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  • Elasticsearch学习(二)————搜索

    Elasticsearch
    1.query string search
    1.1.搜索全部
    // 1.
    GET http://ip:9200/test/test/_search
    结果:
    {
    "took": 86, # 耗费的时间:ms
    "timed_out": false, # 是否超时
    "_shards": { # 数据存储在5个主分片上
    "total": 5,
    "successful": 5,
    "skipped": 0,
    "failed": 0
    },
    "hits": { # 匹配结果
    "total": 3, # 查询到三个document
    "max_score": 1, # 相关度的匹配分数:分数越高越相关
    "hits": [
    {
    "_index": "test", # 索引 index
    "_type": "test", # type
    "_id": "2", # id:唯一
    "_score": 1, # 相关度的匹配分数:分数越高越相关
    "_source": { # 存储的json数据
    "first_name": "小翠", # field
    "last_name": "cuicui",
    "age": 18,
    "about": "I love to go rock climbing",
    "interests": [
    "sports",
    "music"
    ]
    }
    },
    {
    "_index": "test",
    "_type": "test",
    "_id": "1",
    "_score": 1,
    "_source": {
    "first_name": "John",
    "last_name": "Smith",
    "age": 25,
    "about": "I love to go rock climbing",
    "interests": [
    "sports",
    "music"
    ]
    }
    },
    {
    "_index": "test",
    "_type": "test",
    "_id": "AWrVpGsO0WDJvaOeQOjd",
    "_score": 1,
    "_source": {
    "first_name": "小翠",
    "last_name": "cui",
    "age": 18,
    "about": "I love to go rock climbing",
    "interests": [
    "sports",
    "music"
    ]
    }
    }
    ]
    }
    }
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    1.2.以about字段中含有climbing字符查询并根据age字段降序排列 可以多个排序,用逗号分隔:
    // 2.
    GET http://ip:9200/test/test/_search?q=about:climbing&sort=age:desc,price:desc
    GET http://ip:9200/test/test/_search?q=about:climbing&sort=age:desc
    {
    "took": 10,
    "timed_out": false,
    "_shards": {
    "total": 5,
    "successful": 5,
    "skipped": 0,
    "failed": 0
    },
    "hits": {
    "total": 3,
    "max_score": null,
    "hits": [
    {
    "_index": "test",
    "_type": "test",
    "_id": "1",
    "_score": null,
    "_source": {
    "first_name": "John",
    "last_name": "Smith",
    "age": 25,
    "about": "I love to go rock climbing",
    "interests": [
    "sports",
    "music"
    ]
    },
    "sort": [ #排序字段的值
    25
    ]
    },
    {
    "_index": "test",
    "_type": "test",
    "_id": "2",
    "_score": null,
    "_source": {
    "first_name": "小翠",
    "last_name": "cuicui",
    "age": 18,
    "about": "I love to go rock climbing",
    "interests": [
    "sports",
    "music"
    ]
    },
    "sort": [
    18
    ]
    },
    {
    "_index": "test",
    "_type": "test",
    "_id": "AWrVpGsO0WDJvaOeQOjd",
    "_score": null,
    "_source": {
    "first_name": "小翠",
    "last_name": "cui",
    "age": 18,
    "about": "I love to go rock climbing",
    "interests": [
    "sports",
    "music"
    ]
    },
    "sort": [
    18
    ]
    }
    ]
    }
    }
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    2.query DSL
    2.1.搜索全部
    // 1.
    POST http://ip:9200/test/test/_search
    语法:
    {
    "query":{
    "match_all":{}
    }
    }
    结果:
    {
    "took": 5,
    "timed_out": false,
    "_shards": {
    "total": 5,
    "successful": 5,
    "skipped": 0,
    "failed": 0
    },
    "hits": {
    "total": 5,
    "max_score": 1,
    "hits": [
    {
    "_index": "test",
    "_type": "test",
    "_id": "2",
    "_score": 1,
    "_source": {
    "first_name": "小翠",
    "last_name": "cuicui",
    "age": 18,
    "about": "I love to go rock climbing",
    "interests": [
    "sports",
    "music"
    ]
    }
    },
    {
    "_index": "test",
    "_type": "test",
    "_id": "4",
    "_score": 1,
    "_source": {
    "first_name": "小翠",
    "last_name": "cui",
    "age": 18,
    "price": 15000,
    "about": "I love to go rock climbing",
    "interests": [
    "sports",
    "music"
    ]
    }
    },
    {
    "_index": "test",
    "_type": "test",
    "_id": "1",
    "_score": 1,
    "_source": {
    "first_name": "John",
    "last_name": "Smith",
    "age": 25,
    "about": "I love to go rock climbing",
    "interests": [
    "sports",
    "music"
    ]
    }
    },
    {
    "_index": "test",
    "_type": "test",
    "_id": "AWrVpGsO0WDJvaOeQOjd",
    "_score": 1,
    "_source": {
    "first_name": "小翠",
    "last_name": "cui",
    "age": 18,
    "about": "I love to go rock climbing",
    "interests": [
    "sports",
    "music"
    ]
    }
    },
    {
    "_index": "test",
    "_type": "test",
    "_id": "3",
    "_score": 1,
    "_source": {
    "first_name": "小雪",
    "last_name": "xiaoxue",
    "age": 20,
    "about": "climbing",
    "interests": [
    "dancing",
    "music"
    ]
    }
    }
    ]
    }
    }
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    2.2.以about字段中含有climbing字符查询并根据age字段降序排列 可以多个排序,用逗号分隔
    // 1.
    POST http://ip:9200/test/test/_search
    语法:
    {
    "query":{
    "match":{
    "about":"climbing"
    }
    },
    "sort":[
    {
    "age":"desc"
    }
    ]
    }

