使用java連接Mongodb時報錯：Command failed with error 18 (AuthenticationFailed): ‘Authentication failed.’

報錯信息：

Caused by: com.mongodb.MongoCommandException: Command failed with error 18: 'Authentication failed.' on server XXXXXXX:27017. The full response is { "ok" : 0.0, "errmsg" : "Authentication failed.", "code" : 18, "codeName" : "AuthenticationFailed" }

經過查閱資料發現是使用了錯誤的授權賬號

MongoDB中每個數據庫之間是相互獨立的，都有獨立的權限，正確的做法是使用root賬號在【將要操作的數據庫】中創建一個【子賬號】，在用這個子賬號連接mongo：

>use admin

switched to db admin

>db.auth("root","123456")

1

>show dbs

admin   0.000GB
config  0.000GB
good    0.000GB
local   0.000GB
test    0.000GB

>use good

switched to db good

> db.createUser({user:"daniel",pwd:"123456",roles:[{role:"dbOwner",db:"good"}]})
Successfully added user: {
        "user" : "daniel",
        "roles" : [
                {
                        "role" : "dbOwner",
                        "db" : "good"
                }
        ]
}

最後在java代碼中的代入賬號、密碼等。