ES系列十三、Elasticsearch Suggester API(自动补全）

1.概念

1.补全api主要分为四类

1. Term Suggester（纠错补全，输入错误的情况下补全正确的单词）
2. Phrase Suggester（自动补全短语，输入一个单词补全整个短语）
3. Completion Suggester(完成补全单词，输出如前半部分，补全整个单词）
4. Context Suggester（上下文补全）

整体效果类似百度搜索，如图：

　　

2.Term Suggester(纠错补全）

2.1.api

1.建立索引

PUT /book4
{
  "mappings": {
    "english": {
      "properties": {
        "passage": {
          "type": "text"
        }
      }
    }
  }
}

2.插入数据

curl -H "Content-Type: application/json" -XPOST 'http:localhost:9200/_bulk' -d'
{ "index" : { "_index" : "book4", "_type" : "english" } }
{ "passage": "Lucene is cool"}
{ "index" : { "_index" : "book4", "_type" : "english" } }
{ "passage": "Elasticsearch builds on top of lucene"}
{ "index" : { "_index" : "book4", "_type" : "english" } }
{ "passage": "Elasticsearch rocks"}
{ "index" : { "_index" : "book4", "_type" : "english" } }
{ "passage": "Elastic is the company behind ELK stack"}
{ "index" : { "_index" : "book4", "_type" : "english" } }
{ "passage": "elk rocks"}
{ "index" : { "_index" : "book4", "_type" : "english" } }
{  "passage": "elasticsearch is rock solid"}
'

3.看下储存的分词有哪些

post /_analyze
{
  "text": [
    "Lucene is cool",
    "Elasticsearch builds on top of lucene",
    "Elasticsearch rocks",
    "Elastic is the company behind ELK stack",
    "elk rocks",
    "elasticsearch is rock solid"
  ]
}

结果：

{
    "tokens": [
        {
            "token": "lucene",
            "start_offset": 0,
            "end_offset": 6,
            "type": "<ALPHANUM>",
            "position": 0
        },
        {
            "token": "is",
            "start_offset": 7,
            "end_offset": 9,
            "type": "<ALPHANUM>",
            "position": 1
        },
        {
            "token": "cool",
            "start_offset": 10,
            "end_offset": 14,
            "type": "<ALPHANUM>",
            "position": 2
        },
        {
            "token": "elasticsearch",
            "start_offset": 15,
            "end_offset": 28,
            "type": "<ALPHANUM>",
            "position": 103
        },
        {
            "token": "builds",
            "start_offset": 29,
            "end_offset": 35,
            "type": "<ALPHANUM>",
            "position": 104
        },
        {
            "token": "on",
            "start_offset": 36,
            "end_offset": 38,
            "type": "<ALPHANUM>",
            "position": 105
        },
        {
            "token": "top",
            "start_offset": 39,
            "end_offset": 42,
            "type": "<ALPHANUM>",
            "position": 106
        },
        {
            "token": "of",
            "start_offset": 43,
            "end_offset": 45,
            "type": "<ALPHANUM>",
            "position": 107
        },
        {
            "token": "lucene",
            "start_offset": 46,
            "end_offset": 52,
            "type": "<ALPHANUM>",
            "position": 108
        },
        {
            "token": "elasticsearch",
            "start_offset": 53,
            "end_offset": 66,
            "type": "<ALPHANUM>",
            "position": 209
        },
        {
            "token": "rocks",
            "start_offset": 67,
            "end_offset": 72,
            "type": "<ALPHANUM>",
            "position": 210
        },
        {
            "token": "elastic",
            "start_offset": 73,
            "end_offset": 80,
            "type": "<ALPHANUM>",
            "position": 311
        },
        {
            "token": "is",
            "start_offset": 81,
            "end_offset": 83,
            "type": "<ALPHANUM>",
            "position": 312
        },
        {
            "token": "the",
            "start_offset": 84,
            "end_offset": 87,
            "type": "<ALPHANUM>",
            "position": 313
        },
        {
            "token": "company",
            "start_offset": 88,
            "end_offset": 95,
            "type": "<ALPHANUM>",
            "position": 314
        },
        {
            "token": "behind",
            "start_offset": 96,
            "end_offset": 102,
            "type": "<ALPHANUM>",
            "position": 315
        },
        {
            "token": "elk",
            "start_offset": 103,
            "end_offset": 106,
            "type": "<ALPHANUM>",
            "position": 316
        },
        {
            "token": "stack",
            "start_offset": 107,
            "end_offset": 112,
            "type": "<ALPHANUM>",
            "position": 317
        },
        {
            "token": "elk",
            "start_offset": 113,
            "end_offset": 116,
            "type": "<ALPHANUM>",
            "position": 418
        },
        {
            "token": "rocks",
            "start_offset": 117,
            "end_offset": 122,
            "type": "<ALPHANUM>",
            "position": 419
        },
        {
            "token": "elasticsearch",
            "start_offset": 123,
            "end_offset": 136,
            "type": "<ALPHANUM>",
            "position": 520
        },
        {
            "token": "is",
            "start_offset": 137,
            "end_offset": 139,
            "type": "<ALPHANUM>",
            "position": 521
        },
        {
            "token": "rock",
            "start_offset": 140,
            "end_offset": 144,
            "type": "<ALPHANUM>",
            "position": 522
        },
        {
            "token": "solid",
            "start_offset": 145,
            "end_offset": 150,
            "type": "<ALPHANUM>",
            "position": 523
        }
    ]
}

View Code