如何知道一款Tomcat支持哪个Servlet/JSP版本？
打开tomcat的库目录（lib）下，有两个JAR文件： jsp-api.jar servlet-api.jar 。如果没有，那可能是你没有添加进来。解压这两个文件，用记事本分别打开META-INF下的MAINMEFT.MF文件。apache-tomcat-6.0.36的这两个文件的全部内容分别如下：第一个文件：
Manifest-Version: 1.0
Ant-Version: Apache Ant 1.7.0
Created-By: 1.5.0_15-b04 (Sun Microsystems Inc.)
X-Compile-Source-JDK: 1.5
X-Compile-Target-JDK: 1.5
Name: javax/servlet/
Specification-Title: Java API for Servlets
Specification-Version: 2.5
Specification-Vendor: Sun Microsystems, Inc.
Implementation-Title: javax.servlet
Implementation-Version: 2.5.MR2
Implementation-Vendor: Apache Software Foundation
第二个文件内容：
Manifest-Version: 1.0
Ant-Version: Apache Ant 1.7.0
Created-By: 1.5.0_15-b04 (Sun Microsystems Inc.)
X-Compile-Source-JDK: 1.5
X-Compile-Target-JDK: 1.5
Name: javax/servlet/jsp/
Specification-Title: Java API for JavaServer Pages
Specification-Version: 2.1
Specification-Vendor: Sun Microsystems, Inc.
Implementation-Title: javax.servlet.jsp
Implementation-Version: 2.1.FR
Implementation-Vendor: Apache Software Foundation
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