一，ik_smart 和 ik_max_word 两种分词器
ik分词插件支持 ik_smart 和 ik_max_word 两种分词器
ik_smart - 粗粒度的分词
ik_max_word - 会尽可能的枚举可能的关键词，就是分词比较细致一些，会分解出更多的关键词
二，实际比较的例子：
ik_smart
$ curl -X GET "localhost:9200/_analyze?pretty" -H 'Content-Type: application/json' -d'
{"analyzer": "ik_smart","text": "这是一碗海鲜味方便面"
}
> '
{"tokens" : [{"token" : "这是","start_offset" : 0,"end_offset" : 2,"type" : "CN_WORD","position" : 0},{"token" : "一碗","start_offset" : 2,"end_offset" : 4,"type" : "CN_WORD","position" : 1},{"token" : "海","start_offset" : 4,"end_offset" : 5,"type" : "CN_CHAR","position" : 2},{"token" : "鲜味","start_offset" : 5,"end_offset" : 7,"type" : "CN_WORD","position" : 3},{"token" : "方便面","start_offset" : 7,"end_offset" : 10,"type" : "CN_WORD","position" : 4}]
}ik_max_word
$ curl -X GET "localhost:9200/_analyze?pretty" -H 'Content-Type: application/json' -d'
{"analyzer": "ik_max_word","text": "这是一碗海鲜味方便面"
}'
{"tokens" : [{"token" : "这是","start_offset" : 0,"end_offset" : 2,"type" : "CN_WORD","position" : 0},{"token" : "一碗","start_offset" : 2,"end_offset" : 4,"type" : "CN_WORD","position" : 1},{"token" : "一","start_offset" : 2,"end_offset" : 3,"type" : "TYPE_CNUM","position" : 2},{"token" : "碗","start_offset" : 3,"end_offset" : 4,"type" : "COUNT","position" : 3},{"token" : "海鲜","start_offset" : 4,"end_offset" : 6,"type" : "CN_WORD","position" : 4},{"token" : "鲜味","start_offset" : 5,"end_offset" : 7,"type" : "CN_WORD","position" : 5},{"token" : "方便面","start_offset" : 7,"end_offset" : 10,"type" : "CN_WORD","position" : 6},{"token" : "方便","start_offset" : 7,"end_offset" : 9,"type" : "CN_WORD","position" : 7},{"token" : "面","start_offset" : 9,"end_offset" : 10,"type" : "CN_CHAR","position" : 8}]
}