#下载：https://github.com/medcl/elasticsearch-analysis-ik/releases
cd /usr/local/elasticsearch-7.9.3/bin
./elasticsearch-plugin install  https://github.com/medcl/elasticsearch-analysis-ik/releases/download/v7.9.3/elasticsearch-analysis-ik-7.9.3.zip

重启ES:

ps -ef | grep elastic
kill -9 1710[进程号]
sh elasticsearch -d

#配置IK分词器
PUT /ikdb?pretty
{
    "settings" : {
        "analysis" : {
            "analyzer" : {
                "ik" : {
                    "tokenizer" : "ik_max_word"
                }
            }
        }
    }
}

POST /ikdb/article?pretty=true
{
	"mappings": {
		"properties": {
			"subject": {
				"index": true,
				"type": "keyword"
			}
		}
	}
}


#查询
POST /ikdb/article/_search?pretty
{
  "query" : { "match" : { "subject" : "希拉里和韩国" }}
}
	
说明：ik带有两个分词器:
ik_max_word ：会将文本做最细粒度的拆分；尽可能多的拆分出词语
句子：我爱我的祖国
结果： 我|爱|我|的|祖|国|祖国
ik_smart：会做最粗粒度的拆分；已被分出的词语将不会再次被其它词语占有
句子：我爱我的祖国
结果： 我|爱|我|的|祖国

#查看分词效果
GET _analyze?pretty
{
  "analyzer": "ik_max_word",
  "text": "我爱我的祖国"
}

#插入测试数据
POST /ikdb/article/_bulk?pretty
{ "index" : { "_id" : "1" } }
{"subject" : "＂闺蜜＂崔顺实被韩检方传唤 韩总统府促彻查真相" }
{ "index" : { "_id" : "2" } }
{"subject" : "韩举行＂护国训练＂ 青瓦台:决不许国家安全出问题" }
{ "index" : { "_id" : "3" } }
{"subject" : "媒体称FBI已经取得搜查令 检视希拉里电邮" }
{ "index" : { "_id" : "4" } }
{"subject" : "村上春树获安徒生奖 演讲中谈及欧洲排外问题" }
{ "index" : { "_id" : "5" } }
{"subject" : "希拉里团队炮轰FBI 参院民主党领袖批其”违法”" }

#对"希拉里和韩国"进行分词查询
POST /ikdb/article/_search?pretty
{
    "query" : { "match" : { "subject" : "希拉里和韩国" }},
    "highlight" : {
        "pre_tags" : ["<font color=red>"],
        "post_tags" : ["</font>"],
        "fields" : {
            "subject" : {}
        }
    }
}

#修改mappings
POST /ikdb/article?pretty=true
{
	"mappings": {
		"properties": {
			"subject": {
				"index": true,
				"type": "keyword"
			},
			"author": {
				"index": true,
				"type": "keyword"
			}
		}
	}
}

#插入测试数据
POST /ikdb/article/_bulk?pretty
{ "index" : { "_id" : "6" } }
{"subject" : "＂闺蜜＂崔顺实被韩检方传唤 韩总统府促彻查真相","author":"czl" }

#查询
POST /ikdb/article/_search?pretty
{
  "query" : { "match" : { "author" : "czl" }}
}

#热词更新

运行效果：