实际上，Spring数据API（包含或startWith）不适用于String中的空间。我已经用Elastic core api实现了相同的功能。
NativeSearchQueryBuilder aNativeSearchQueryBuilder = new NativeSearchQueryBuilder();
aNativeSearchQueryBuilder.withIndices(indexName).withTypes(type);
final BoolQueryBuilder aQuery = new BoolQueryBuilder();
aQuery.must(QueryBuilders.queryStringQuery("a b").defaultField("UserName"));
NativeSearchQuery nativeSearchQuery = aNativeSearchQueryBuilder.withQuery(aQuery).build();
List<Object> aDatas = elasticsearchTemplate.queryForList(nativeSearchQuery, Object.class);
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