我使用的是MySQL8.0的版本，代码如下：
package mysql;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
public class mysql {
// 数据库地址
private static String dbUrl = "jdbc:mysql://localhost:3306/student?"
+ "useSSL=true&characterEncoding=utf-8&serverTimezone=GMT";
// 用户名
private static String dbUserName = "root";
// 密码
private static String dbPassword = "123456";
// 驱动名称
private static String jdbcName = "com.mysql.cj.jdbc.Driver";
public static void main(String[] args) {
try {
Class.forName(jdbcName);
System.out.println("加载驱动成功！");
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
System.out.println("加载驱动失败！");
}
Connection con = null;
try {
// 获取数据库连接
con = DriverManager.getConnection(dbUrl, dbUserName, dbPassword);
System.out.println("获取数据库连接成功！");
System.out.println("进行数据库操作！");
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
System.out.println("获取数据库连接失败！");
} finally {
try {
con.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
结果报错：com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure
解决办法，使用jdbc8.0.16版本就可以了
下载地址：https://mvnrepository.com/artifact/mysql/mysql-connector-java/8.0.16
