ElasticSearch6.x学习笔记：15.检索入门

15.1 准备数据

[es@node1 ~]$ vi  website.json 
[es@node1 ~]$ cat website.json
{ "index":{ "_index": "website", "_type": "blog", "_id": "1" }}
{ "title": "Ambari源码编译","author":"程裕强","postdate":"2016-12-21","abstract":"CentOS7.x下的Ambari2.4源码编译","url":"http://url.cn/53788351"}
{ "index":{ "_index": "website", "_type": "blog", "_id": "2" }}
{ "title": "watchman源码编译","author":"程裕强","postdate":"2016-12-23","abstract":"CentOS7.x的watchman源码编译","url":"http://url.cn/53844169"}
{ "index":{ "_index": "website", "_type": "blog", "_id": "3" }}
{ "title": "CentOS升级gcc","author":"程裕强","postdate":"2016-12-25","abstract":"CentOS升级gcc","url":"http://url.cn/53868915"}
{ "index":{ "_index": "website", "_type": "blog", "_id": "4" }}
{ "title": "vmware复制虚拟机","author":"程裕强","postdate":"2016-12-29","abstract":"vmware复制虚拟机","url":"http://url.cn/53946664"}
{ "index":{ "_index": "website", "_type": "blog", "_id": "5" }}
{ "title": "libstdc++.so.6","author":"程裕强","postdate":"2016-12-30","abstract":"libstdc++.so.6问题解决","url":"http://url.cn/53946911"}
{ "index":{ "_index": "website", "_type": "blog", "_id": "6" }}
{ "title": "CentOS更换国内yum源","author":"程裕强","postdate":"2016-12-30","abstract":"CentOS更换国内yum源","url":"http://url.cn/53946911"}
{ "index":{ "_index": "website", "_type": "blog", "_id": "7" }}
{ "title": "搭建Ember开发环境","author":"程裕强","postdate":"2016-12-30","abstract":"CentOS下搭建Ember开发环境","url":"http://url.cn/53947507"}
{ "index":{ "_index": "website", "_type": "blog", "_id": "8" }}
{ "title": "es高亮","author":"程裕强","postdate":"2017-01-03","abstract":"Elasticsearch查询关键字高亮","url":"http://url/53991802"}
{ "index":{ "_index": "website", "_type": "blog", "_id": "9" }}
{ "title": "to be or not to be","author":"somebody","postdate":"2018-01-03","abstract":"to be or not to be,that is the question","url":"http://url/63991802"}
[es@node1 ~]$

15.2 创建索引

PUT website
{
  "settings": {
    "number_of_replicas": 1,
    "number_of_shards": 5
  },
  "mappings": {
    "blog":{
      "properties": {
        "title":{
          "type":"text",
          "analyzer": "ik_max_word"
        },
        "author":{
          "type":"text"
        },
        "postdate":{
          "type":"date",
          "format": "yyyy-MM-dd"
        },
        "abstract":{
          "type":"text",
          "analyzer": "ik_max_word"
        },
        "url":{
          "type":"text"
        }
      }
    }  
  }
}

