Elasticsearch---DSL搜索实践

时间 2021-02-23

标签 javascript 前端 java app ide post 性能学习 url spa 栏目日志分析繁體版

原文原文链接

 
  Domain Specific Language 
 

 
  特定领域语言，基于JSON格式的数据查询，查询更灵活，有利于复杂查询 
 

 
 1、普通url路径参数搜索 

数据准备

  1.创建名字为 shop 的索引 

  2.手动创建mappings 

 
   POST        http://192.168.2.223:9200/shop/_mapping
{
    "properties": {
        "id": {
            "type": "long"
        },
        "age": {
            "type": "integer"
        },
        "username": {
            "type": "keyword"
        },
        "nickname": {
            "type": "text",
            "analyzer": "ik_max_word"
        },
        "money": {
            "type": "float"
        },
        "desc": {
            "type": "text",
            "analyzer": "ik_max_word"
        },
        "sex": {
            "type": "byte"
        },
        "birthday": {
            "type": "date"
        },
        "face": {
            "type": "text",
            "index": false
        }
    }
} 
  
View Code

   3.添加数据 
 
 
    POST   http://192.168.2.223:9200/shop/_doc/1001
{
"id": 1011,
"age": 31,
"username": "sprder",
"nickname": "皮特帕克",
"money": 180.8,
"desc": "它是一个超级英雄",
"sex": 1,
"birthday": "1989-08-14",
"face": "https://www.zhouhong.com/static/img/index/logo.png"
}
{
"id": 1008,
"age": 19,
"username": "zhoujiang",
"nickname": "周江",
"money": 1056.8,
"desc": "周江大学毕业后，进了阿里",
"sex": 1,
"birthday": "1995-06-14",
"face": "https://www.zhouhong.com/static/img/index/logo.png"
}
{
"id": 1007,
"age": 19,
"username": "msgame",
"nickname": "gamexbox",
"money": 1056.8,
"desc": "明天去进货，最近微软处理不少游戏机，还要买xbox游戏卡带",
"sex": 1,
"birthday": "1985-05-14",
"face": "https://www.zhouhong.com/static/img/index/logo.png"    
}
{
"id": 1003,
"age": 20,
"username": "bigFace",
"nickname": "飞翔的巨鹰",
"money": 66.8,
"desc": "周江和导游坐飞机去海外旅游，去了新马泰和欧洲",
"sex": 1,
"birthday": "1996-01-14",
"face": "https://www.zhouhong.com/static/img/index/logo.png"    
}
{
"id": 1002,
"age": 19,
"username": "zhouhong",
"nickname": "周红",
"money": 77.8,
"desc": "今天上下班都很堵，车流量很大",
"sex": 1,
"birthday": "1993-01-24",
"face": "https://www.zhouhong.com/static/img/index/logo.png"    
}
{
 "id": 1012,
"age": 31,
"username": "super hero",
"nickname": "super hero",
"money": 188.8,
"desc": "BatMan, GreenArrow, SpiderMan, IronMan... are all Super Hero",
"sex": 1,
"birthday": "1980-08-14",
"face": "https://www.zhouhong.com/static/img/index/logo.png"   
}
{
"id": 1010,
"age": 30,
"username": "tata",
"nickname": "隔壁老王",
"money": 100.8,
"desc": "隔壁老外去国外出差，带给我不少好吃的",
"sex": 1,
"birthday": "1988-07-14",
"face": "https://www.zhouhong.com/static/img/index/logo.png"    
}
{
 "id": 1009,
"age": 22,
"username": "shaonian",
"nickname": "骚年轮",
"money": 96.8,
"desc": "骚年在大学毕业后，考研究生去了",
"sex": 1,
"birthday": "1998-07-14",
"face": "https://www.zhouhong.com/static/img/index/logo.png"   
}
{
"id": 1006,
"age": 19,
"username": "zhouhong",
"nickname": "我叫周红",
"money": 156.8,
"desc": "我叫周红，今年20岁，是一名毕业生，我在琦䯲星球作演讲",
"sex": 1,
"birthday": "1993-04-14",
"face": "https://www.zhouhong.com/static/img/index/logo.png"    
}
{
"id": 1005,
"age": 25,
"username": "gotoplay",
"nickname": "ps游戏机",
"money": 155.8,
"desc": "今年生日，女朋友送了我一台play station游戏机，很是好玩，很是不错",
"sex": 1,
"birthday": "1989-03-14",
"face": "https://www.zhouhong.com/static/img/index/logo.png"    
}
{
 "id": 1004,
"age": 22,
"username": "flyfish",
"nickname": "水中鱼",
"money": 55.8,
"desc": "昨天周红在学校的池塘里，看到有不少鱼在游泳",
"sex": 0,
"birthday": "1988-02-14",
"face": "https://www.zhouhong.com/static/img/index/logo.png"   
}
{
 "id": 1001,
"age": 18,
"username": "zhoujiang",
"nickname": "周江",
"money": 88.8,
"desc": "周江在大学学习java和前端",
"sex": 0,
"birthday": "1992-12-24",
"face": "https://www.zhouhong.com/static/img/index/logo.png"   
} 
   
