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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) |
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