struts的版本資訊檢視方法：

檢視 struts.jar\META-INF\MANIFEST.MF。再檢視 Implementation-Version，看後面的數字，也就是下列程式碼中的Implementation-Version：1.2.7

Manifest-Version: 1.0

Specification-Title: Struts Framework

Class-Path: commons-beanutils.jar commons-collections.jar commons-dig

ester.jar commons-fileupload.jar commons-logging.jar commons-validato

r.jar jakarta-oro.jar

Created-By: 1.3.1_04-b02 (Sun Microsystems Inc.)

Ant-Version: Apache Ant 1.6.1

Implementation-Title: Struts Framework

Specification-Version: 1.2.7

Specification-Vendor: The Apache Software Foundation

Implementation-Vendor-Id: org.apache

Extension-Name: Struts Framework

Implementation-Version: 1.2.7

Implementation-Vendor: The Apache Software Foundation