在使用高版本mysql出现的问题

问题描述

• 现在使用mysql版本5.7+
• 原使用mysql版本5.5
• 原配置文件

driverClassName: com.mysql.jdbc.Driver
url：jdbc:mysql://127.0.0.1:3306/littlebusiness?allowMultiQueries=true&useUnicode=true&characterEncoding=UTF-8
username：root
password：123

问题1

报第一个错

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.

根据提示修改url

url：jdbc:mysql://127.0.0.1:3306/littlebusiness?allowMultiQueries=true&useUnicode=true&characterEncoding=UTF-8&useSSL=false

问题二

发现问题还是未解决，那是因为mysql.connection驱动版本过低，修改pom文件

<mysql.version>5.1.38</mysql.version>
<dependency>
		<groupId>mysql</groupId>
		<artifactId>mysql-connector-java</artifactId>
		<version>${mysql.version}</version>
</dependency>


// 将版本控制修改为
<mysql.version>8.0.11</mysql.version>

问题三

• 又抛出该The server time zone value 'Öйú±ê׼ʱ¼ä' is unrecognized or represents more than one time zone. You must configure either the server or JDBC driver (via the serverTimezone configuration property) to use a more specifc time zone value if you want to utilize time zone support.“异常
• mysql高版本必须配置时区

// 修改url 和driverClassName
driverClassName: com.mysql.cj.jdbc.Driver
 url: jdbc:mysql://localhost:3306/littlebusiness?useUnicode=true&characterEncoding=utf-8&useSSL=false&serverTimezone=UTC

于是既可成功连接