At least one JAR was scanned for TLDs yet contained no TLDs.

INFO:
At least one JAR was scanned for TLDs yet contained no TLDs.
Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them.
Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.

原因：

1：页面中含有注释。

2：tomcat 7对EL表达式的语法要求比较严格，包含关JAVA键字就会导致解析出错。

解决方案：

修改tomcat属性，忽略对EL表达式的关键字检查。修改tomcat 下/conf/catalina.properties文件，添加org.apache.el.parser.SKIP_IDENTIFIER_CHECK=true选项。