es 判断空字符串字段 ，null 值

package com.xx.utils;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.gtcom.config.RestClientConfig;
import lombok.extern.slf4j.Slf4j;
import org.elasticsearch.action.bulk.BulkItemResponse;
import org.elasticsearch.action.bulk.BulkRequest;
import org.elasticsearch.action.bulk.BulkResponse;
import org.elasticsearch.action.index.IndexResponse;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.action.search.SearchType;
import org.elasticsearch.action.support.WriteRequest;
import org.elasticsearch.action.update.UpdateRequest;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.Requests;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.common.xcontent.XContentType;
import org.elasticsearch.index.query.BoolQueryBuilder;
import org.elasticsearch.index.query.QueryBuilder;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.rest.RestStatus;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.SearchHits;
import org.elasticsearch.search.aggregations.AggregationBuilders;
import org.elasticsearch.search.aggregations.Aggregations;
import org.elasticsearch.search.aggregations.bucket.terms.Terms;
import org.elasticsearch.search.aggregations.bucket.terms.TermsAggregationBuilder;
import org.elasticsearch.search.builder.SearchSourceBuilder;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Component;
import java.io.IOException;
import java.util.*;

/**
 * @author tongyinlong
 * @version 1.0
 * @description: TODO
 * @date 2021/11/4 16:47
 */
@Slf4j
@Component
public class EsUtils {
   


    @Autowired
    @Qualifier(RestClientConfig.ES_CLIENT_1)
    private RestHighLevelClient esClient1;

    @Autowired
    @Qualifier(RestClientConfig.ES_CLIENT_2)
    private RestHighLevelClient esClient2;


    /**
     * ES 批量修改数据（同步）
     *
     * @param indexName:      索引名称
     * @param primaryKeyName: 主键名称
     * @param paramListJson:  数据集合JSON
     * @return 批量修改结果
     * @date 2021/11/4 16:40
     * @author tongyinlong
     **/
    public boolean updateDataBatch(String indexName, String primaryKeyName, String paramListJson) {
   

        BulkRequest bulkRequest = packBulkUpdateRequest(indexName, primaryKeyName, paramListJson);
        if (bulkRequest.requests().isEmpty(