无法将我的spring-boot应用程序与mongodb云图集连接起来

Question

我们正在尝试从Java应用程序连接到MongoDB云（Atlas）。我不明白为什么我拒绝Connection。这个例外让我产生了：

堆栈跟踪：

sterType=UNKNOWN, serverSelectionTimeout='30000 ms', maxWaitQueueSize=500}
2018-09-17 23:22:13.102  INFO 16140 --- [localhost:27017] org.mongodb.driver.cluster               : Exception in monitor thread while connecting to server localhost:27017
com.mongodb.MongoSocketOpenException: Exception opening socket
    at com.mongodb.connection.SocketStream.open(SocketStream.java:62) ~[mongo-java-driver-3.6.4.jar:na]
    at com.mongodb.connection.InternalStreamConnection.open(InternalStreamConnection.java:126) ~[mongo-java-driver-3.6.4.jar:na]
    at com.mongodb.connection.DefaultServerMonitor$ServerMonitorRunnable.run(DefaultServerMonitor.java:114) ~[mongo-java-driver-3.6.4.jar:na]
    at java.lang.Thread.run(Thread.java:745) [na:1.8.0_101]
Caused by: java.net.ConnectException: Connection refused
    at java.net.PlainSocketImpl.socketConnect(Native Method) ~[na:1.8.0_101]
    at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350) ~[na:1.8.0_101]
    at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206) ~[na:1.8.0_101]
    at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188) ~[na:1.8.0_101]
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) ~[na:1.8.0_101]
    at java.net.Socket.connect(Socket.java:589) ~[na:1.8.0_101]
    at com.mongodb.connection.SocketStreamHelper.initialize(SocketStreamHelper.java:59) ~[mongo-java-driver-3.6.4.jar:na]
    at com.mongodb.connection.SocketStream.open(SocketStream.java:57) ~[mongo-java-driver-3.6.4.jar:na]
    ... 3 common frames omitted

这是我的依赖pom：

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter</artifactId>
</dependency>

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-test</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-tomcat</artifactId>
    <scope>provided</scope>
</dependency>

<dependency>
    <groupId>io.springfox</groupId>
    <artifactId>springfox-swagger2</artifactId>
    <version>2.7.0</version>
</dependency>
<dependency>
    <groupId>org.mongodb</groupId>
    <artifactId>mongo-java-driver</artifactId>
</dependency>
<dependency> 
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-mongodb</artifactId>
</dependency>

这是我的代码java：

        uri = new MongoClientURI(mongodb://[user]:[password]@[hostname]:27017,[hostname]:27017,[hostname]:27017/test?ssl=true&replicaSet=[CLUSTER_NAME]-shard-0&authSource=admin&retryWrites=true);

        mongoClient = new MongoClient(uri);
        database = mongoClient.getDatabase(NAME_DATABASE);

参考：

https://docs.atlas.mongodb.com/driver-connection/#java-driver-example