java spring boot這個錯誤是什么意思

Exception encountered during context initialization - cancelling refresh attempt:
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'webSecurityConfig':
Unsatisfied dependency expressed through field 'userService'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException:
Error creating bean with name 'userService': Unsatisfied dependency expressed through field 'userMapper';
nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userMapper' defined in file

nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'sqlSessionFactory' defined in class path resource

nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in class path resource

org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.apache.tomcat.jdbc.pool.DataSource]: Factory method 'dataSource' threw exception;
nested exception is org.springframework.boot.autoconfigure.jdbc.DataSourceProperties$DataSourceBeanCreationException:
Cannot determine embedded database driver class for database type NONE. If you want an embedded database please put a supported one on the classpath.
If you have database settings to be loaded from a particular profile you may need to active it (no profiles are currently active).### 問題描述

問題出現(xiàn)的環(huán)境背景及自己嘗試過哪些方法

相關(guān)代碼

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你期待的結(jié)果是什么？實際看到的錯誤信息又是什么？