View Code
 
   2、检索： 
  
 
   普通检索： 
  
 
   http://192.168.2.223:9200/shop/_search?q=desc:周红&q=age:20
 
       {
    "took": 8,
    "timed_out": false,
    "_shards": {
        "total": 3,
        "successful": 3,
        "skipped": 0,
        "failed": 0
    },
    "hits": {
        "total": {
            "value": 1,
            "relation": "eq"
        },
        "max_score": 1,
        "hits": [
            {
                "_index": "shop",
                "_type": "_doc",
                "_id": "1003",
                "_score": 1,
                "_source": {
                    "id": 1003,
                    "age": 20,
                    "username": "bigFace",
                    "nickname": "飞翔的巨鹰",
                    "money": 66.8,
                    "desc": "周江和导游坐飞机去海外旅游，去了新马泰和欧洲",
                    "sex": 1,
                    "birthday": "1996-01-14",
                    "face": "https://www.zhouhong.com/static/img/index/logo.png"
                }
            }
        ]
    }
} 
      
View Code
 
  
 
   DSL检索： 
  
 
   match_all 检索
查询全部：POST http://192.168.2.223:9200/shop/_doc/_search
 
       {
    "query": {
        "match_all": {}
    }
} 
      

          
      
查询部分字段 ： POST http://192.168.2.223:9200/shop/_doc/_search
 
       {
    "query": {
        "match_all": {}
    },
    "_source": ["id","username","age"]
} 
      
分页查询： POST http://192.168.2.223:9200/shop/_doc/_search
 
       {
    "query": {
        "match_all": {}
    },
    "_source": ["id","username","age"],
    "from": 0,
    "size": 5
} 
      
 
  
match_phrase 查询同一个字段中几个词，能够跳过其余词，slop表示能够跳过的最大词数
POST http://192.168.2.223:9200/shop/_doc/_search
 
       {
    "query": {
        "match_phrase": {
            "desc": {
                "query": "今天 车流量",
                "slop": 100
            }
        }
    }
} 
      
 
    term 单个条件查询（不会进行分词、将输入字符当作关键字查找，精确匹配）
POST http://192.168.2.223:9200/shop/_doc/_search
 
        {
    "query": {
        "term": {
            "desc": "学习"
        }
    }
} 
       
 
   
 
    terms 对个关键字查询 
      　　POST http://192.168.2.223:9200/shop/_doc/_search
 
         {
    "query": {
        "terms": {
            "desc": ["学习","周红","周江"]
        }
    }
} 
        
 
 
   
 
    match 条件查询（会对输入的字符进行分词操做、全文检索）：
POST http://192.168.2.223:9200/shop/_doc/_search
 
        {
    "query": {
        "match": {
            "desc": "周红"
        }
    },
    "_source": ["id","username","age"]
} 
       
 
   
 
     
