elasticsearch ik分词 自定义词典自动更新满足两个条件：
1.GET请求返回词典列表。
2. nginx 服务器 HEAD请求回应头Last-Modified和（或）ETag。
根据这两种情况，可分为直接访问资源文件和访问接口。
文件
以文件的形式更新词典，将单词放在一起utf在8编码的文件中，将文件放置在文件中nginx或其他server下，文件修改时http server响应将在客户端请求文件中自动返回Last-Modified和ETag。在analysis-ik当检测到字典更新时，会自动更新。
以nginx例如，假设词典文件被命名为mydic.dic。前提条件如nginx配置、IKAnalyzer.cfg.xml这里省略了配置、重启等步骤，当词典为空文件时。
配置
vim /usr/local/elasticsearch/plugins/ik/config/IKAnalyzer.cfg.xml
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE properties SYSTEM "http://java.sun.com/dtd/properties.dtd"> <properties> <comment>IK Analyzer 扩展配置</comment> <!--用户可以在这里配置自己的扩展字典 --> <entry key="ext_dict"></entry> <!--用户可以在这里配置自己的扩展来停止词典--> <entry key="ext_stopwords"></entry> <!--用户可以在这里配置远程扩展字典 --> <entry key="remote_ext_dict">http://172.168.10.48/dict/brand.dic;http://172.168.10.48/dict/attr.dic;http://172.168.10.48/dict/category.dic</entry> <!--用户可以在这里配置远程扩展停止词典--> <entry key="remote_ext_stopwords">http://172.168.10.48/dict/stop.dic</entry> </properties> 日志
[root@k8s-node3 log]# tail -f beta_elasticsearch.log [2021-02-05T11:16:03,862][INFO ][o.w.a.d.Dictionary ] [node-48] 比较仪台架 [2021-02-05T11:16:03,862][INFO ][o.w.a.d.Dictionary ] [node-48] 其他工业用水处理设备 [2021-02-05T11:16:03,862][INFO ][o.w.a.d.Dictionary ] [node-48] 家用垃圾桶 [2021-02-05T11:16:03,862][INFO ][o.w.a.d.Dictionary ] [node-48] 6.3MM系列十字旋具头套筒 [2021-02-05T11:16:03,862][INFO ][o.w.a.d.Dictionary ] [node-48] 除污器 [2021-02-05T11:16:03,862][INFO ][o.w.a.d.Dictionary ] [node-48] 双色橡塑柄加力一字螺丝批 [2021-02-05T11:16:03,862][INFO ][o.w.a.d.Dictionary ] [node-48] SDS信息栏 [2021-02-05T11:16:03,862][INFO ][o.w.a.d.Dictionary ] [node-48] 防盗锁芯 [2021-02-05T11:16:03,862][INFO ][o.w.a.d.Dictionary ] [node-48] 分析天平 [2021-02-05T11:16:03,862][INFO ][o.w.a.d.Dictionary ] [node-48] 真空计量 [2021-02-05T11:16:03,862][INFO ][o.w.a.d.Dictionary ] [node-48] 光柄扎线钳 [2021-02-05T11:16:03,862][INFO ][o.w.a.d.Dictionary ] [node-48] 双金属复合管帽 [2021-02-05T11:16:03,862][INFO ][o.w.a.d.Dictionary ] [node-48] 恒温槽 [2021-02-05T11:16:03,862][INFO ][o.w.a.d.Dictionary ] [node-48] 鸡尾锯 [2021-02-05T11:16:03,862][INFO ][o.w.a.d.Dictionary ] [node-48] 喉箍 [2021-02-05T11:16:03,862][INFO ][o.w.a.d.Dictionary ] [node-48] 热风焊枪 [2021-02-05T11:16:03,862][INFO ][o.w.a.d.Dictionary ] [node-48] 管端突缘 [2021-02-05T11:16:03,862][INFO ][o.w.a.d.Dictionary ] [node-48] 动力工具和耗材 [2021-02-05T11:16:03,862][INFO ][o.w.a.d.Dictionary ] [node-48] 橡胶水带 [2021-02-05T11:16:03,862][INFO ][o.w.a.d.Dictionary ] [node-48] 密封圈、条 [2021-02-05T11:16:03,862][INFO ][o.w.a.d.Dictionary ] [node-48] 普通压力表配件 [2021-02-05T11:16:03,862][INFO ][o.w.a.d.Dictionary ] [node-48] 135°塑料弯头 [2021-02-05T11:16:03,862][INFO ][o.w.a.d.Dictionary ] [node-48] 台垫 [2021-02-05T11:16:03,862][INFO ][o.w.a.d.Dictionary ] [node-48] 井架逃生装置 [2021-02-05T11:16:03,862][INFO ][o.w.a.d.Dictionary ] [node-48] 精密恒温水槽 [2021-02-05T11:16:03,862][INFO ][o.w.a.d.Dictionary ] [node-48] 塑料量筒 [2021-02-05T11:16:03,862][INFO ][o.w.a.d.Dictionary ] [node-48] 12.5MM英制十二角套筒系列 [2021-02-05T11:16:03,862][INFO ][o.w.a.d.Dictionary ] [node-48] 钢制门锁体 [2021-02-05T11:16:03,862][INFO ][o.w.a.d.Dictionary ] [node-48] 防尘连接管 [2021-02-05T11:16:03,862][INFO ][o.w.a.d.Dictionary ] [node-48] 结构粘接胶 [2021-02-05T11:16:03,862][INFO ][o.w.a.d.Dictionary ] [node-48] 耐火砖浇铸 [2021-02-05T11:16:03,862][INFO ][o.w.a.d.Dictionary ] [node-48] 沥青干燥清漆 [2021-02-05T11:16:03,862][INFO ][o.w.a.d.Dictionary ] [node-48] 防腐活接头 [2021-02-05T11:16:03,862][INFO ][o.w.a.d.Dictionary ] [node-48] 加样槽 [2021-02-05T11:16:03,862][INFO ][o.w.a.d.Dictionary ] [node-48] 口罩 [2021-02-05T11:16:03,862][INFO ][o.w.a.d.Dictionary ] [node-48] 绝缘公制六角套筒 [2021-02-05T11:16:03,862][INFO ][o.w.a.d.Dictionary ] [node-48] 桩工机械 [2021-02-05T11:16:03,862][INFO ][o.w.a.d.Dictionary ] [node-48] 导热油锅炉 [2021-02-05T11:16:03,862][INFO ][o.w.a.d.Dictionary ] [node-48] 摇式给料机 [2021-02-05T11:16:03,862][INFO ][o.w.a.d.Dictionary ] [node-48] [Dict Loading] http://172.168.10.48/dict/stop.dic [2021-02-05T11:16:03,864][INFO ][o.w.a.d.Dictionary ] [node-48] [ [2021-02-05T11:16:03,864][INFO ][o.w.a.d.Dictionary ] [node-48] ] [2021-02-05T11:16:03,864][INFO ][o.wa.d.Dictionary ] [node-48] { [2021-02-05T11:16:03,864][INFO ][o.w.a.d.Dictionary ] [node-48] } [2021-02-05T11:16:03,864][INFO ][o.w.a.d.Dictionary ] [node-48] & [2021-02-05T11:16:03,864][INFO ][o.w.a.d.Dictionary ] [node-48] * [2021-02-05T11:16:03,864][INFO ][o.w.a.d.Dictionary ] [node-48] / [2021-02-05T11:16:03,864][INFO ][o.w.a.d.Dictionary ] [node-48] \ [2021-02-05T11:16:03,864][INFO ][o.w.a.d.Dictionary ] [node-48] reload ik dict finished.