resthighlevelclient 批量更新

RestHighLevelClient可以使用updateByQuery实现批量更新操作。您可以使用以下代码示例来实现这一功能：

public Boolean updateByQuery(RestHighLevelClient client) {
    UpdateByQueryRequest updateByQuery = new UpdateByQueryRequest("索引名");
    updateByQuery.setSlices(2); // 设置分片并行
    updateByQuery.setConflicts("proceed"); // 设置版本冲突时继续执行
    updateByQuery.setRefresh(true); // 更新完成后刷新索引

    BoolQueryBuilder boolQueryBuilder = QueryBuilders.boolQuery()
        .must(QueryBuilders.termQuery("age", "24"))
        .should(QueryBuilders.termQuery("name", "张三"));
    updateByQuery.setQuery(boolQueryBuilder);

    updateByQuery.setScript(new Script("ctx._source['addr']='北京'")); // 设置要修改的内容

    try {
        BulkByScrollResponse response = client.updateByQuery(updateByQuery, RequestOptions.DEFAULT);
        return response.getStatus().getUpdated() > 0 ? true : false;
    } catch (IOException e) {
        e.printStackTrace();
    }
    return false;
}

上述代码会更新"age"字段为24并且"name"字段为"张三"的文档的"addr"字段为"北京"。您只需将代码中的"索引名"替换为您实际的索引名，然后调用此方法即可实现批量更新。请确保您已正确引入RestHighLevelClient的依赖并初始化了该对象。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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