     POST http://192.168.2.223:9200/shop/_doc/_search operator 为 “or”表示：字段只要有一个分词就能够查出来，operator 为 “and”表示：字段必须包含分词分出来的全部字段。
 
        {
    "query": {
        "match": {
            "desc": {
                "query": "周红",
                "operator": "and"
            }
        }
    },
    "_source": ["id","username","age"]
} 
       
 
     
   
 
    
    POST http://192.168.2.223:9200/shop/_doc/_search 
​minimum_should_match: 最低匹配精度，至少有[分词后的词语个数]x百分百，得出一个数据值取整。举个例子：当前属性设置为70，若一个用户查询检索内容分词后有10个词语，那么匹配度按照 10x70%=7，则desc中至少须要有7个词语匹配，就展现；若分词后有8个，则 8x70%=5.6，则desc中至少须要有5个词语匹配，就展现。
minimum_should_match 也能设置具体的数字，表示拆分出来的词在一个字段中个数
 
       {
    "query": {
        "match": {
            "desc": {
                "query": "女朋友生日送我好玩的xbox游戏机",
                "minimum_should_match": "60%"
            }
        }
    }
}  
      
 
    
  
 
    
    POST http://192.168.2.223:9200/shop/_doc/_search 根据文档 ids 进行查找
 
       {
    "query": {
        "ids": {
            "type": "_doc",
            "values": ["1001","1005","1006"]
        }
    },
    "_source": ["id","username","desc"]
} 
      
 
    
  
 
   multi_match 对多个字段进行检索
POST http://192.168.2.223:9200/shop/_doc/_search ^10 表示权重，权重，为某个字段设置权重，权重越高，文档相关性得分就越高。通畅来讲搜索商品名称要比商品简介的权重更高。
 
       {
    "query": {
        "multi_match": {
            "query": "游戏",
            "fields": [
                "desc^10","nickname"
            ]
        }
    }
} 
      
 
  
 
   bool 查询
POST http://192.168.2.223:9200/shop/_doc/_search
must ：多个条件所有要知足， should：或者的意思，知足一个条件便可，must_not ：除了知足全部条件剩下的数据。
 
       {
    "query": {
        "bool": {
            "must": [
                {
                    "multi_match": {
                        "query": "游戏",
                        "fields": ["desc","nickname"]
                    }
                },
                {
                    "term": {
                        "age": "19"
                    }
                }
            ]
        }
    }
} 
      
 
  
 
   post_filter 过滤器
POST http://192.168.2.223:9200/shop/_doc/_search
对搜索出来的结果进行数据过滤。不会到es库里去搜，不会去计算文档的相关度分数，因此过滤的性能会比较高，过滤器能够和全文搜索结合在一块儿使用。
 
  
 
   post_filter元素是一个顶层元素，只会对搜索结果进行过滤。不会计算数据的匹配度相关性分数，不会根据分数去排序，query则相反，会计算分数，也会按照分数去排序。 
  
 
   使用场景： 
  
 
   ​query：根据用户搜索条件检索匹配记录
post_filter：用于查询后，对结果数据的筛选
 
  
 
   实操：查询帐户金额大于80元，小于等于155.8元的用户 
  
 
   gte：大于等于 
  
 
   lte：小于等于 
  
 
   gt：大于 
  
 
   lt：小于 
  
 
    {
    "query": {
        "match": {
            "sex": "1"
        }
    },
    "post_filter": {
        "range": {
            "money": {
                "gte": 60,
                "lte": 155.8
            }
        }
    }
} 
   
 
   sort 排序功能
POST http://192.168.2.223:9200/shop/_doc/_search 先以money排序再以age排序，注意：只能对整形排序，不能对文本类型排序。
 
       {
    "query": {
        "match": {
            "sex": "1"
        }
    },
    "sort": [
        {
            "money": "asc"
        },
        {
            "age": "asc"
        }    
    ]
} 
      
 
  
 
    
