为什么 mysql-connector 将 YEAR(4) 视为日期？
Why does mysql-connector tread YEAR(4) as Date?
https://dev.mysql.com/doc/connector-j/8.0/en/connector-j-reference-configuration-properties.html
yearIsDateType
Should the JDBC driver treat the MySQL type "YEAR" as a java.sql.Date,
or as a SHORT?
Default: true
问题：如果YEAR(4)是mysql中的Integer（默认情况下是），为什么mysql-connector java驱动程序然后踩年份值为 Date?
我的意思是，这个默认配置是否有意义？
因为：如果您不仔细查看数据库，您会假设 2017-01-01 等值直接来自数据库。但是，数据库仅将 2017 作为年份值保存，而 java 会默默地添加月份的第一天。
文档是这样说的：
YEAR[(2|4)]
YEAR
If yearIsDateType configuration property is set to false, then the
returned object type is java.sql.Short. If set to true (the default),
then the returned object is of type java.sql.Date with the date set to
January 1st, at midnight.
来源：https://dev.mysql.com/doc/connector-j/8.0/en/connector-j-reference-type-conversions.html
https://dev.mysql.com/doc/connector-j/8.0/en/connector-j-reference-configuration-properties.html
yearIsDateType
Should the JDBC driver treat the MySQL type "YEAR" as a java.sql.Date, or as a SHORT?
Default: true
问题：如果YEAR(4)是mysql中的Integer（默认情况下是），为什么mysql-connector java驱动程序然后踩年份值为 Date?
我的意思是，这个默认配置是否有意义？
因为：如果您不仔细查看数据库，您会假设 2017-01-01 等值直接来自数据库。但是，数据库仅将 2017 作为年份值保存，而 java 会默默地添加月份的第一天。
文档是这样说的：
YEAR[(2|4)]
YEARIf
yearIsDateTypeconfiguration property is set to false, then the returned object type isjava.sql.Short. If set totrue(the default), then the returned object is of typejava.sql.Datewith the date set to January 1st, at midnight.
来源：https://dev.mysql.com/doc/connector-j/8.0/en/connector-j-reference-type-conversions.html