Why do we have to configure the namespace attribute in the mapper element?

[YHHD]

As shown in the picture, in order to make coding more comfortable, I hope to put the xml file into the package of the source code. This has two benefits:

1. I can easily design the Java interface and configure it because they are all together.
2. MyBatis can directly scan the BlogMapper interface in the package and directly learn the namespace of BlogMapper.xml. There is no need to manually configure it to avoid the possibility of errors.
   However, unfortunately, mybatis does not support this function. I still have to maintain the namespace. I prefer that the configuration file is just an auxiliary to the code. I don’t want to pay attention to whose configuration file belongs to it, and just put it directly into the interface package. , so intuitive and comfortable.