    对文本排序
须要对排序字段加一个附加属性，类型选择为keyword
 
        1.建立索引
POST        /shop2/_mapping
{
    "properties": {
        "id": {
            "type": "long"
        },
        "nickname": {
            "type": "text",
            "analyzer": "ik_max_word",
            "fields": {
                "keyword": {
                    "type": "keyword"
                }
            }
        }
    }
} 
       
View Code
 
        2.插入数据
POST         /shop2/_doc
{
    "id": 1001,
    "nickname": "美丽的风景"
}
{
    "id": 1002,
    "nickname": "漂亮的小哥哥"
}
{
    "id": 1003,
    "nickname": "飞翔的巨鹰"
}
{
    "id": 1004,
    "nickname": "完美的天空"
}
{
    "id": 1005,
    "nickname": "广阔的海域"
} 
       
View Code
 
       3.排序     POST    http://192.168.2.223:9200/shop2/_doc/_search
{
    "sort": [
        {
            "nickname.keyword": "desc"
        }
    ]
} 
      
 
    
  
 
   exists 判断字段是否存在
POST http://192.168.2.223:9200/shop/_doc/_search
 
       {
    "query": {
        "exists": {
            "field": "desc"
        }
    }
} 
      
 
  
highlight 关键字高亮显示
POST http://192.168.2.223:9200/shop/_doc/_search
 
       {
    "query": {
        "match": {
            "desc": "周红"
        }
    },
    "highlight": {
        "pre_tags": ["<span>"],
        "post_tags": ["</span>"],
        "fields": {
            "desc": {}
        }
    }
} 
      
 
       结果：默认为em标签，上面设置为自定义的<span>标签，对页面 em/span 标签作一个颜色设置就能够实现高亮显示了。 
      
 
        {
    "took": 110,
    "timed_out": false,
    "_shards": {
        "total": 3,
        "successful": 3,
        "skipped": 0,
        "failed": 0
    },
    "hits": {
        "total": {
            "value": 2,
            "relation": "eq"
        },
        "max_score": 1.1329247,
        "hits": [
            {
                "_index": "shop",
                "_type": "_doc",
                "_id": "1004",
                "_score": 1.1329247,
                "_source": {
                    "id": 1004,
                    "age": 22,
                    "username": "flyfish",
                    "nickname": "水中鱼",
                    "money": 55.8,
                    "desc": "昨天周红在学校的池塘里，看到有不少鱼在游泳",
                    "sex": 0,
                    "birthday": "1988-02-14",
                    "face": "https://www.zhouhong.com/static/img/index/logo.png"
                },
                "highlight": {
                    "desc": [
                        "昨天<em>周红</em>在学校的池塘里，看到有不少鱼在游泳"
                    ]
                }
            },
            {
                "_index": "shop",
                "_type": "_doc",
                "_id": "1006",
                "_score": 0.9585575,
                "_source": {
                    "id": 1006,
                    "age": 19,
                    "username": "zhouhong",
                    "nickname": "我叫周红",
                    "money": 156.8,
                    "desc": "我叫周红，今年20岁，是一名毕业生，我在琦䯲星球作演讲",
                    "sex": 1,
                    "birthday": "1993-04-14",
                    "face": "https://www.zhouhong.com/static/img/index/logo.png"
                },
                "highlight": {
                    "desc": [
                        "我叫<em>周红</em>，今年20岁，是一名毕业生，我在琦䯲星球作演讲"
                    ]
                }
            }
        ]
    } 
       
View Code
 
 

 
  Domain Specific Language 
 

 
  特定领域语言，基于JSON格式的数据查询，查询更灵活，有利于复杂查询 
 

 
 1、普通url路径参数搜索 

数据准备

  1.创建名字为 shop 的索引 

  2.手动创建mappings 

  POST http://192.168.2.223:9200/shop/_mapping { "properties": { "id": { "type": "long" }, "age": { "type": "integer" }, "username": { "type": "keyword" }, "nickname": { "type": "text", "analyzer": "ik_max_word" }, "money": { "type": "float" }, "desc": { "type": "text", "analyzer": "ik_max_word" }, "sex": { "type": "byte" }, "birthday": { "type": "date" }, "face": { "type": "text", "index": false } } } 

