spring boot——集成mongodb——mongodb安装后，简单使用示例

安装后，到安装bin目录下，点击：mongo.exe；

MongoDB shell version v5.0.8
connecting to: mongodb://127.0.0.1:27017/?compressors=disabled&gssapiServiceName=mongodb
Implicit session: session { "id" : UUID("59f8929d-4ba3-4026-a099-8cd8dc40193a") }
MongoDB server version: 5.0.8
================
Warning: the "mongo" shell has been superseded by "mongosh",
which delivers improved usability and compatibility.The "mongo" shell has been deprecated and will be removed in
an upcoming release.
For installation instructions, see
https://docs.mongodb.com/mongodb-shell/install/
================
---
The server generated these startup warnings when booting:
2022-05-28T17:26:01.230+08:00: Access control is not enabled for the database. Read and write access to data and configuration is unrestricted
---
---
Enable MongoDB's free cloud-based monitoring service, which will then receive and display
metrics about your deployment (disk utilization, CPU, operation statistics, etc).
 
The monitoring data will be available on a MongoDB website with a unique URL accessible to you
and anyone you share the URL with. MongoDB may use this information to make product
improvements and to suggest MongoDB products and deployment options to you.
 
To enable free monitoring, run the following command: db.enableFreeMonitoring()
To permanently disable this reminder, run the following command: db.disableFreeMonitoring()
---
> show databases;
admin 0.000GB
config 0.000GB
local 0.000GB
> use biancheng
switched to db biancheng
> show databases;
admin 0.000GB
config 0.000GB
local 0.000GB
> use biancheng
switched to db biancheng
> db.createCollection("user")
{ "ok" : 1 }
> show collections
user
> db.user.insert({title: 'MongoDB 教程', description: 'MongoDB 是一个 Nosql 数据库',by: '菜鸟教程',url: 'http://www.runoob.com',tags: ['mongodb', 'database', 'NoSQL'],likes: 100})
WriteResult({ "nInserted" : 1 })
> show collections
user
> db.user.find()
{ "_id" : ObjectId("6291f135204ac2f1fe7c95f8"), "title" : "MongoDB 教程", "description" : "MongoDB 是一个 Nosql 数据库", "by" : "菜鸟教程", "url" : "http://www.runoob.com", "tags" : [ "mongodb", "database", "NoSQL" ], "likes" : 100 }
>

=========================================================================

创建并使用一个数据库：

> use biancheng

创建一个名为user的集合：

db.createCollection("user")

查看所有集合：

show collections

集合中插入文档：

> db.user.insert({title: 'MongoDB 教程', description: 'MongoDB 是一个 Nosql 数据库',by: '菜鸟教程',url: 'http://www.runoob.com',tags: ['mongodb', 'database', 'NoSQL'],likes: 100})
WriteResult({ "nInserted" : 1 })

查看集合中的文档：

> db.user.find()
{ "_id" : ObjectId("6291f135204ac2f1fe7c95f8"), "title" : "MongoDB 教程", "description" : "MongoDB 是一个 Nosql 数据库", "by" : "菜鸟教程", "url" : "http://www.runoob.com", "tags" : [ "mongodb", "database", "NoSQL" ], "likes" : 100 }

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