Distributed search engine Elasticsearch (insert data and Java API II)

Source: Internet
Author: User

To group queries by aggregation:

  

SearchResponse response = Client.preparesearch (Index_douban). Settypes (Type_douban)
. Addaggregation (
Aggregationbuilders.terms ("By_" +tag). Field (TAG). Size (1000)
)

. Execute (). Actionget ();

Terms Terms = Response.getaggregations (). Get ("By_" +tag);
For (Bucket b:terms.getbuckets ()) {
Sum sum = b.getaggregations (). Get ("sum");
List.add (String) B.getkey ());
System.out.println ("Filedname:" +b.getkey () + "Doccount:" +b.getdoccount ());
}

It is important to note that the return quantity is not the same as before SetSize (), but to set the size of the Aggregationbuilders line, and second: for non-numeric and English fields, such a combination of queries by default will be word processing, So to use mapping to set the field of the word or not, this part of the detailed description later.

Distributed search engine Elasticsearch (insert data and Java API II)

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.