Question

这是我的jdbc属性（使用com.mchange.v2.c3p0.ComboPooledDataSource）：

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://myserveraddress:3306/mydatabasename?useUnicode=true&characterEncoding=utf8&autoReconnect=true&useSSL=false
jdbc.username=myusername
jdbc.password=mypassword

当myserveraddress为localhost或my local ip address时，一切正常：）

但是，当myserveraddress为my server ip address（局域网外）时，会出现例外情况:(

Caused by: org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is java.sql.SQLException: An attempt by a client to checkout a Connection has timed out.
Caused by: java.sql.SQLException: An attempt by a client to checkout a Connection has timed out.
Caused by: com.mchange.v2.resourcepool.TimeoutException: A client timed out while waiting to acquire a resource from com.mchange.v2.resourcepool.BasicResourcePool@6c4f5d64 -- timeout at awaitAvailable()

实际上，我已经通过cmd，HeidiSQL，IntelliJ IDEA测试了服务器地址，一切正常......

cmd ping and cmd mysql connection is ok

HeidiSQL connection and IntelliJ IDEA mysql connection test is ok

感到困惑，感谢您的帮助

Answer 1

首先检查您的端口（3306）是否已在此网页http://portchecker.co/上打开（从外部，路由器可能会阻止您的端口接收传入连接），如果没有：

- 在路由器上进行端口转发

OR

- 将您的服务器放到路由器上的DMZ

当localhost没问题时，spring jdbc无法连接远程mysql

1 个答案: