mongodb连接失败_MongoDB 基础入门

  $ ./mongo  MongoDB shell version: 3.0.6  connecting to: test  > show dbs  local  0.078GB  test   0.078GB  >   

  $ ./mongo  MongoDB shell version: 3.0.6  connecting to: test  > db  test  >   

  > use local  switched to db local  > db  local  >   

{"site":"www.runoob.com", "name":"菜鸟教程"}

  {"site":"www.baidu.com"}  {"site":"www.google.com","name":"Google"}  {"site":"www.runoob.com","name":"菜鸟教程","num":5}  

  db.col.findOne()  

db.createCollection("mycoll", {capped:true, size:100000})

  dbname.system.*  

c:>cd c:
​
c:>mkdir data
​
c:>cd data
​
c:data>mkdir db
​
c:data>cd db
​
c:datadb>

C:mongodbbinmongod --dbpath c:datadb

2015-09-25T15:54:09.212+0800 I CONTROL  Hotfix KB2731284 or later update is not
installed, will zero-out data files
2015-09-25T15:54:09.229+0800 I JOURNAL  [initandlisten] journal dir=c:datadbj
ournal
2015-09-25T15:54:09.237+0800 I JOURNAL  [initandlisten] recover : no journal fil
es present, no recovery needed
2015-09-25T15:54:09.290+0800 I JOURNAL  [durability] Durability thread started
2015-09-25T15:54:09.294+0800 I CONTROL  [initandlisten] MongoDB starting : pid=2
488 port=27017 dbpath=c:datadb 64-bit host=WIN-1VONBJOCE88
2015-09-25T15:54:09.296+0800 I CONTROL  [initandlisten] targetMinOS: Windows 7/W
indows Server 2008 R2
2015-09-25T15:54:09.298+0800 I CONTROL  [initandlisten] db version v3.0.6
……

C:mongodbbinmongo.exe

mkdir c:datadb
mkdir c:datalog

systemLog:
    destination: file
    path: c:datalogmongod.log
storage:
    dbPath: c:datadb

C:mongodbbinmongod.exe --config "C:mongodbmongod.cfg" --install

net start MongoDB

net stop MongoDB

C:mongodbbinmongod.exe --remove

> mongo
MongoDB shell version: 3.0.6
connecting to: test
……

> 2 + 2
4
>

> db
test
>

> db.runoob.insert({x:10})
WriteResult({ "nInserted" : 1 })
> db.runoob.find()
{ "_id" : ObjectId("5604ff74a274a611b0c990aa"), "x" : 10 }
>

curl -O https://fastdl.mongodb.org/linux/mongodb-linux-x86_64-3.0.6.tgz    # 下载
tar -zxvf mongodb-linux-x86_64-3.0.6.tgz                                   # 解压
 
mv  mongodb-linux-x86_64-3.0.6/ /usr/local/mongodb                         # 将解压包拷贝到指定目录

export PATH=<mongodb-install-directory>/bin:$PATH

mkdir -p /data/db

$ ./mongod
2015-09-25T16:39:50.549+0800 I JOURNAL  [initandlisten] journal dir=/data/db/journal
2015-09-25T16:39:50.550+0800 I JOURNAL  [initandlisten] recover : no journal files present, no recovery needed
2015-09-25T16:39:50.869+0800 I JOURNAL  [initandlisten] preallocateIsFaster=true 3.16
2015-09-25T16:39:51.206+0800 I JOURNAL  [initandlisten] preallocateIsFaster=true 3.52
2015-09-25T16:39:52.775+0800 I JOURNAL  [initandlisten] preallocateIsFaster=true 7.7

$ cd /usr/local/mongodb/bin
$ ./mongo
MongoDB shell version: 3.0.6
connecting to: test
Welcome to the MongoDB shell.
……

> 2+2
4
> 3+6
9

> db.runoob.insert({x:10})
WriteResult({ "nInserted" : 1 })
> db.runoob.find()
{ "_id" : ObjectId("5604ff74a274a611b0c990aa"), "x" : 10 }
>