    结果:
    {
    "took": 115,
    "timed_out": false,
    "_shards": {
    "total": 5,
    "successful": 5,
    "skipped": 0,
    "failed": 0
    },
    "hits": {
    "total": 5,
    "max_score": null,
    "hits": [
    {
    "_index": "test",
    "_type": "test",
    "_id": "1",
    "_score": null,
    "_source": {
    "first_name": "John",
    "last_name": "Smith",
    "age": 25,
    "about": "I love to go rock climbing",
    "interests": [
    "sports",
    "music"
    ]
    },
    "sort": [
    25
    ]
    },
    {
    "_index": "test",
    "_type": "test",
    "_id": "3",
    "_score": null,
    "_source": {
    "first_name": "小雪",
    "last_name": "xiaoxue",
    "age": 20,
    "about": "climbing",
    "interests": [
    "dancing",
    "music"
    ]
    },
    "sort": [
    20
    ]
    },
    {
    "_index": "test",
    "_type": "test",
    "_id": "2",
    "_score": null,
    "_source": {
    "first_name": "小翠",
    "last_name": "cuicui",
    "age": 18,
    "about": "I love to go rock climbing",
    "interests": [
    "sports",
    "music"
    ]
    },
    "sort": [
    18
    ]
    },
    {
    "_index": "test",
    "_type": "test",
    "_id": "4",
    "_score": null,
    "_source": {
    "first_name": "小翠",
    "last_name": "cui",
    "age": 18,
    "price": 15000,
    "about": "I love to go rock climbing",
    "interests": [
    "sports",
    "music"
    ]
    },
    "sort": [
    18
    ]
    },
    {
    "_index": "test",
    "_type": "test",
    "_id": "AWrVpGsO0WDJvaOeQOjd",
    "_score": null,
    "_source": {
    "first_name": "小翠",
    "last_name": "cui",
    "age": 18,
    "about": "I love to go rock climbing",
    "interests": [
    "sports",
    "music"
    ]
    },
    "sort": [
    18
    ]
    }
    ]
    }
    }
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    2.3. 分页数据
    // 1.
    POST http://ip:9200/test/test/_search
    语法:
    {
    "query":{
    "match_all":{} # 查询所有
    },
    "from":0, # 从第几条数据开始 0:第一条
    "size":1 # 展示几条数据
    }
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    2.4.只展示指定的filed
    // 1.
    POST http://ip:9200/test/test/_search
    语法:
    {
    "query":{
    "match_all":{}
    },
    "_source":[
    "first_name",
    "age"
    ]
    }

    结果:
    {
    "took": 8,
    "timed_out": false,
    "_shards": {
    "total": 5,
    "successful": 5,
    "skipped": 0,
    "failed": 0
    },
    "hits": {
    "total": 5,
    "max_score": 1,
    "hits": [
    {
    "_index": "test",
    "_type": "test",
    "_id": "3",
    "_score": 1,
    "_source": {
    "first_name": "小雪",
    "age": 20
    }
    }
    ]
    }
    }
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    3.query filter
    3.1.多个查询条件:about字段必须包含"climbing";age大于20岁
    // 1.
    POST http://ip:9200/test/test/_search
    语法:
    {
    "query":{
    "bool":{
    "must":{
    "match":{
    "about":"climbing"
    }
    },
    "filter":{
    "range":{
    "age":{
    "gt":20
    }
    }
    }
    }
    }
    }

