参考链接

he identifier [class] is not a valid Java identifier as required by section 1.19

正文

The identifier [class] is not a valid Java identifier as required by section 
1.19 of the EL specification (Identifier ::= Java language identifier). This 
check can be disabled by setting the system property 
org.apache.el.parser.SKIP_IDENTIFIER_CHECK to true.

解决方案： tomcat/conf/catalina.properties文件最后加上
org.apache.el.parser.SKIP_IDENTIFIER_CHECK=true