官網：https://www.elastic.co/guide/en/elasticsearch/client/java-api/current/java-docs-delete-by-query.html

The delete by query API allows one to delete a given set of documents based onthe result of a query:

BulkByScrollResponse response =DeleteByQueryAction.INSTANCE.newRequestBuilder(client).filter(QueryBuilders.matchQuery("gender", "male")) .source("persons") .get(); long deleted = response.getDeleted();

	query
	index
	execute the operation
	number of deleted documents

As it can be a long running operation, if you wish to do it asynchronously, you can call execute instead of getand provide a listener like:

DeleteByQueryAction.INSTANCE.newRequestBuilder(client).filter(QueryBuilders.matchQuery("gender", "male")) .source("persons") .execute(new ActionListener<BulkIndexByScrollResponse>() { @Overridepublic void onResponse(BulkIndexByScrollResponse response) {long deleted = response.getDeleted(); }@Overridepublic void onFailure(Exception e) {// Handle the exception}});

	query
	index
	listener
	number of deleted documents

總結

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