org.springframework.beans.factory.UnsatisfiedDependencyException:
Error creating bean with name 'attrAttrgroupRelationController': 
Unsatisfied dependency expressed through field 'attrAttrgroupRelationService'; 
nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: 
Error creating bean with name 'attrAttrgroupRelationService': Unsatisfied dependency expressed through field 'baseMapper'; 
nested exception is org.springframework.beans.factory.BeanCreationException:
Error creating bean with name 'attrAttrgroupRelationDao' defined in file
 

Error creating bean with name ‘attrAttrgroupRelationController‘_sed

 

解决：
网上方法参考之后判定不是注解的问题，也不是没有exlude的问题。初步判定为springboot版本问题。将springboot版本从2.3.10降至2.1.8，springcloud从H版降至G版即可。注意springboot-springcloud-springcloud alibaba三者之间对应的版本关系

 

javax.net.ssl.SSLHandshakeException: No appropriate protocol (protocol is disabled or cipher suites are inappropriate)
### Error querying database.  Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain JDBC Connection; nested exception is com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure

The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
### The error may exist in com/cloud/mail/product/dao/CategoryDao.java (best guess)
### The error may involve com.cloud.mail.product.dao.CategoryDao.selectList
### The error occurred while executing a query
### Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain JDBC Connection; nested exception is com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure
 

解决：
 查询网上攻略，说是jdk1.8版本导致​​SSL​​调用权限出现问题。只需要在连接数据库的时候，加上userSSL=false即可。无需到java.security中删除SSLV3协议。