springBoot项目引入外部Tomcat时，启动Tomcat报错

报错信息：

严重: Unable to process Jar entry [module-info.class] 
from Jar [jar:file:xxxxxT/WEB-INF/lib/log4j-api-2.10.0.jar!/] for annotations
org.apache.tomcat.util.bcel.classfile.ClassFormatException: Invalid byte tag in constant pool: 19

以及

org.springframework.beans.factory.BeanCreationException: 
Error creating bean with name 'defaultValidator' defined in class path resource 
[org/springframework/boot/autoconfigure/validation/ValidationAutoConfiguration.class]: 
Bean instantiation via factory method failed; 
nested exception is org.springframework.beans.BeanInstantiationException: 
Failed to instantiate [org.springframework.validation.beanvalidation.LocalValidatorFactoryBean]: 
Factory method 'defaultValidator' threw exception; 
nested exception is java.lang.NoClassDefFoundError: javax/el/ELManager

本人使用的是：

springboot版本：2.0.3

Tomcat版本：7.0.65

经排查，是因为Tomcat版本原因，把Tomcat版本换成8.0.23之后可以正常启动。