Spring Boot连接Mongo DB权限认证失败及解决方案异常详情:解决方案：报错解决之前，MongoDB数据库连

异常详情:

com.mongodb.MongoSecurityException: Exception authenticating MongoCredential{mechanism=null, userName='admin', source='admin', password=<hidden>, mechanismProperties={}}
	at com.mongodb.connection.SaslAuthenticator.wrapException(SaslAuthenticator.java:162) ~[mongodb-driver-core-3.6.4.jar:na]
	at com.mongodb.connection.SaslAuthenticator.access$200(SaslAuthenticator.java:39) ~[mongodb-driver-core-3.6.4.jar:na]
	at com.mongodb.connection.SaslAuthenticator$1.run(SaslAuthenticator.java:68) ~[mongodb-driver-core-3.6.4.jar:na]
	at com.mongodb.connection.SaslAuthenticator$1.run(SaslAuthenticator.java:46) ~[mongodb-driver-core-3.6.4.jar:na]
	at com.mongodb.connection.SaslAuthenticator.doAsSubject(SaslAuthenticator.java:168) ~[mongodb-driver-core-3.6.4.jar:na]
	at com.mongodb.connection.SaslAuthenticator.authenticate(SaslAuthenticator.java:46) ~[mongodb-driver-core-3.6.4.jar:na]
	at com.mongodb.connection.DefaultAuthenticator.authenticate(DefaultAuthenticator.java:32) ~[mongodb-driver-core-3.6.4.jar:na]
	at com.mongodb.connection.InternalStreamConnectionInitializer.authenticateAll(InternalStreamConnectionInitializer.java:122) ~[mongodb-driver-core-3.6.4.jar:na]
	at com.mongodb.connection.InternalStreamConnectionInitializer.initialize(InternalStreamConnectionInitializer.java:52) ~[mongodb-driver-core-3.6.4.jar:na]
	at com.mongodb.connection.InternalStreamConnection.open(InternalStreamConnection.java:127) ~[mongodb-driver-core-3.6.4.jar:na]
	at com.mongodb.connection.DefaultServerMonitor$ServerMonitorRunnable.run(DefaultServerMonitor.java:114) ~[mongodb-driver-core-3.6.4.jar:na]
	at java.lang.Thread.run(Thread.java:748) [na:1.8.0_172]
Caused by: com.mongodb.MongoCommandException: Command failed with error 18: 'Authentication failed.' on server 192.9.104.125:29017. The full response is { "ok" : 0.0, "code" : 18, "errmsg" : "Authentication failed." }
	at com.mongodb.connection.ProtocolHelper.getCommandFailureException(ProtocolHelper.java:164) ~[mongodb-driver-core-3.6.4.jar:na]
	at com.mongodb.connection.InternalStreamConnection.receiveCommandMessageResponse(InternalStreamConnection.java:295) ~[mongodb-driver-core-3.6.4.jar:na]
	at com.mongodb.connection.InternalStreamConnection.sendAndReceive(InternalStreamConnection.java:255) ~[mongodb-driver-core-3.6.4.jar:na]
	at com.mongodb.connection.CommandHelper.sendAndReceive(CommandHelper.java:84) ~[mongodb-driver-core-3.6.4.jar:na]
	at com.mongodb.connection.CommandHelper.executeCommand(CommandHelper.java:34) ~[mongodb-driver-core-3.6.4.jar:na]
	at com.mongodb.connection.SaslAuthenticator.sendSaslStart(SaslAuthenticator.java:119) ~[mongodb-driver-core-3.6.4.jar:na]
	at com.mongodb.connection.SaslAuthenticator.access$000(SaslAuthenticator.java:39) ~[mongodb-driver-core-3.6.4.jar:na]
	at com.mongodb.connection.SaslAuthenticator$1.run(SaslAuthenticator.java:52) ~[mongodb-driver-core-3.6.4.jar:na]
	... 9 common frames omitted

解决方案：

报错解决之前，MongoDB 数据库连接配置

 spring: 
	 data:
	    mongodb:
	      username: admin
	      password: admin
	      host: localhost
	      port: 27017
	      database: admin

报错解决之后，MongoDB 数据库连接配置

spring: 
   data:
	  mongodb:
	     uri: mongodb://admin:admin@localhost:27017/admin
	     # 需要用户名和密码认证
	     #uri:  mongodb://username:password@ip:port/admin
	
	     #不需要用户名和密码认证
	     #uri:  mongodb://ip:port/admin

MongoDB远程连接身份认证:

切换到 MongoDB的bin目录下
执行连接命令，若端口是默认端口，则端口不需要另外指定
```
./mongo --port 27017
```
切换数据库
```
use admin
```
使用用户名和密码进行认证
```
db.auth('username','password')
```

Mr.superbeyone