  3.添加数据 

  POST http://192.168.2.223:9200/shop/_doc/1001 { "id": 1011, "age": 31, "username": "sprder", "nickname": "皮特帕克", "money": 180.8, "desc": "它是一个超级英雄", "sex": 1, "birthday": "1989-08-14", "face": "https://www.zhouhong.com/static/img/index/logo.png" } { "id": 1008, "age": 19, "username": "zhoujiang", "nickname": "周江", "money": 1056.8, "desc": "周江大学毕业后，进了阿里", "sex": 1, "birthday": "1995-06-14", "face": "https://www.zhouhong.com/static/img/index/logo.png" } { "id": 1007, "age": 19, "username": "msgame", "nickname": "gamexbox", "money": 1056.8, "desc": "明天去进货，最近微软处理不少游戏机，还要买xbox游戏卡带", "sex": 1, "birthday": "1985-05-14", "face": "https://www.zhouhong.com/static/img/index/logo.png" } { "id": 1003, "age": 20, "username": "bigFace", "nickname": "飞翔的巨鹰", "money": 66.8, "desc": "周江和导游坐飞机去海外旅游，去了新马泰和欧洲", "sex": 1, "birthday": "1996-01-14", "face": "https://www.zhouhong.com/static/img/index/logo.png" } { "id": 1002, "age": 19, "username": "zhouhong", "nickname": "周红", "money": 77.8, "desc": "今天上下班都很堵，车流量很大", "sex": 1, "birthday": "1993-01-24", "face": "https://www.zhouhong.com/static/img/index/logo.png" } { "id": 1012, "age": 31, "username": "super hero", "nickname": "super hero", "money": 188.8, "desc": "BatMan, GreenArrow, SpiderMan, IronMan... are all Super Hero", "sex": 1, "birthday": "1980-08-14", "face": "https://www.zhouhong.com/static/img/index/logo.png" } { "id": 1010, "age": 30, "username": "tata", "nickname": "隔壁老王", "money": 100.8, "desc": "隔壁老外去国外出差，带给我不少好吃的", "sex": 1, "birthday": "1988-07-14", "face": "https://www.zhouhong.com/static/img/index/logo.png" } { "id": 1009, "age": 22, "username": "shaonian", "nickname": "骚年轮", "money": 96.8, "desc": "骚年在大学毕业后，考研究生去了", "sex": 1, "birthday": "1998-07-14", "face": "https://www.zhouhong.com/static/img/index/logo.png" } { "id": 1006, "age": 19, "username": "zhouhong", "nickname": "我叫周红", "money": 156.8, "desc": "我叫周红，今年20岁，是一名毕业生，我在琦䯲星球作演讲", "sex": 1, "birthday": "1993-04-14", "face": "https://www.zhouhong.com/static/img/index/logo.png" } { "id": 1005, "age": 25, "username": "gotoplay", "nickname": "ps游戏机", "money": 155.8, "desc": "今年生日，女朋友送了我一台play station游戏机，很是好玩，很是不错", "sex": 1, "birthday": "1989-03-14", "face": "https://www.zhouhong.com/static/img/index/logo.png" } { "id": 1004, "age": 22, "username": "flyfish", "nickname": "水中鱼", "money": 55.8, "desc": "昨天周红在学校的池塘里，看到有不少鱼在游泳", "sex": 0, "birthday": "1988-02-14", "face": "https://www.zhouhong.com/static/img/index/logo.png" } { "id": 1001, "age": 18, "username": "zhoujiang", "nickname": "周江", "money": 88.8, "desc": "周江在大学学习java和前端", "sex": 0, "birthday": "1992-12-24", "face": "https://www.zhouhong.com/static/img/index/logo.png" } 

