eclipse 服务器不支持 J2EE Web 模块规范的 3.0 版
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The server does not support version 3.0 of the J2EE web module specification
提问by Hari
The server does not support version 3.0 of the J2EE web module specification.
服务器不支持 J2EE Web 模块规范的 3.0 版。
I am getting this error when I execute an application in Eclipse IDE. What is the reason for this?
在 Eclipse IDE 中执行应用程序时出现此错误。这是什么原因？
回答by Karim Oukara
right click on your project -> Properties --> project Facetsthen you must change Dynamic Web Modulefrom 3 to 2.5
右键单击您的project -> Properties --> project Facets然后您必须Dynamic Web Module从3 to 2.5
回答by Vineet Reynolds
The error message is quite understandable - you are attempting to execute an application that requires the server to support Servlet Spec 3.0 when it doesn't. You must therefore run the application on a server that complies with that version of the Servlet Specification.
错误消息很容易理解 - 您正在尝试执行一个需要服务器支持 Servlet Spec 3.0 的应用程序，但它不支持。因此，您必须在符合该版本 Servlet 规范的服务器上运行应用程序。
As far as I know you have the following options at your disposal, at the time of writing this:
据我所知，在撰写本文时，您可以选择以下选项：
- Apache Tomcat 7.0
- Glassfish 3.1
- IBM WebSphere 8
- JBoss 6 and 7
- Resin 4
- Apache Tomcat 7.0
- 玻璃鱼 3.1
- IBM WebSphere 8
- JBoss 6 和 7
- 树脂4
回答by bbreeden
The ...serverdef and plugin.xml configuration files for the server that you've set up in Eclipse define what versions of the specifications that the server supports.
您在 Eclipse 中设置的服务器的 ...serverdef 和 plugin.xml 配置文件定义了服务器支持的规范版本。
回答by Accollativo
From you web project try to downgrade the Dynamic Web Module: project -> Properties -> project Facets
从您的 web 项目尝试降级Dynamic Web Module：project -> Properties -> project Facets
If this has no effect, try to downgrade the EARfrom your EAR project: project -> Properties -> project Facets
如果这没有效果，请尝试EAR从您的 EAR 项目中降级：project -> Properties -> project Facets
If you can't change the versions from eclipse, edit manually the file org.eclipse.wst.common.project.facet.core.xml
如果您无法从 Eclipse 更改版本，请手动编辑该文件 org.eclipse.wst.common.project.facet.core.xml
