Cause: java.sql.SQLExceptioValue ‘0000-00-00 00:00:00‘ can not be represented as java.sql.Timestamp

今天使用mybatis创建demo测试的时候发现了一个有意思的bug

org.apache.ibatis.exceptions.PersistenceException:
### Error querying database.  Cause: org.apache.ibatis.executor.result.ResultMapException: Error attempting to get column 'last_login_at' from result set.  Cause: java.sql.SQLException: Value '0000-00-00 00:00:00' can not be represented as java.sql.Timestamp
### The error may exist in com/ssm/dzk/mapper/UserMapper.xml
### The error may involve com.ssm.dzk.service.UserService.getAll
### The error occurred while handling results
### SQL: select * from t_user
### Cause: org.apache.ibatis.executor.result.ResultMapException: Error attempting to get column 'last_login_at' from result set.  Cause: java.sql.SQLException: Value '0000-00-00 00:00:00' can not be represented as java.sql.Timestamp

这个异常简单的来说就是数据库时区的问题导致 ‘last_login_at’ 这个字段不能正常获取。

贴上我的xml配置

<environment id="development">
<transactionManager type="JDBC"/><dataSource type="POOLED"><property name="driver" value="com.mysql.jdbc.Driver"/><property name="url" value="jdbc:mysql://127.0.01:3310/test"/><property name="username" value="root"/><property name="password" value="root"/></dataSource>
</environment>

不知道各位发现了什么没有。

我并没有在url 配置数据库的安全链接和数据库编码格式和数据库时区

就是这个小疏忽导致的。
现在把它加上

jdbc:mysql://127.0.01:3310/test?allowMultiQueries=true&amp;useSSL=false&amp;zeroDateTimeBehavior=convertToNull&amp;characterEncoding=UTF-8"/>

因为我是直接写在xml文件中的，要是有同学写在properties中或者yml中，请参考下面

jdbc:mysql://127.0.01:3310/test?allowMultiQueries=true&useSSL=false&zeroDateTimeBehavior=convertToNull&characterEncoding=UTF-8

至此bug愉快解决。

拓展
xml中 & 是需要转义的。把 & 转义为 &
而properties和yml是不需要转义的。
当然还是建议大家把数据连接信息单独写在properties、yml中。

此bug是我开发过程中遇到的一个小问题，在此记录。若能帮到你不胜荣幸。

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