public void bulkUpdate(List<Map<String, Object>> users) {
        BulkOperations bulkOperations = mongoTemplate.bulkOps(BulkOperations.BulkMode.UNORDERED, getCollectionName());
        for (Map<String, Object> user : users) {
            Query query = new Query(Criteria.where("_id").is((String) user.get("_id")));
            bulkOperations.replaceOne(query, user, FindAndReplaceOptions.options().upsert());
        }
        bulkOperations.execute();
    }

//pom.xml
<parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.5.RELEASE</version>
    </parent>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.data</groupId>
                <artifactId>spring-data-releasetrain</artifactId>
                <version>Moore-RELEASE</version>
                <scope>import</scope>
                <type>pom</type>
            </dependency>
        </dependencies>
    </dependencyManagement>