MySQL Connector to J 8.0 Q&A

Posted 2020-11-17

Connection

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Q:Driver/Datasource Class Name

A:
?低版本：com.mysql.jdbc.Driver
?高版本(5.7+):com.mysql.cj.jdbc.Driver
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Q:Connection URL Syntax

A:
This is the generic format of the connection URL:

    protocol//[hosts][/database][?properties]

For example:

    jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf8&useSSL=true&serverTimezone=GMT%2B8

注：使用tomcat开设服务器(端口3306)，数据库名test,属性使用‘&’分隔
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Properties

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Q:Using Character Sets and Unicode

A:
The character encoding between client and server is automatically detected upon connection. You must specify the encoding on server using the URL to connect database.
For example, to user UTF-8 chatacter sets with Connector/J. You can using "characterEncoding=utf8" to config your Connector/J.

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Q:Connecting Securely Using SSL

A:
SSL:Secure Socket Layer，用以保障在Internet上数据传输之安全，利用数据加密(Encryption)技术，可确保数据在网络上之传输过程中不会被截取及窃听。
For example:

    useSSL=true or useSSL=false

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Q:使用JDBC驱动关于时区引发的问题

A:
1.降低MySQL版本(5.6以下)
2.增加serverTimezone=UTC或GMT，如果指定使用gmt+8时区，需要写为GMT%2B8，否则可能解析为空。