elasticsearch入门，linux上简单操作

福利：

入门视频点击此处，注册账号看前几章，入门还是没问题的

入门操作：

说明：我这里新建的名称—index为test，type为kind

1、创建索引

curl -XPUT http://localhost:9200/test

补充，更详尽教程详见：java创建索引、linux创建

相应的删除索引：

curl -XDELETE  http://localhost:9200/test

2、创建restful风格插入

curl -XPOST http://localhost:9200/索引名称/索引类型/id -d JSON格式的参数

curl -XPUT http://localhost:9200/test/kind/1?pretty -d '{"title":"test_1","label":["sofa","beauty","white","American"],"create_date":"2017-11-1 15:41"}'

注意：这种方式插入，中文会报错（我就因为这问题，耽误半天）

入门实验操作：

首先——插入几条测试数据：

curl -XPUT http://localhost:9200/test/kind/1?pretty -d '{"title":"sofa_1","label":["sofa","beauty","white","American"],"create_date":"2017-11-1 15:41"}'  curl -XPUT http://localhost:9200/test/kind/2?pretty -d '{"title":"sofa_2","label":["sofa","beauty","red","American"],"create_date":"2017-11-1 14:41"}'curl -XPUT http://localhost:9200/test/kind/3?pretty -d '{"title":"sofa_3","label":["sofa","cute","red","China"],"create_date":"2017-11-1 13:41"}'curl -XPUT http://localhost:9200/test/kind/4?pretty -d '{"title":"chair_4","label":["chair","cute","red","China"],"create_date":"2017-11-1 12:41"}'curl -XPUT http://localhost:9200/test/kind/5?pretty -d '{"title":"chair_5","label":["chair","beauty","white","American"],"create_date":"2017-11-1 11:41"}'curl -XPUT http://localhost:9200/test/kind/6?pretty -d '{"title":"chair_6","label":["chair","beauty","black","China"],"create_date":"2017-11-1 10:41"}'

①、搜索lable中含有China的

curl http://localhost:9200/test/kind/_search?q=label:China

②、搜索label中含有“beauty American”相关内容

（测试结果：这里返回内容就类似搜索引擎，匹配度越高优先返回，但也有些不是这样：比如搜"white American"）

curl -X GET http://localhost:9200/test/kind/_search?pretty -d '{"query" : {"match" : {"label" : "beauty American"}}}'

便于阅读，格式化如下：

curl http://localhost:9200/test/kind/_search?pretty -d '{    "query" : {        "match" : {            "label" : "beauty American"        }    }}'

③、在满足2的基础上，再按照标签出现的次数推荐标签

curl -X GET http://localhost:9200/test/kind/_search?pretty -d '{"query" : {"match" : {"label" : "beauty American"}},"aggs": {"all_label": {"terms": { "field": "label" }}}}'

注意：这里使用elasticsearch的aggregations聚合查询有个问题，中文会被拆分成单个字统计，要将字段设置属性：

感谢文章：http://jingyan.baidu.com/article/15622f2400c160fdfcbea5e9.html

curl -X PUT http://localhost:9200/test/_mapping/kind/ -d '{"properties": {"label": {"type":"text","index": "not_analyzed"}}}'

警告：这里会报一个错误，点击：Fielddata is disabled on text fields by default
错误解决办法：执行如下操作，注意添加"_mapping",感觉这句相当于给label字段定义为text类型，设置fielddata为true：
curl -X PUT http://localhost:9200/test/_mapping/kind/ -d '{"properties": {"label": {"type":"text","index": "not_analyzed","fielddata": true}}}'