Elasticsearch7.10.2接口Demo记录（持续更新中···）

版本：7.10.2
分词插件：analysis-ik

索引

创建索引

put localhost:9200/索引名称

//响应
{
    "acknowledged": true,
    "shards_acknowledged": true,
    "index": "schools"
}

映射

get localhost:9200/索引名称/_mapping

{
    "properties": {
        "id": {
            "type": "integer", //字段类型
            "index": true //是否索引。true：可以被搜索，false：不能被搜索
        }, //字段值
        "content": {
            "type": "text",
            "index": true,
            "analyzer": "ik_max_word" //指定分词器，这里使用IK分词器的最细分词模式
        }
    }
}

//响应
{
    "acknowledged": true
}

查看某个索引信息

get localhost:9200/索引名称

//响应
{
    "news": {
        "aliases": {},
        "mappings": {
            "properties": {
                "content": {
                    "type": "text"
                },
                "id": {
                    "type": "integer"
                }
            }
        }, //映射信息
        "settings": {
            "index": {
                "routing": {
                    "allocation": {
                        "include": {
                            "_tier_preference": "data_content"
                        }
                    }
                },
                "number_of_shards": "1",
                "provided_name": "news",
                "creation_date": "1656060844110",
                "number_of_replicas": "1",
                "uuid": "n9pBE7LoSkuWHGfkTWW2Bg",
                "version": {
                    "created": "7100299"
                }
            }
        }
    }
}

删除索引

delete localhost:9200/索引名称

//响应
{
    "acknowledged": true
}

文档

创建文档

post localhost:9200/索引名称/_doc

{
    "id": 10002,
    "content": "阿凡达2预计今年上映"
}

//响应
{
    "_index": "news",
    "_type": "_doc",
    "_id": "XqjxlIEBA0SYXO9Jq6zp",
    "_version": 1,
    "result": "created",
    "_shards": {
        "total": 2,
        "successful": 1,
        "failed": 0
    },
    "_seq_no": 2,
    "_primary_term": 1
}

创建文档（携带主键）

post localhost:9200/索引名称/_doc/主键

{
    "id": 10003,
    "content": "今年粮食大丰收"
}

//响应
{
    "_index": "news",
    "_type": "_doc",
    "_id": "id-10003", //主键
    "_version": 1,
    "result": "created",
    "_shards": {
        "total": 2,
        "successful": 1,
        "failed": 0
    },
    "_seq_no": 3,
    "_primary_term": 1
}

查看单个文档（主键查询）

get localhost:9200/索引名称/_doc/主键

//响应
{
    "_index": "news",
    "_type": "_doc",
    "_id": "id-10003",
    "_version": 1,
    "_seq_no": 3,
    "_primary_term": 1,
    "found": true,
    "_source": {
        "id": 10003,
        "content": "今年粮食大丰收"
    }
}

查看全部文档

get localhost:9200/索引名称/_search

//响应
{
    "took": 59,
    "timed_out": false,
    "_shards": {
        "total": 1,
        "successful": 1,
        "skipped": 0,
        "failed": 0
    },
    "hits": {
        "total": {
            "value": 4,
            "relation": "eq"
        },
        "max_score": 1.0,
        "hits": [
            {
                "_index": "news",
                "_type": "_doc",
                "_id": "XKjvlIEBA0SYXO9Jb6zJ",
                "_score": 1.0,
                "_source": {
                    "id": 10000,
                    "content": "今年是中国成立70周年，天安门广场举行了盛大的阅兵仪式，现场人山人海，CCTV全程直播"
                }
            },
            {
                "_index": "news",
                "_type": "_doc",
                "_id": "XajwlIEBA0SYXO9JoaxW",
                "_score": 1.0,
                "_source": {
                    "id": 10001,
                    "content": "美国从阿富汗撤兵，结束了长达20年的阿富汗战争，大量装备被遗弃在阿富汗"
                }
            },
            {
                "_index": "news",
                "_type": "_doc",
                "_id": "XqjxlIEBA0SYXO9Jq6zp",
                "_score": 1.0,
                "_source": {
                    "id": 10002,
                    "content": "阿凡达2预计今年上映，导演是卡梅隆，将由阿凡达1原班人马出演，具体上映时间待定"
                }
            },
            {
                "_index": "news",
                "_type": "_doc",
                "_id": "id-10003",
                "_score": 1.0,
                "_source": {
                    "id": 10003,
                    "content": "今年粮食大丰收"
                }
            }
        ]
    }
}

根据条件查询文档

get localhost:9200/索引名称/_search

//匹配类型查询，会把查询条件进行分词，然后进行查询，多个词条之间是 or 的关系。
{
    "query": {
        "match": {
            "字段1": "中国"
        }
    }
}

//把多个词条的关系变为and
{
    "query": {
        "match": {
            "字段1": {
                "query": "美国",
                "operator": "and"
            }
        }
    }
}

分页+排序查询

{
    "query": {
        "match_all": {}
    },
    "from": 0, //起始位置，同MySQL中的offset，计算公式：(页码-1)*size
    "size": 2, //显示数量，同MySQL中的limit
    "_source": [
        "字段1",
        "字段2"
    ], //显示的字段
    "sort": {
        "字段1": {
            "order": "desc" //asc：升序排列
        } //通过字段id倒序排列
    }
}

多条件查询

bool：把各种其他查询通过must（必须and）、nust_not（必须不）、should（应该or）的方式进行组合

and

{
    "query": {
        "bool": {
            "must": [
                {
                    "match": {
                        "字段1": "中国"
                    }
                },
                {
                    "match": {
                        "字段2": 100
                    }
                }
            ]
        }
    }
}

or

{
    "query": {
        "bool": {
            "should": [
                {
                    "match": {
                        "字段1": "中国"
                    }
                },
                {
                    "match": {
                        "字段2": 100
                    }
                }
            ]
        }
    }
}

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