$ ./mongod --dbpath=/data/db --rest

data/	conf	-->配置文件目录		mongod.conf		-->配置文件	db		-->数据库目录	log		-->日志文件目录		mongodb.log		-->日志记录文件

F:>mongodb/bin
F:mongodbbin>mongod --path=/data/db

F:mongodbbin>mongod --dbpath "f:datadb" --logpath "f:datalogmongodb.log" --serviceName "mongodb" --serviceDisplayName "mongodb" --install

2016-10-20T23:32:46.339+0800 I CONTROL  log file "f:datalogmongodb.log" exists; moved to "f:datalogmongodb.log.2016-10-20T15-32-46".

F:mongodbbin>net start mongodb 
 
MongoDB 服务已经启动成功。

It looks like you are trying to access MongoDB over HTTP on the native driver port.

  $ ./mongo  MongoDB shell version: 3.0.6  connecting to: test  > mongodb://localhostmongodb://localhost  ...   

  ……省略信息……  2015-09-25T17:22:27.336+0800 I CONTROL  [initandlisten] allocator: tcmalloc  2015-09-25T17:22:27.336+0800 I CONTROL  [initandlisten] options: { storage: { dbPath: "/data/db" } }  2015-09-25T17:22:27.350+0800 I NETWORK  [initandlisten] waiting for connections on port 27017  2015-09-25T17:22:36.012+0800 I NETWORK  [initandlisten] connection accepted from 127.0.0.1:37310 #1 (1 connection now open)  # 该行表明一个来自本机的连接    ……省略信息……  

  $ ./mongo  MongoDB shell version: 3.0.6  connecting to: test  mongodb://admin:123456@localhost/  

  > mongodb://admin:123456@localhost/  ...   

use DATABASE_NAME

> use mongo  
switched to db mongo  
> db 
mongo 
>   

> show dbs  
local  0.078GB  
test   0.078GB  
>   

> db.mongo.insert({"name":"mongodb中文网"})
WriteResult({ "nInserted" : 1 })  
> show dbs  
local   0.078GB  
mongo  0.078GB 
test    0.078GB  
>   

db.dropDatabase()

> show dbs  
local   0.078GB  
mongo   0.078GB  
test    0.078GB

> use runoob  switched to db mongo  >

> db.dropDatabase()  { "dropped" : "runoob", "ok" : 1 }

> show dbs  
local  0.078GB  
test   0.078GB  
> 

  db.collection.drop()  

 db.COLLECTION_NAME.insert(document)  

>db.col.insert({title: 'MongoDB 教程',	
		description: 'MongoDB 是一个 Nosql 数据库',	
		by: 'MongoDB中文网', 	
		url: 'http://www.mongodb.org.cn', 	
		tags: ['mongodb', 'database', 'NoSQL'],	
		likes: 100  
})

> db.col.find()  
{ 	
		"_id" : ObjectId("56064886ade2f21f36b03134"),	
		"title" : "MongoDB 教程",	
		"description" : "MongoDB 是一个 Nosql 数据库",	
		"by" : "MongoDB中文网",	
		"url" : "http://www.mongodb.org.cn",	
		"tags" : [ "mongodb", "database", "NoSQL" ],	
		"likes" : 100 
}
>   

> document=({title: 'MongoDB 教程',
            description: 'MongoDB 是一个 Nosql 数据库',   
            by: 'Mongodb中文网',       
            url: 'http://www.mongodb.org.cn',   
            tags: ['mongodb', 'database', 'NoSQL'],     
            likes: 100  
});  

{           
            "title" : "MongoDB 教程",     
            "description" : "MongoDB 是一个 Nosql 数据库",    
            "by" : "Mongodb中文网",            
            "url" : "http://www.mongodb.org.cn",    
            "tags" : [                      
                    "mongodb",                  
                    "database",             
                    "NoSQL"         
            ],          
            "likes" : 100  
}  

> db.col.insert(document)  WriteResult({ "nInserted" : 1 })  >   

db.collection.remove(   
        <query>,        
        <justOne> 
)  

db.collection.remove(       
        <query>,        
        {               
                justOne: <boolean>,     
                writeConcern: <document>    
        } 
)

