mysql数据库无法连接（JDBC）java.net.ConnectException: Connection timed out

数据库无法连接（JDBC）

用户名密码正确，但是一直报错：Connection timed out

后来知道了原因：我用的是BAE提供的云mysql数据库，对访问的IP有限制，所以在本机上无法连接。

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Communications link failure due to underlying exception:

** BEGIN NESTED EXCEPTION **

java.net.SocketException

MESSAGE: java.net.ConnectException: Connection timed out: connect

STACKTRACE:

java.net.SocketException: java.net.ConnectException: Connection timed out: connect

at com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:156)

at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:276)

at com.mysql.jdbc.Connection.createNewIO(Connection.java:2641)

at com.mysql.jdbc.Connection.<init>(Connection.java:1531)

at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:266)

at java.sql.DriverManager.getConnection(DriverManager.java:582)

at java.sql.DriverManager.getConnection(DriverManager.java:185)

at com.fei.keyword.util.JDBCUtil.<init>(JDBCUtil.java:36)

at com.fei.keyword.util.JDBCUtil.main(JDBCUtil.java:15)

** END NESTED EXCEPTION **

Last packet sent to the server was 684 ms ago.

at com.mysql.jdbc.Connection.createNewIO(Connection.java:2707)

at com.mysql.jdbc.Connection.<init>(Connection.java:1531)

at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:266)

at java.sql.DriverManager.getConnection(DriverManager.java:582)

at java.sql.DriverManager.getConnection(DriverManager.java:185)

at com.fei.keyword.util.JDBCUtil.<init>(JDBCUtil.java:36)

at com.fei.keyword.util.JDBCUtil.main(JDBCUtil.java:15)