1、 Error

pom.xml

Mybatis configuration

start the server: an error is reported

2. The cause of the error
1. There is no problem with various configurations
2. It is considered that jar packages conflict. Changing various jar packages has no effect
3. Finally, type
* * manually and start it successfully

3、 Analyze the possibility of errors

1. The idea is used for a long time and the cache is too large
3. There may be problems with character encoding such as spaces when copying