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新手第一次用IDEA连接数据库, 报了如下错误+警告:

com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Could not create connection to database server.

WARN: Establishing SSL connection without server’s identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be established by default if explicit option isn’t set. For compliance with existing applications not using SSL the verifyServerCertificate property is set to ‘false’. You need either to explicitly disable SSL by setting useSSL=false, or set useSSL=true and provide truststore for server certificate verification.

解决办法:

Connection connection = DriverManager.getConnection(“jdbc:mysql://localhost:3306/库名?serverTimezone=GMT%2B8&useSSL=false”, “用户名”, “密码”);

其中最终要的就是:

1. serverTimezone: 解决错误

网上也有不少说版本不对应, 如果用8版本的MySQL, 就要用8版本的jar包, 并且要修改Class.forName(“com.mysql.cj.jdbc.Driver”). 不过我测试了一下, 似乎并没有太大的作用, 但在这里一并给出.

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