15.3 批量导入

[es@node1 ~]$ curl -XPOST "http://node1:9200/_bulk?pretty" -H "Content-Type: application/json;charset=UTF-8" --data-binary @website.json
{
  "took" : 28,
  "errors" : false,
  "items" : [
    {
      "index" : {
        "_index" : "website",
        "_type" : "blog",
        "_id" : "1",
        "_version" : 1,
        "result" : "created",
        "_shards" : {
          "total" : 2,
          "successful" : 1,
          "failed" : 0
        },
        "_seq_no" : 0,
        "_primary_term" : 1,
        "status" : 201
      }
    },
    {
      "index" : {
        "_index" : "website",
        "_type" : "blog",
        "_id" : "2",
        "_version" : 1,
        "result" : "created",
        "_shards" : {
          "total" : 2,
          "successful" : 1,
          "failed" : 0
        },
        "_seq_no" : 0,
        "_primary_term" : 1,
        "status" : 201
      }
    },
    {
      "index" : {
        "_index" : "website",
        "_type" : "blog",
        "_id" : "3",
        "_version" : 1,
        "result" : "created",
        "_shards" : {
          "total" : 2,
          "successful" : 1,
          "failed" : 0
        },
        "_seq_no" : 0,
        "_primary_term" : 1,
        "status" : 201
      }
    },
    {
      "index" : {
        "_index" : "website",
        "_type" : "blog",
        "_id" : "4",
        "_version" : 1,
        "result" : "created",
        "_shards" : {
          "total" : 2,
          "successful" : 1,
          "failed" : 0
        },
        "_seq_no" : 1,
        "_primary_term" : 1,
        "status" : 201
      }
    },
    {
      "index" : {
        "_index" : "website",
        "_type" : "blog",
        "_id" : "5",
        "_version" : 1,
        "result" : "created",
        "_shards" : {
          "total" : 2,
          "successful" : 1,
          "failed" : 0
        },
        "_seq_no" : 0,
        "_primary_term" : 1,
        "status" : 201
      }
    },
    {
      "index" : {
        "_index" : "website",
        "_type" : "blog",
        "_id" : "6",
        "_version" : 1,
        "result" : "created",
        "_shards" : {
          "total" : 2,
          "successful" : 1,
          "failed" : 0
        },
        "_seq_no" : 2,
        "_primary_term" : 1,
        "status" : 201
      }
    },
    {
      "index" : {
        "_index" : "website",
        "_type" : "blog",
        "_id" : "7",
        "_version" : 1,
        "result" : "created",
        "_shards" : {
          "total" : 2,
          "successful" : 1,
          "failed" : 0
        },
        "_seq_no" : 1,
        "_primary_term" : 1,
        "status" : 201
      }
    },
    {
      "index" : {
        "_index" : "website",
        "_type" : "blog",
        "_id" : "8",
        "_version" : 1,
        "result" : "created",
        "_shards" : {
          "total" : 2,
          "successful" : 1,
          "failed" : 0
        },
        "_seq_no" : 1,
        "_primary_term" : 1,
        "status" : 201
      }
    },
    {
      "index" : {
        "_index" : "website",
        "_type" : "blog",
        "_id" : "9",
        "_version" : 1,
        "result" : "created",
        "_shards" : {
          "total" : 2,
          "successful" : 1,
          "failed" : 0
        },
        "_seq_no" : 2,
        "_primary_term" : 1,
        "status" : 201
      }
    }
  ]
}
[es@node1 ~]$ 

15.4 term查询

GET website/_search
{
  "query": {
    "term": {
        "title": "vmware"
    }
  }
}

{
  "took": 3,
  "timed_out": false,
  "_shards": {
 "total": 5,
 "successful": 5,
 "skipped": 0,
 "failed": 0
 },
  "hits": {
 "total": 1,
 "max_score": 0.9227539,
 "hits": [
 {
 "_index": "website",
 "_type": "blog",
 "_id": "4",
 "_score": 0.9227539,
 "_source": {
 "title": "vmware复制虚拟机",
 "author": "程裕强",
 "postdate": "2016-12-29",
 "abstract": "vmware复制虚拟机",
 "url": "http://url/53946664"
 }
 }
 ]
 }
}

15.5 分页

GET website/_search
{
  "from":0,
  "size":3,
  "query": {
    "match_all": {}
  }
}

{
  "took": 3,
  "timed_out": false,
  "_shards": {
 "total": 5,
 "successful": 5,
 "skipped": 0,
 "failed": 0
 },
  "hits": {
 "total": 8,
 "max_score": 1,
 "hits": [
 {
 "_index": "website",
 "_type": "blog",
 "_id": "5",
 "_score": 1,
 "_source": {
 "title": "libstdc++.so.6",
 "author": "程裕强",
 "postdate": "2016-12-30",
 "abstract": "libstdc++.so.6问题解决",
 "url": "http://url/53946911"
 }
 },
 {
 "_index": "website",
 "_type": "blog",
 "_id": "8",
 "_score": 1,
 "_source": {
 "title": "es高亮",
 "author": "程裕强",
 "postdate": "2017-01-03",
 "abstract": "Elasticsearch查询关键字高亮",
 "url": "http://url/53991802"
 }
 },
 {
 "_index": "website",
 "_type": "blog",
 "_id": "2",
 "_score": 1,
 "_source": {
 "title": "watchman源码编译",
 "author": "程裕强",
 "postdate": "2016-12-23",
 "abstract": "CentOS7.x的watchman源码编译",
 "url": "http://url.cn/53844169"
 }
 }
 ]
 }
}