    结果
    {
    "took": 7,
    "timed_out": false,
    "_shards": {
    "total": 5,
    "successful": 5,
    "skipped": 0,
    "failed": 0
    },
    "hits": {
    "total": 1,
    "max_score": 0.26742277,
    "hits": [
    {
    "_index": "test",
    "_type": "test",
    "_id": "1",
    "_score": 0.26742277,
    "_source": {
    "first_name": "John",
    "last_name": "Smith",
    "age": 25,
    "about": "I love to go rock climbing",
    "interests": [
    "sports",
    "music"
    ]
    }
    }
    ]
    }
    }
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    3.2. 多个查询条件:must、 should、 must_not
    POST http://47.99.74.228:9200/test/test/_search
    {
    "query":{
    "bool":{
    "must":{ # 必须匹配
    "match":{
    "first_name":"小翠"
    }
    },
    "should":{ # 可以匹配,也可以不匹配
    "match":{
    "last_name": "xue"
    }
    },
    "must_not":{ # 必须不匹配
    "match":{
    "last_name": "cui"
    }
    }
    }
    }
    }
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    4.full-test search
    4.1.全文检索
    // 1.
    POST http://ip:9200/test/test/_search
    语法:
    {
    "query":{
    "match":{
    "about":"go climbing"
    }
    }
    }
    分析:es将about这个filed拆解成每个词(term),建立倒排索引,每个term对应相应的document_id
    结果:
    {
    "took": 8,
    "timed_out": false,
    "_shards": {
    "total": 5,
    "successful": 5,
    "skipped": 0,
    "failed": 0
    },
    "hits": {
    "total": 7,
    "max_score": 0.7447149,
    "hits": [
    {
    "_index": "test",
    "_type": "test",
    "_id": "2",
    "_score": 0.7447149,
    "_source": {
    "first_name": "小翠",
    "last_name": "cuicui",
    "age": 18,
    "about": "I love to go rock climbing",
    "interests": [
    "sports",
    "music"
    ]
    }
    },
    {
    "_index": "test",
    "_type": "test",
    "_id": "4",
    "_score": 0.7447149,
    "_source": {
    "first_name": "小翠",
    "last_name": "cui",
    "age": 18,
    "price": 15000,
    "about": "I love to go rock climbing",
    "interests": [
    "sports",
    "music"
    ]
    }
    },
    {
    "_index": "test",
    "_type": "test",
    "_id": "1",
    "_score": 0.61562645,
    "_source": {
    "first_name": "John",
    "last_name": "Smith",
    "age": 25,
    "about": "I love to go rock climbing",
    "interests": [
    "sports",
    "music"
    ]
    }
    },
    {
    "_index": "test",
    "_type": "test",
    "_id": "AWrVpGsO0WDJvaOeQOjd",
    "_score": 0.61562645,
    "_source": {
    "first_name": "小翠",
    "last_name": "cui",
    "age": 18,
    "about": "I love to go rock climbing",
    "interests": [
    "sports",
    "music"
    ]
    }
    },
    {
    "_index": "test",
    "_type": "test",
    "_id": "5",
    "_score": 0.2876821,
    "_source": {
    "first_name": "花花",
    "last_name": "huahau",
    "age": 16,
    "price": 20000,
    "about": "climbing",
    "interests": [
    "sports",
    "music"
    ]
    }
    },
    {
    "_index": "test",
    "_type": "test",
    "_id": "7",
    "_score": 0.25759193,
    "_source": {
    "about": "go"
    }
    },
    {
    "_index": "test",
    "_type": "test",
    "_id": "3",
    "_score": 0.25759193,
    "_source": {
    "first_name": "小雪",
    "last_name": "xiaoxue",
    "age": 20,
    "about": "climbing",
    "interests": [
    "dancing",
    "music"
    ]
    }
    }
    ]
    }
    }
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    4.2.短语搜索:匹配短语
    // 1.
    POST http://ip:9200/test/test/_search
    语法:
    {
    "query":{
    "match_phrase":{
    "about":"rock climbing"
    }
    }
    }

