微服务框架 SpringCloud微服务架构 23 搜索结果处理 23.2 分页

news2024/11/16 7:53:14

微服务框架

【SpringCloud+RabbitMQ+Docker+Redis+搜索+分布式，系统详解springcloud微服务技术栈课程|黑马程序员Java微服务】

SpringCloud微服务架构

文章目录

- - 微服务框架
  - SpringCloud微服务架构
  - 23 搜索结果处理
  - - 23.2 分页
    - - 23.2.1 分页
      - 23.2.2 深度分页问题
      - 23.2.3 深度分页解决方案
      - 23.2.4 总结

23 搜索结果处理

23.2 分页

23.2.1 分页

elasticsearch 默认情况下只返回top10的数据。而如果要查询更多数据就需要修改分页参数了。

elasticsearch中通过修改from、size参数来控制要返回的分页结果：

之前默认查询所有文档，默认显示10条，就是因为ES 底层有一个默认的分页参数

【语法】

GET /hotel/_search
{
  "query": {
    "match_all": {}
  },
  "from": 990, // 分页开始的位置，默认为0
  "size": 10, // 期望获取的文档总数
  "sort": [
    {"price": "asc"}
  ]
}

在这里插入图片描述

试试

# 分页查询
GET /hotel/_search
{
  "query": {
    "match_all": {}
  },
  "sort": [
    {
      "price": "asc"
    }
  ],
  "from": 0,
  "size": 3
}

查询第一页，每页三条

运行结果

在这里插入图片描述

{
  "took" : 0,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 201,
      "relation" : "eq"
    },
    "max_score" : null,
    "hits" : [
      {
        "_index" : "hotel",
        "_type" : "_doc",
        "_id" : "197837109",
        "_score" : null,
        "_source" : {
          "address" : "布吉镇深惠路龙珠商城",
          "brand" : "如家",
          "business" : "布吉/深圳东站",
          "city" : "深圳",
          "id" : 197837109,
          "location" : "22.602482, 114.123284",
          "name" : "如家酒店·neo(深圳龙岗大道布吉地铁站店)",
          "pic" : "https://m.tuniucdn.com/fb2/t1/G6/M00/25/58/Cii-TF3PFZOIA7jwAAKInGFN4xgAAEVbAGeP4AAAoi0485_w200_h200_c1_t0.jpg",
          "price" : 127,
          "score" : 43,
          "starName" : "二钻"
        },
        "sort" : [
          127
        ]
      },
      {
        "_index" : "hotel",
        "_type" : "_doc",
        "_id" : "2316304",
        "_score" : null,
        "_source" : {
          "address" : "龙岗街道龙岗墟社区龙平东路62号",
          "brand" : "如家",
          "business" : "龙岗中心区/大运新城",
          "city" : "深圳",
          "id" : 2316304,
          "location" : "22.730828, 114.278337",
          "name" : "如家酒店(深圳双龙地铁站店)",
          "pic" : "https://m.tuniucdn.com/fb3/s1/2n9c/4AzEoQ44awd1D2g95a6XDtJf3dkw_w200_h200_c1_t0.jpg",
          "price" : 135,
          "score" : 45,
          "starName" : "二钻"
        },
        "sort" : [
          135
        ]
      },
      {
        "_index" : "hotel",
        "_type" : "_doc",
        "_id" : "1630005459",
        "_score" : null,
        "_source" : {
          "address" : "罗湖区宝安南路2078号深港豪苑（与红桂路交汇处）",
          "brand" : "7天酒店",
          "business" : "",
          "city" : "深圳",
          "id" : 1630005459,
          "location" : "22.550341, 114.10965",
          "name" : "7天连锁酒店（深圳地王大厦红桂路店）（原红桂路店）",
          "pic" : "https://m.tuniucdn.com/fb2/t1/G2/M00/EA/18/Cii-T1k1KaGIIkQVAAD4fD_T3FcAALTtABiCJ8AAPiU164_w200_h200_c1_t0.jpg",
          "price" : 143,
          "score" : 39,
          "starName" : "二钻"
        },
        "sort" : [
          143
        ]
      }
    ]
  }
}

看第二页

# 分页查询
GET /hotel/_search
{
  "query": {
    "match_all": {}
  },
  "sort": [
    {
      "price": "asc"
    }
  ],
  "from": 3,
  "size": 3
}

运行结果

{
  "took" : 0,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 201,
      "relation" : "eq"
    },
    "max_score" : null,
    "hits" : [
      {
        "_index" : "hotel",
        "_type" : "_doc",
        "_id" : "541619",
        "_score" : null,
        "_source" : {
          "address" : "莘庄镇莘浜路172号",
          "brand" : "如家",
          "business" : "莘庄工业区",
          "city" : "上海",
          "id" : 541619,
          "location" : "31.105797, 121.37755",
          "name" : "如家酒店(上海莘庄地铁站龙之梦商业广场店)",
          "pic" : "https://m.tuniucdn.com/fb3/s1/2n9c/3mKs3jETvJDj3dDdkRB9UyLLvPna_w200_h200_c1_t0.jpg",
          "price" : 149,
          "score" : 44,
          "starName" : "二钻"
        },
        "sort" : [
          149
        ]
      },
      {
        "_index" : "hotel",
        "_type" : "_doc",
        "_id" : "1400304687",
        "_score" : null,
        "_source" : {
          "address" : "龙岗大道横岗段4004号",
          "brand" : "如家",
          "business" : "龙岗中心区/大运新城",
          "city" : "深圳",
          "id" : 1400304687,
          "location" : "22.642629, 114.202799",
          "name" : "如家酒店(深圳横岗地铁站新马商贸城店)",
          "pic" : "https://m.tuniucdn.com/fb2/t1/G6/M00/25/5A/Cii-TF3PFkiIb27dAAEqdDcKl3YAAEViQGVWY0AASqM960_w200_h200_c1_t0.jpg",
          "price" : 149,
          "score" : 43,
          "starName" : "二钻"
        },
        "sort" : [
          149
        ]
      },
      {
        "_index" : "hotel",
        "_type" : "_doc",
        "_id" : "728415",
        "_score" : null,
        "_source" : {
          "address" : "晒布路67号",
          "brand" : "如家",
          "business" : "东门商业区",
          "city" : "深圳",
          "id" : 728415,
          "location" : "22.550183, 114.120771",
          "name" : "如家酒店·neo(深圳东门步行街晒布地铁站店)",
          "pic" : "https://m.tuniucdn.com/fb2/t1/G6/M00/25/57/Cii-U13PFNWISSnQAAEpTtoilsQAAEVWgEvur8AASlm647_w200_h200_c1_t0.jpg",
          "price" : 152,
          "score" : 46,
          "starName" : "二钻"
        },
        "sort" : [
          152
        ]
      }
    ]
  }
}