我如何知道我拥有的 servlet-api.jar 版本是什么？

发布于 2024-09-27 01:51:52 字数 314 浏览 2 评论 0原文

我从 java2s.com 下载了 servlet-api.jar 的副本。我怎么知道它是什么版本？网站上没有任何参考。

编辑

啊。抱歉。当我双击我得到的 jar 中的 MANIFEST.MF 文件时，我应该列出写字板输出的内容：

Manifest-Version: 1.0
Ant-Version: Apache Ant 1.6.5
Created-By: 1.5.0_06-b05 (Sun Microsystems Inc.)

如您所见，它没有告诉我版本，因此出现了问题。

原文

I downloaded a copy of servlet-api.jar from java2s.com. How do I know what version it is? There's no reference on the site.

EDIT

Ah. Apologies. I should have listed the content of the wordpad output when I double clicked on the MANIFEST.MF file in the jar I got:

Manifest-Version: 1.0
Ant-Version: Apache Ant 1.6.5
Created-By: 1.5.0_06-b05 (Sun Microsystems Inc.)

As you can see it didnt tell me the version hence the question.

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萤火眠眠 2024-10-04 01:51:52

使用下面的代码片段：

<%= session.getServletContext().getMajorVersion() %>.
<%= session.getServletContext().getMinorVersion() %>

use the below code snippet :

<%= session.getServletContext().getMajorVersion() %>.
<%= session.getServletContext().getMinorVersion() %>

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纵山崖 2024-10-04 01:51:52

你可以从 META-INF 获取它，你可以使用 win rar 或类似的归档工具来探索 jar 文件的内容。

Name: javax/servlet/
Specification-Title: Java API for Servlets
Specification-Version: 2.4

我个人更喜欢从 maven repo 下载 jar。

you can get it from META-INF, you can explore the content of jar file using win rar or such archiving utils something like.

Name: javax/servlet/
Specification-Title: Java API for Servlets
Specification-Version: 2.4

I personally prefer maven repo to download jar from.

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染柒℉ 2024-10-04 01:51:52

您可以使用 tomcat 附带的版本 2.4 的清单从 jar 文件的 META-INF 目录中提取 MANIFEST.MF，

jar xf servlet-api.jar META-INF/MANIFEST.MF

如下所示

Manifest-Version: 1.0
Ant-Version: Apache Ant 1.6.2
Created-By: 1.4.2_06-b03 (Sun Microsystems Inc.)

Name: javax/servlet/
Specification-Title: Java API for Servlets
Specification-Version: 2.4
Specification-Vendor: Sun Microsystems, Inc.
Implementation-Title: javax.servlet
Implementation-Version: 2.4.public_draft
Implementation-Vendor: Apache Software Foundation

you can extract the MANIFEST.MF from the META-INF directory of your jar file by using

jar xf servlet-api.jar META-INF/MANIFEST.MF

the manifest for version 2.4 that comes with tomcat looks like this for example

Manifest-Version: 1.0
Ant-Version: Apache Ant 1.6.2
Created-By: 1.4.2_06-b03 (Sun Microsystems Inc.)

Name: javax/servlet/
Specification-Title: Java API for Servlets
Specification-Version: 2.4
Specification-Vendor: Sun Microsystems, Inc.
Implementation-Title: javax.servlet
Implementation-Version: 2.4.public_draft
Implementation-Vendor: Apache Software Foundation

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白首有我共你 2024-10-04 01:51:52

它基本上位于 /META-INF/MANIFEST.MF 下 JAR 的 MANIFEST 文件内：

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

It's basically inside your JAR's MANIFEST file under /META-INF/MANIFEST.MF:

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

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