    结果:
    {
    "took": 20,
    "timed_out": false,
    "_shards": {
    "total": 5,
    "successful": 5,
    "skipped": 0,
    "failed": 0
    },
    "hits": {
    "total": 4,
    "max_score": 0.9748371,
    "hits": [
    {
    "_index": "test",
    "_type": "test",
    "_id": "1",
    "_score": 0.9748371,
    "_source": {
    "first_name": "John",
    "last_name": "Smith",
    "age": 25,
    "about": "I love to go rock climbing",
    "interests": [
    "sports",
    "music"
    ]
    }
    },
    {
    "_index": "test",
    "_type": "test",
    "_id": "2",
    "_score": 0.7447149,
    "_source": {
    "first_name": "小翠",
    "last_name": "cuicui",
    "age": 18,
    "about": "I love to go rock climbing",
    "interests": [
    "sports",
    "music"
    ]
    }
    },
    {
    "_index": "test",
    "_type": "test",
    "_id": "4",
    "_score": 0.7447149,
    "_source": {
    "first_name": "小翠",
    "last_name": "cui",
    "age": 18,
    "price": 15000,
    "about": "I love to go rock climbing",
    "interests": [
    "sports",
    "music"
    ]
    }
    },
    {
    "_index": "test",
    "_type": "test",
    "_id": "AWrVpGsO0WDJvaOeQOjd",
    "_score": 0.6156264,
    "_source": {
    "first_name": "小翠",
    "last_name": "cui",
    "age": 18,
    "about": "I love to go rock climbing",
    "interests": [
    "sports",
    "music"
    ]
    }
    }
    ]
    }
    }
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    5.highlight search
    5.1.关键字高亮
    // 1.
    语法:
    {
    "query":{
    "match":{
    "about":"climbing" # 关键字
    }
    },
    "highlight":{
    "fields":{
    "about":{http://www.my516.com} # 字段
    }
    }
    }

    结果:
    {
    "took": 7,
    "timed_out": false,
    "_shards": {
    "total": 5,
    "successful": 5,
    "skipped": 0,
    "failed": 0
    },
    "hits": {
    "total": 6,
    "max_score": 0.48741856,
    "hits": [
    {
    "_index": "test",
    "_type": "test",
    "_id": "1",
    "_score": 0.48741856,
    "_source": {
    "first_name": "John",
    "last_name": "Smith",
    "age": 25,
    "about": "I love to go rock climbing",
    "interests": [
    "sports",
    "music"
    ]
    },
    "highlight": {
    "about": [
    "I love to go rock <em>climbing</em>" # <em> 标签html中高亮显示
    ]
    }
    },
    {
    "_index": "test",
    "_type": "test",
    "_id": "2",
    "_score": 0.37235746,
    "_source": {
    "first_name": "小翠",
    "last_name": "cuicui",
    "age": 18,
    "about": "I love to go rock climbing",
    "interests": [
    "sports",
    "music"
    ]
    },
    "highlight": {
    "about": [
    "I love to go rock <em>climbing</em>"
    ]
    }
    },
    {
    "_index": "test",
    "_type": "test",
    "_id": "4",
    "_score": 0.37235746,
    "_source": {
    "first_name": "小翠",
    "last_name": "cui",
    "age": 18,
    "price": 15000,
    "about": "I love to go rock climbing",
    "interests": [
    "sports",
    "music"
    ]
    },
    "highlight": {
    "about": [
    "I love to go rock <em>climbing</em>"
    ]
    }
    },
    {
    "_index": "test",
    "_type": "test",
    "_id": "5",
    "_score": 0.2876821,
    "_source": {
    "first_name": "花花",
    "last_name": "huahau",
    "age": 16,
    "price": 20000,
    "about": "climbing",
    "interests": [
    "sports",
    "music"
    ]
    },
    "highlight": {
    "about": [
    "<em>climbing</em>"
    ]
    }
    },
    {
    "_index": "test",
    "_type": "test",
    "_id": "3",
    "_score": 0.25759193,
    "_source": {
    "first_name": "小雪",
    "last_name": "xiaoxue",
    "age": 20,
    "about": "climbing",
    "interests": [
    "dancing",
    "music"
    ]
    },
    "highlight": {
    "about": [
    "<em>climbing</em>"
    ]
    }
    },
    {
    "_index": "test",
    "_type": "test",
    "_id": "AWrVpGsO0WDJvaOeQOjd",
    "_score": 0.12820786,
    "_source": {
    "first_name": "小翠",
    "last_name": "cui",
    "age": 18,
    "about": "I love to go rock climbing",
    "interests": [
    "sports",
    "music"
    ]
    },
    "highlight": {
    "about": [
    "I love to go rock <em>climbing</em>"
    ]
    }
    }
    ]
    }
    }
    --------------------- 

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  • 原文地址:https://www.cnblogs.com/hyhy904/p/10992425.html
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