>db.col.insert({title: 'MongoDB 教程', 	
		description: 'MongoDB 是一个 Nosql 数据库', 	
		by: 'MongoDB中文网',   	
		url: 'http://www.mongodb.org.cn', 	
		tags: ['mongodb', 'database', 'NoSQL'], 	
		likes: 100 
}) 

> db.col.find()  
{ "_id" : ObjectId("56066169ade2f21f36b03137"), "title" : "MongoDB 教程", "description" : "MongoDB 是一个 Nosql 数据库", "by" : "MongoDB中文网", "url" : "http://www.mongodb.org.cn", "tags" : [ "mongodb", "database", "NoSQL" ], "likes" : 100 }  
{ "_id" : ObjectId("5606616dade2f21f36b03138"), "title" : "MongoDB 教程", "description" : "MongoDB 是一个 Nosql 数据库", "by" : "MongoDB中文网", "url" : "http://www.mongodb.org.cn", "tags" : [ "mongodb", "database", "NoSQL" ], "likes" : 100 }  

  >db.col.remove({'title':'MongoDB 教程'})  WriteResult({ "nRemoved" : 2 })           
  # 删除了两条数据  >db.col.find()  ……                                        # 没有数据  

>db.COLLECTION_NAME.remove(DELETION_CRITERIA,1)

>db.col.remove({})  
>db.col.find()  
>

db.collection.update(       
            <query>,    
            <update>,   
            {               
                    upsert: <boolean>,          
                    multi: <boolean>,       
                    writeConcern: <document>    
            }
)

>db.col.insert({  	
		title: 'Mongodb 教程',  	
		description: 'MongoDB 是一个 Nosql 数据库',   	
		by: 'Mongodb中文网',   	
		url: 'http://www.mongodb.org.cn',   	
		tags: ['mongodb', 'database', 'NoSQL'],  	likes: 100  
 
})

>db.col.update({'title':'MongoDB 教程'},{$set:{'title':'MongoDB'}})
WriteResult({ "nMatched" : 1, "nUpserted" : 0, "nModified" : 1 })   # 输出信息  
> db.col.find().pretty()  
{         	
		"_id" : ObjectId("56064f89ade2f21f36b03136"),  	
		"title" : "MongoDB",   	
		"description" : "MongoDB 是一个 Nosql 数据库",  	
		"by" : "Mongodb中文网",      	
		"url" : "http://www.mongodb.org.cn", 	
		"tags" : [   		
					"mongodb",   		
					"database",   		
					"NoSQL"      	
		],      	
		"likes" : 100  
}  
>  

  >db.col.update({'title':'MongoDB 教程'},{$set:{'title':'MongoDB'}},{multi:true})

db.collection.save(    	
			<document>,     	
			{      		writeConcern: <document> 	
			}  
)  

>db.col.save({  		
		"_id" : ObjectId("56064f89ade2f21f36b03136"),   	
		"title" : "MongoDB",  	
		"description" : "MongoDB 是一个 Nosql 数据库",	
		"by" : "MongoDB中文网",   	
		"url" : "http://www.mongodb.org.cn",     	
		"tags" : [           		
				"mongodb",       		
				"NoSQL"    	
		],    	
		"likes" : 110	
		}
)

>db.col.find().pretty()
{          	
		"_id" : ObjectId("56064f89ade2f21f36b03136"),  	
		"title" : "MongoDB",   	
		"description" : "MongoDB 是一个 Nosql 数据库", 	
		"by" : "Mongo",         	
		"url" : "http://www.mongodb.org.cn",   	
		"tags" : [                		
					"mongodb",      		
					"NoSQL"        	
		],      	
		"likes" : 110 
}  
>

db.col.update( { "count" : { $gt : 1 } } , { $set : { "test2" : "OK"} } );

db.col.update( { "count" : { $gt : 3 } } , { $set : { "test2" : "OK"} },false,true );

db.col.update( { "count" : { $gt : 4 } } , { $set : { "test5" : "OK"} },true,false );

db.col.update( { "count" : { $gt : 5 } } , { $set : { "test5" : "OK"} },true,true );

db.col.update( { "count" : { $gt : 15 } } , { $inc : { "count" : 1} },false,true );

db.col.update( { "count" : { $gt : 10 } } , { $inc : { "count" : 1} },false,false );

db.collection.find(query, projection)

