
    private String image;


    //描述信息
    private String description;


    //0 停售 1 起售
    private Integer status;


    //顺序
    private Integer sort;

    private Integer count;

    private String categoryName;

    private Integer copies;

    @TableField(fill = FieldFill.INSERT)
    @JsonFormat(pattern="yyyy-MM-dd HH:mm:ss", timezone="GMT+8")
    @Field(type = FieldType.Date, format = DateFormat.custom,pattern = "yyyy-MM-dd HH:mm:ss||yyyy-MM-dd||epoch_second")
    private LocalDateTime createTime;


    @TableField(fill = FieldFill.INSERT_UPDATE)
    @JsonFormat(pattern="yyyy-MM-dd HH:mm:ss", timezone="GMT+8")
    @Field(type = FieldType.Date, format = DateFormat.custom,pattern = "yyyy-MM-dd HH:mm:ss||yyyy-MM-dd||epoch_second")
    private LocalDateTime updateTime;


    @TableField(fill = FieldFill.INSERT)
    private Long createUser;


    @TableField(fill = FieldFill.INSERT_UPDATE)
    private Long updateUser;

}

2.Repository层

@Repository
public interface DishRepository extends ElasticsearchRepository {

}

3.service层

public interface DishService extends IService {
    /**
     * 分页查询菜品信息
     *
     * @param page
     * @param pageSize
     * @param name
     * @return
     */
    Page pageES(int page, int pageSize, String name);
}

    @Override
    public Page pageES(int page, int pageSize, String name) {
        Page pageInfo = new Page<>();
        PageRequest pageRequest = PageRequest.of(page - 1, pageSize);
        NativeSearchQueryBuilder queryBuilder = new NativeSearchQueryBuilder();
        BoolQueryBuilder boolQueryBuilder = QueryBuilders.boolQuery();
        //给name字段设置高亮显示
        if (StringUtils.isNotEmpty(name)) {
            boolQueryBuilder.must(QueryBuilders.matchQuery("name", name));
            queryBuilder.withHighlightFields(new HighlightBuilder.Field("name"))
                    .withHighlightBuilder(new HighlightBuilder().preTags("").postTags(""));
        }
        //查询条件
        queryBuilder.withQuery(boolQueryBuilder);
        //排序
        queryBuilder.withSort(SortBuilders.fieldSort("updateTime").order(SortOrder.DESC));
        //设置分页
        queryBuilder.withPageable(pageRequest);
        SearchHits search = elasticsearchRestTemplate.search(queryBuilder.build(), DishDtoEs.class);
        List> searchHits = search.getSearchHits();
        List result=new ArrayList<>(searchHits.size());
        //替换高亮内容
        for (SearchHit searchHit:searchHits){
            //高亮的内容
            Map> highlightFields = searchHit.getHighlightFields();
            //将高亮的内容填充到content中
            searchHit.getContent().setName(highlightFields.get("name")==null ? searchHit.getContent().getName():highlightFields.get("name").get(0));
            //放到实体类中
            result.add(searchHit.getContent());
        }
        long totalHits = search.getTotalHits();
        Stream> searchHitStream = search.get();
        List collect = searchHitStream.map(SearchHit::getContent).collect(Collectors.toList());
        pageInfo.setRecords(result);
        pageInfo.setTotal(totalHits);
        return pageInfo;
    }

4.controller层

@Slf4j
@RestController
@RequestMapping("/dish")
public class DishController {

    /**
     * 分页查询菜品
     *
     * @param page
     * @param pageSize
     * @param name
     * @return
     */
    @GetMapping("/page")
    public R page(int page, int pageSize, String name) {
        Page dishDtoPage = dishService.pageES(page, pageSize, name);
        return R.success(dishDtoPage);
    }

}

5.前端处理（需要加解析为html语言否则无法正常显示）

6.结果显示