java连接Mongodb

前言

今天学习mongodb连接
参考资料

在IDEA中用三个jar包链接MongoDB数据库——实现增删改查
报错

Exception in monitor thread while connecting to server 47.103.2.91:27017

com.mongodb.MongoSocketOpenException: Exception opening socket

Exception in thread “main” com.mongodb.MongoTimeoutException: Timed out after 30000 ms while waiting to connect. Client view of cluster state is {type=UNKNOWN, servers=[{address=47.103.2.91:27017, type=UNKNOWN, state=CONNECTING, exception={com.mongodb.MongoSocketOpenException: Exception opening socket}, caused by {java.net.ConnectException: Connection refused: connect}}]

参考资料

具体百度这个文件在哪里
https://www.cnblogs.com/cwp-bg/p/9479945.html