15.6 过滤字段

GET website/_search
{
  "_source": ["title","author"], 
  "query": {
    "term": {
        "title": "centos"
    }
  }
}

{
  "took": 4,
  "timed_out": false,
  "_shards": {
 "total": 5,
 "successful": 5,
 "skipped": 0,
 "failed": 0
 },
  "hits": {
 "total": 2,
 "max_score": 0.9227539,
 "hits": [
 {
 "_index": "website",
 "_type": "blog",
 "_id": "6",
 "_score": 0.9227539,
 "_source": {
 "author": "程裕强",
 "title": "CentOS更换国内yum源"
 }
 },
 {
 "_index": "website",
 "_type": "blog",
 "_id": "3",
 "_score": 0.2876821,
 "_source": {
 "author": "程裕强",
 "title": "CentOS升级gcc"
 }
 }
 ]
 }
}

15.7 显示version

GET website/_search
{
  "_source": ["title"], 
  "version": true, 
  "query": {
    "term": {
        "title": "centos"
    }
  }
}

{
  "took": 5,
  "timed_out": false,
  "_shards": {
 "total": 5,
 "successful": 5,
 "skipped": 0,
 "failed": 0
 },
  "hits": {
 "total": 2,
 "max_score": 0.9227539,
 "hits": [
 {
 "_index": "website",
 "_type": "blog",
 "_id": "6",
 "_version": 1,
 "_score": 0.9227539,
 "_source": {
 "title": "CentOS更换国内yum源"
 }
 },
 {
 "_index": "website",
 "_type": "blog",
 "_id": "3",
 "_version": 1,
 "_score": 0.2876821,
 "_source": {
 "title": "CentOS升级gcc"
 }
 }
 ]
 }
}

15.8 评分过滤

GET website/_search
{
  "min_score":"0.5",
  "query": {
    "term": {
        "title": "centos"
    }
  }
}

{
  "took": 3,
  "timed_out": false,
  "_shards": {
 "total": 5,
 "successful": 5,
 "skipped": 0,
 "failed": 0
 },
  "hits": {
 "total": 1,
 "max_score": 0.9227539,
 "hits": [
 {
 "_index": "website",
 "_type": "blog",
 "_id": "6",
 "_score": 0.9227539,
 "_source": {
 "title": "CentOS更换国内yum源",
 "author": "程裕强",
 "postdate": "2016-12-30",
 "abstract": "CentOS更换国内yum源",
 "url": "http://url/53946911"
 }
 }
 ]
 }
}

15.9 高亮关键字

GET website/_search
{
  "query": {
    "term": {
        "title": "centos"
    }
  },
  "highlight": {
    "fields": {
      "title": {}
    }
  }
}

{
  "took": 6,
  "timed_out": false,
  "_shards": {
 "total": 5,
 "successful": 5,
 "skipped": 0,
 "failed": 0
 },
  "hits": {
 "total": 2,
 "max_score": 0.9227539,
 "hits": [
 {
 "_index": "website",
 "_type": "blog",
 "_id": "6",
 "_score": 0.9227539,
 "_source": {
 "title": "CentOS更换国内yum源",
 "author": "程裕强",
 "postdate": "2016-12-30",
 "abstract": "CentOS更换国内yum源",
 "url": "http://url/53946911"
 },
 "highlight": {
 "title": [
 "CentOS更换国内yum源"
 ]
 }
 },
 {
 "_index": "website",
 "_type": "blog",
 "_id": "3",
 "_score": 0.2876821,
 "_source": {
 "title": "CentOS升级gcc",
 "author": "程裕强",
 "postdate": "2016-12-25",
 "abstract": "CentOS升级gcc",
 "url": "http://url/53868915"
 },
 "highlight": {
 "title": [
 "CentOS升级gcc"
 ]
 }
 }
 ]
 }
}