檢視servlet版本，jsp版本
在伺服器的安裝目錄裡檢視，例如開啟Tomcat的安裝目錄
方法：開啟tomcat/lib，找到jsp-api.jar和servlet-api.jar。解壓這兩個檔案，找到META-INF下的MANIFEST.MF檔案。用記事本或者EditPlus一類的軟體開啟。
我的JSP版本是：
Manifest-Version: 1.0
Ant-Version: Apache Ant 1.8.2
Created-By: 1.6.0_29-b11 (Sun Microsystems Inc.)
X-Compile-Source-JDK: 1.6
X-Compile-Target-JDK: 1.6
Name: javax/servlet/jsp/
Specification-Title: Java API for JavaServer Pages
Specification-Version: 2.2
Specification-Vendor: Sun Microsystems, Inc.
Implementation-Title: javax.servlet.jsp
Implementation-Version: 2.2.FR
Implementation-Vendor: Apache Software Foundation
我的servlet版本是：
Manifest-Version: 1.0
Ant-Version: Apache Ant 1.8.2
Created-By: 1.6.0_29-b11 (Sun Microsystems Inc.)
X-Compile-Source-JDK: 1.6
X-Compile-Target-JDK: 1.6
Name: javax/servlet/
Specification-Title: Java API for Servlets
Specification-Version: 3.0
Specification-Vendor: Sun Microsystems, Inc.
Implementation-Title: javax.servlet
Implementation-Version: 3.0.FR
Implementation-Vendor: Apache Software Foundation