如何查看servlet&jsp版本？

1、进入tomcat的lib目录

2、找到 jsp-api.jar 和 servlet-api.jar两个jar包

3、复制出来，解压

4、进入META-INF目录，找到    MANIFEST.MF文件，记事本打开

servlet版本为4.0

Manifest-Version: 1.0
Ant-Version: Apache Ant 1.9.14
Bnd-LastModified: 1575736991076
Bundle-ManifestVersion: 2
Bundle-Name: tomcat-servlet-api
Bundle-SymbolicName: org.apache.tomcat-servlet-api
Bundle-Version: 9.0.30
Created-By: 1.8.0_232 (AdoptOpenJDK)
DSTAMP: 20191207
Export-Package: javax.servlet;uses:="javax.servlet.annotation,javax.se
 rvlet.descriptor",javax.servlet.annotation;uses:="javax.servlet",java
 x.servlet.descriptor,javax.servlet.http;uses:="javax.servlet",javax.s
 ervlet.resources
Import-Package: javax.servlet,javax.servlet.annotation,javax.servlet.d
 escriptor,org.apache.catalina.connector
Originally-Created-By: 1.8.0_232-b09 ()
Require-Capability: osgi.ee;filter:="(&(osgi.ee=JavaSE)(version=1.8))"
TODAY: December 7 2019
Tool: Bnd-4.2.0.201903051501
TSTAMP: 1642
X-Compile-Source-JDK: 8
X-Compile-Target-JDK: 8

Name: javax/servlet/
Implementation-Title: javax.servlet
Implementation-Vendor: Apache Software Foundation
Implementation-Version: 4.0.FR
Specification-Title: Java API for Servlets
Specification-Vendor: Sun Microsystems, Inc.
Specification-Version: 4.0

jsp版本为2.3

Name: javax/servlet/jsp/
Implementation-Title: javax.servlet.jsp
Implementation-Vendor: Apache Software Foundation
Implementation-Version: 2.3.FR
Specification-Title: Java API for JavaServer Pages
Specification-Vendor: Sun Microsystems, Inc.
Specification-Version: 2.3