 
 2、检索： 

http://192.168.2.223:9200/shop/_search?q=desc:周红&q=age:20

  { "took": 8, "timed_out": false, "_shards": { "total": 3, "successful": 3, "skipped": 0, "failed": 0 }, "hits": { "total": { "value": 1, "relation": "eq" }, "max_score": 1, "hits": [ { "_index": "shop", "_type": "_doc", "_id": "1003", "_score": 1, "_source": { "id": 1003, "age": 20, "username": "bigFace", "nickname": "飞翔的巨鹰", "money": 66.8, "desc": "周江和导游坐飞机去海外旅游，去了新马泰和欧洲", "sex": 1, "birthday": "1996-01-14", "face": "https://www.zhouhong.com/static/img/index/logo.png" } } ] } } 

 
 2、DSL搜索 

match_all 检索

查询全部：POST http://192.168.2.223:9200/shop/_doc/_search

  { "query": { "match_all": {} } } 

查询部分字段： POST http://192.168.2.223:9200/shop/_doc/_search

  { "query": { "match_all": {} }, "_source": ["id","username","age"] } 

分页查询： POST http://192.168.2.223:9200/shop/_doc/_search

  { "query": { "match_all": {} }, "_source": ["id","username","age"], "from": 0, "size": 5 } 

match_phrase 查询同一个字段中几个词，能够跳过其余词，slop表示能够跳过的最大词数

POST http://192.168.2.223:9200/shop/_doc/_search

  { "query": { "match_phrase": { "desc": { "query": "今天 车流量", "slop": 100 } } } } 

term 单个条件查询（不会进行分词、将输入字符当作关键字查找，精确匹配）

POST http://192.168.2.223:9200/shop/_doc/_search

  { "query": { "term": { "desc": "学习" } } } 

terms 对个关键字查询

  { "query": { "terms": { "desc": ["学习","周红","周江"] } } } 

match 条件查询（会对输入的字符进行分词操做、全文检索）：

POST http://192.168.2.223:9200/shop/_doc/_search

  { "query": { "match": { "desc": "周红" } }, "_source": ["id","username","age"] } 

POST http://192.168.2.223:9200/shop/_doc/_search operator 为 “or”表示：字段只要有一个分词就能够查出来，operator 为 “and”表示：字段必须包含分词分出来的全部字段。

  { "query": { "match": { "desc": { "query": "周红", "operator": "and" } } }, "_source": ["id","username","age"] } 

POST http://192.168.2.223:9200/shop/_doc/_search
minimum_should_match: 最低匹配精度，至少有[分词后的词语个数]x百分百，得出一个数据值取整。举个例子：当前属性设置为70，若一个用户查询检索内容分词后有10个词语，那么匹配度按照 10x70%=7，则desc中至少须要有7个词语匹配，就展现；若分词后有8个，则 8x70%=5.6，则desc中至少须要有5个词语匹配，就展现。
minimum_should_match 也能设置具体的数字，表示拆分出来的词在一个字段中个数

  { "query": { "match": { "desc": { "query": "女朋友生日送我好玩的xbox游戏机", "minimum_should_match": "60%" } } } } 

POST http://192.168.2.223:9200/shop/_doc/_search 根据文档 ids 进行查找

  { "query": { "ids": { "type": "_doc", "values": ["1001","1005","1006"] } }, "_source": ["id","username","desc"] } 

multi_match 对多个字段进行检索

POST http://192.168.2.223:9200/shop/_doc/_search ^10 表示权重，权重，为某个字段设置权重，权重越高，文档相关性得分就越高。通畅来讲搜索商品名称要比商品简介的权重更高。

  { "query": { "multi_match": { "query": "游戏", "fields": [ "desc^10","nickname" ] } } } 

bool 查询

POST http://192.168.2.223:9200/shop/_doc/_search
must ：多个条件所有要知足， should：或者的意思，知足一个条件便可，must_not ：除了知足全部条件剩下的数据。