>db.col.find().pretty()

> db.col.find().pretty()
{
        "_id" : ObjectId("56063f17ade2f21f36b03133"),
        "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
}

>db.col.find({key1:value1, key2:value2}).pretty()

> db.col.find({"by":"菜鸟教程", "title":"MongoDB 教程"}).pretty()
{
        "_id" : ObjectId("56063f17ade2f21f36b03133"),
        "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
}

>db.col.find(
   {
      $or: [
         {key1: value1}, {key2:value2}
      ]
   }
).pretty()

>db.col.find({$or:[{"by":"菜鸟教程"},{"title": "MongoDB 教程"}]}).pretty()
{
        "_id" : ObjectId("56063f17ade2f21f36b03133"),
        "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
}
>

>db.col.find({"likes": {$gt:50}, $or: [{"by": "菜鸟教程"},{"title": "MongoDB 教程"}]}).pretty()
{
        "_id" : ObjectId("56063f17ade2f21f36b03133"),
        "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
}

db.col.remove({})

>db.col.insert({
    title: 'PHP 教程', 
    description: 'PHP 是一种创建动态交互性站点的强有力的服务器端脚本语言。',
    by: '菜鸟教程',
    url: 'http://www.runoob.com',
    tags: ['php'],
    likes: 200
})
>db.col.insert({title: 'Java 教程', 
    description: 'Java 是由Sun Microsystems公司于1995年5月推出的高级程序设计语言。',
    by: '菜鸟教程',
    url: 'http://www.runoob.com',
    tags: ['java'],
    likes: 150
})
>db.col.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'],
    likes: 100
})

> db.col.find()
{ "_id" : ObjectId("56066542ade2f21f36b0313a"), "title" : "PHP 教程", "description" : "PHP 是一种创建动态交互性站点的强有力的服务器端脚本语言。", "by" : "菜鸟教程", "url" : "http://www.runoob.com", "tags" : [ "php" ], "likes" : 200 }
{ "_id" : ObjectId("56066549ade2f21f36b0313b"), "title" : "Java 教程", "description" : "Java 是由Sun Microsystems公司于1995年5月推出的高级程序设计语言。", "by" : "菜鸟教程", "url" : "http://www.runoob.com", "tags" : [ "java" ], "likes" : 150 }
{ "_id" : ObjectId("5606654fade2f21f36b0313c"), "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" ], "likes" : 100 }

db.col.find({likes : {$gt : 100}})

Select * from col where likes > 100;

> db.col.find({likes : {$gt : 100}})
{ "_id" : ObjectId("56066542ade2f21f36b0313a"), "title" : "PHP 教程", "description" : "PHP 是一种创建动态交互性站点的强有力的服务器端脚本语言。", "by" : "菜鸟教程", "url" : "http://www.runoob.com", "tags" : [ "php" ], "likes" : 200 }
{ "_id" : ObjectId("56066549ade2f21f36b0313b"), "title" : "Java 教程", "description" : "Java 是由Sun Microsystems公司于1995年5月推出的高级程序设计语言。", "by" : "菜鸟教程", "url" : "http://www.runoob.com", "tags" : [ "java" ], "likes" : 150 }
> 

db.col.find({likes : {$gte : 100}})

Select * from col where likes >=100;

