1. First download
https://github.com/medcl/elasticsearch-analysis-ik from github
and upload to the server after the download is complete
Unzip to this directory
Start the es server from the new to support Chinese word segmentation
Supports two modes of Analyzer: ik_smart, ik_max_word
ik_max_word analysis is more comprehensive and accurate
ik_smart analysis is relatively simple to split words
