获取NoSuchMethodError：javax.servlet.ServletContext.getVirtualServerName（） [英] Getting NoSuchMethodError:javax.servlet.ServletContext.getVirtualServerName()

问题描述

我在Tomcat 8中部署服务时遇到问题。出现以下错误：

I am facing an issue during deployment of a service in Tomcat 8. Getting following error :

引起：java.lang。 NoSuchMethodError：
javax.servlet.ServletContext.getVirtualServerName（）Ljava / lang / String;
at org.apache.tomcat.websocket.server.WsServerContainer。（WsServerContainer.java:149）
at org.apache.tomcat.websocket.server.WsSci.init（WsSci.java:131）
at org.apache.tomcat.websocket.server.WsSci.onStartup（WsSci.java:47）
at org.apache.catalina.core.StandardContext.startInternal（StandardContext.java:5244)
org.apache.catalina.util.LifecycleBase.start（LifecycleBase.java:150）
... 10 more

Caused by: java.lang.NoSuchMethodError: javax.servlet.ServletContext.getVirtualServerName()Ljava/lang/String; at org.apache.tomcat.websocket.server.WsServerContainer.(WsServerContainer.java:149) at org.apache.tomcat.websocket.server.WsSci.init(WsSci.java:131) at org.apache.tomcat.websocket.server.WsSci.onStartup(WsSci.java:47) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5244) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) ... 10 more

方法 getVirtualServerName 是在Servlet 3.1中引入的，并在从我的 servlet中解压缩 MANIFEST.MF 之后-api jar我得到了以下详细信息：

Method getVirtualServerName was introduced in Servlet 3.1 and after extracting MANIFEST.MF from my servlet-api jar I got following details :

Specification-Title: Java API for Servlets 
Specification-Version: 3.1 
Specification-Vendor: Sun Microsystems, Inc. 
Implementation-Title: javax.servlet 

其中说它有3.1。那么这个错误还有其他原因吗？请帮助

Which says that its having 3.1. So is there any other reason for this error? Please help

推荐答案

检查所有Maven（或等效的）依赖项并确保您 - 或者很可能是另一个依赖项 - 不是拉入3.1版本的 javax.servlet / servlet-api ，它可能优先于你的Tomcat 8中的内容。如果你手动部署，请确保你没有手动将任何servlet-api JAR复制到Tomcat本身。

Check all your Maven (or equivalent) dependencies and make sure that you - or most likely another dependency - are not pulling in a pre-3.1 version of the javax.servlet / servlet-api that may be taking precedence over what's in your Tomcat 8. If you've manually deployed, make sure you haven't manually copied any servlet-api JARs into Tomcat itself.

参见： https://stackoverflow.com/a/26232535/954442

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