> db.col.find({likes : {$gte : 100}})
{ "_id" : ObjectId("56066542ade2f21f36b0313a"), "title" : "PHP 教程", "description" : "PHP 是一种创建动态交互性站点的强有力的服务器端脚本语言。", "by" : "菜鸟教程", "url" : "http://www.runoob.com", "tags" : [ "php" ], "likes" : 200 }
{ "_id" : ObjectId("56066549ade2f21f36b0313b"), "title" : "Java 教程", "description" : "Java 是由Sun Microsystems公司于1995年5月推出的高级程序设计语言。", "by" : "菜鸟教程", "url" : "http://www.runoob.com", "tags" : [ "java" ], "likes" : 150 }
{ "_id" : ObjectId("5606654fade2f21f36b0313c"), "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" ], "likes" : 100 }
> 

db.col.find({likes : {$lt : 150}})

Select * from col where likes < 150;

> db.col.find({likes : {$lt : 150}})
{ "_id" : ObjectId("5606654fade2f21f36b0313c"), "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" ], "likes" : 100 }

db.col.find({likes : {$lte : 150}})

Select * from col where likes <= 150;

> db.col.find({likes : {$lte : 150}})
{ "_id" : ObjectId("56066549ade2f21f36b0313b"), "title" : "Java 教程", "description" : "Java 是由Sun Microsystems公司于1995年5月推出的高级程序设计语言。", "by" : "菜鸟教程", "url" : "http://www.runoob.com", "tags" : [ "java" ], "likes" : 150 }
{ "_id" : ObjectId("5606654fade2f21f36b0313c"), "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" ], "likes" : 100 }

db.col.find({likes : {$lt :200, $gt : 100}})

Select * from col where likes>100 AND  likes<200;

> db.col.find({likes : {$lt :200, $gt : 100}})
{ "_id" : ObjectId("56066549ade2f21f36b0313b"), "title" : "Java 教程", "description" : "Java 是由Sun Microsystems公司于1995年5月推出的高级程序设计语言。", "by" : "菜鸟教程", "url" : "http://www.runoob.com", "tags" : [ "java" ], "likes" : 150 }
> 

>db.col.insert({
    title: 'PHP 教程', 
    description: 'PHP 是一种创建动态交互性站点的强有力的服务器端脚本语言。',
    by: '菜鸟教程',
    url: 'http://www.runoob.com',
    tags: ['php'],
    likes: 200
})
>db.col.insert({title: 'Java 教程', 
    description: 'Java 是由Sun Microsystems公司于1995年5月推出的高级程序设计语言。',
    by: '菜鸟教程',
    url: 'http://www.runoob.com',
    tags: ['java'],
    likes: 150
})
>db.col.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'],
    likes: 100
})

> db.col.find()
{ "_id" : ObjectId("56066542ade2f21f36b0313a"), "title" : "PHP 教程", "description" : "PHP 是一种创建动态交互性站点的强有力的服务器端脚本语言。", "by" : "菜鸟教程", "url" : "http://www.runoob.com", "tags" : [ "php" ], "likes" : 200 }
{ "_id" : ObjectId("56066549ade2f21f36b0313b"), "title" : "Java 教程", "description" : "Java 是由Sun Microsystems公司于1995年5月推出的高级程序设计语言。", "by" : "菜鸟教程", "url" : "http://www.runoob.com", "tags" : [ "java" ], "likes" : 150 }
{ "_id" : ObjectId("5606654fade2f21f36b0313c"), "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" ], "likes" : 100 }

db.col.find({"title" : {$type : 2}})
或
db.col.find({"title" : {$type : 'string'}})

{ "_id" : ObjectId("56066542ade2f21f36b0313a"), "title" : "PHP 教程", "description" : "PHP 是一种创建动态交互性站点的强有力的服务器端脚本语言。", "by" : "菜鸟教程", "url" : "http://www.runoob.com", "tags" : [ "php" ], "likes" : 200 }
{ "_id" : ObjectId("56066549ade2f21f36b0313b"), "title" : "Java 教程", "description" : "Java 是由Sun Microsystems公司于1995年5月推出的高级程序设计语言。", "by" : "菜鸟教程", "url" : "http://www.runoob.com", "tags" : [ "java" ], "likes" : 150 }
{ "_id" : ObjectId("5606654fade2f21f36b0313c"), "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" ], "likes" : 100 }

>db.COLLECTION_NAME.find().limit(NUMBER)

