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RSS订阅原创 undefine
undefined 是一个类型，也是一个存着undefined值的变量 即undefined=undefined 可以通过变量声明的方式修改undefined的值对其进行覆盖，如 var undefined = 0; 此时此作用域下的undefined的值就变为了 0。（*****一定要加变量声明关键字。） ...
2021-12-16 09:02:33
819
原创 org.springframework.dao.DataIntegrityViolationException:
Error updating database. Cause: java.sql.SQLException: Field ‘id’ doesn’t have a default value The error may exist in··········· The error may involve········· The error occurred while ······· Cause: java.sql.SQLException: Field ‘id’ doesn’t have a defaul
2020-09-04 16:01:00
1933
原创 连接MySQL数据库时出现：“Establishing SSL connection without server‘s identity verification is not recommended
连接MySQL数据库时出现：“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 wit
2020-08-23 22:34:18
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