官網：https://www.elastic.co/guide/en/elasticsearch/client/java-api/current/java-docs-multi-get.html

The multi get API allows to get a list of documents based on their index, type and id:

MultiGetResponse multiGetItemResponses = client.prepareMultiGet().add("twitter", "tweet", "1") .add("twitter", "tweet", "2", "3", "4") .add("another", "type", "foo") .get();for (MultiGetItemResponse itemResponse : multiGetItemResponses) { GetResponse response = itemResponse.getResponse();if (response.isExists()) { String json = response.getSourceAsString(); } }

	get by a single id
	or by a list of ids for the same index / type
	you can also get from another index
	iterate over the result set
	you can check if the document exists
	access to the _source field

總結

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