{ "_id" : ObjectId("56066542ade2f21f36b0313a"), "title" : "PHP 教程", "description" : "PHP 是一种创建动态交互性站点的强有力的服务器端脚本语言。", "by" : "菜鸟教程", "url" : "http://www.runoob.com", "tags" : [ "php" ], "likes" : 200 }
{ "_id" : ObjectId("56066549ade2f21f36b0313b"), "title" : "Java 教程", "description" : "Java 是由Sun Microsystems公司于1995年5月推出的高级程序设计语言。", "by" : "菜鸟教程", "url" : "http://www.runoob.com", "tags" : [ "java" ], "likes" : 150 }
{ "_id" : ObjectId("5606654fade2f21f36b0313c"), "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" ], "likes" : 100 }

> db.col.find({},{"title":1,_id:0}).limit(2)
{ "title" : "PHP 教程" }
{ "title" : "Java 教程" }
>

>db.COLLECTION_NAME.find().limit(NUMBER).skip(NUMBER)

>db.col.find({},{"title":1,_id:0}).limit(1).skip(1)
{ "title" : "Java 教程" }
>

>db.COLLECTION_NAME.find().sort({KEY:1})

{ "_id" : ObjectId("56066542ade2f21f36b0313a"), "title" : "PHP 教程", "description" : "PHP 是一种创建动态交互性站点的强有力的服务器端脚本语言。", "by" : "菜鸟教程", "url" : "http://www.runoob.com", "tags" : [ "php" ], "likes" : 200 }
{ "_id" : ObjectId("56066549ade2f21f36b0313b"), "title" : "Java 教程", "description" : "Java 是由Sun Microsystems公司于1995年5月推出的高级程序设计语言。", "by" : "菜鸟教程", "url" : "http://www.runoob.com", "tags" : [ "java" ], "likes" : 150 }
{ "_id" : ObjectId("5606654fade2f21f36b0313c"), "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" ], "likes" : 100 }

>db.col.find({},{"title":1,_id:0}).sort({"likes":-1})
{ "title" : "PHP 教程" }
{ "title" : "Java 教程" }
{ "title" : "MongoDB 教程" }
>

<dependencies>
    <!--spring-boot起步依赖-->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-mongodb</artifactId>
    </dependency>
    <!--实体-->
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <version>1.16.18</version>
    </dependency>
</dependencies>

spring.application.name=mongodb_demo
server.port=8080
​
​
spring.data.mongodb.uri=mongodb://localhost:27017/test

package com.hellojava.dao;
​
​
​
import com.hellojava.model.MongoTest;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.mongodb.core.MongoTemplate;
import org.springframework.data.mongodb.core.query.Criteria;
import org.springframework.data.mongodb.core.query.Query;
import org.springframework.data.mongodb.core.query.Update;
import org.springframework.stereotype.Component;
​
@Component
public class MongoTestDao {
​
​
    @Autowired
    private MongoTemplate mongoTemplate;
​
    /**
     * 创建对象
     */
    public void saveTest(MongoTest test) {
        mongoTemplate.save(test);
    }
​
    /**
     * 根据用户名查询对象
     * @return
     */
    public MongoTest findTestByName(String name) {
        Query query=new Query(Criteria.where("name").is(name));
        MongoTest mgt =  mongoTemplate.findOne(query , MongoTest.class);
        return mgt;
    }
​
    /**
     * 更新对象
     */
    public void updateTest(MongoTest test) {
        Query query=new Query(Criteria.where("id").is(test.getId()));
        Update update= new Update().set("age", test.getAge()).set("name", test.getName());
        //更新查询返回结果集的第一条
        mongoTemplate.updateFirst(query,update,MongoTest.class);
        //更新查询返回结果集的所有
        // mongoTemplate.updateMulti(query,update,TestEntity.class);
    }
​
    /**
     * 删除对象
     * @param id
     */
    public void deleteTestById(Integer id) {
        Query query=new Query(Criteria.where("id").is(id));
        mongoTemplate.remove(query,MongoTest.class);
    }
}