  { "query": { "bool": { "must": [ { "multi_match": { "query": "游戏", "fields": ["desc","nickname"] } }, { "term": { "age": "19" } } ] } } } 

post_filter 过滤器

POST http://192.168.2.223:9200/shop/_doc/_search
对搜索出来的结果进行数据过滤。不会到es库里去搜，不会去计算文档的相关度分数，因此过滤的性能会比较高，过滤器能够和全文搜索结合在一块儿使用。

 
 post_filter元素是一个顶层元素，只会对搜索结果进行过滤。不会计算数据的匹配度相关性分数，不会根据分数去排序，query则相反，会计算分数，也会按照分数去排序。 

 
 使用场景： 

query：根据用户搜索条件检索匹配记录
post_filter：用于查询后，对结果数据的筛选

 
 实操：查询帐户金额大于80元，小于等于155.8元的用户 

 
 gte：大于等于 

 
 lte：小于等于 

 
 gt：大于 

 
 lt：小于 

  { "query": { "match": { "sex": "1" } }, "post_filter": { "range": { "money": { "gte": 60, "lte": 155.8 } } } } 

sort 排序功能

POST http://192.168.2.223:9200/shop/_doc/_search 先以money排序再以age排序，注意：只能对整形排序，不能对文本类型排序。

  { "query": { "match": { "sex": "1" } }, "sort": [ { "money": "asc" }, { "age": "asc" } ] } 

对文本排序
须要对排序字段加一个附加属性，类型选择为keyword

  1.建立索引 POST /shop2/_mapping { "properties": { "id": { "type": "long" }, "nickname": { "type": "text", "analyzer": "ik_max_word", "fields": { "keyword": { "type": "keyword" } } } } } 

  2.插入数据 POST /shop2/_doc { "id": 1001, "nickname": "美丽的风景" } { "id": 1002, "nickname": "漂亮的小哥哥" } { "id": 1003, "nickname": "飞翔的巨鹰" } { "id": 1004, "nickname": "完美的天空" } { "id": 1005, "nickname": "广阔的海域" } 

  3.排序 POST http://192.168.2.223:9200/shop2/_doc/_search { "sort": [ { "nickname.keyword": "desc" } ] } 

exists 判断字段是否存在

POST http://192.168.2.223:9200/shop/_doc/_search

  { "query": { "exists": { "field": "desc" } } } 

highlight 关键字高亮显示

POST http://192.168.2.223:9200/shop/_doc/_search

  { "query": { "match": { "desc": "周红" } }, "highlight": { "pre_tags": ["<span>"], "post_tags": ["</span>"], "fields": { "desc": {} } } } 

 
 结果：默认为em标签，上面设置为自定义的<span>标签，对页面 em/span 标签作一个颜色设置就能够实现高亮显示了。 

  { "took": 110, "timed_out": false, "_shards": { "total": 3, "successful": 3, "skipped": 0, "failed": 0 }, "hits": { "total": { "value": 2, "relation": "eq" }, "max_score": 1.1329247, "hits": [ { "_index": "shop", "_type": "_doc", "_id": "1004", "_score": 1.1329247, "_source": { "id": 1004, "age": 22, "username": "flyfish", "nickname": "水中鱼", "money": 55.8, "desc": "昨天周红在学校的池塘里，看到有不少鱼在游泳", "sex": 0, "birthday": "1988-02-14", "face": "https://www.zhouhong.com/static/img/index/logo.png" }, "highlight": { "desc": [ "昨天<em>周红</em>在学校的池塘里，看到有不少鱼在游泳" ] } }, { "_index": "shop", "_type": "_doc", "_id": "1006", "_score": 0.9585575, "_source": { "id": 1006, "age": 19, "username": "zhouhong", "nickname": "我叫周红", "money": 156.8, "desc": "我叫周红，今年20岁，是一名毕业生，我在琦䯲星球作演讲", "sex": 1, "birthday": "1993-04-14", "face": "https://www.zhouhong.com/static/img/index/logo.png" }, "highlight": { "desc": [ "我叫<em>周红</em>，今年20岁，是一名毕业生，我在琦䯲星球作演讲" ] } } ] } } 