J2EE 环境常见错误

Tomcat java.lang.NoClassDefFoundError: javax/servlet/Filter when trying to publish a Struts2 Dynamic Web App

<dependency>
  <groupId>javax.servlet</groupId>
  <artifactId>javax.servlet-api</artifactId>
  <version>3.0.1</version>
  <scope>provided</scope>
</dependency>

Unable to load configuration. - bean - jar:file:/C:/Users/Jon/.m2/repository/org/apache/struts/struts2-core/2.1.8.1/struts2-core-2.1.8.1.jar!/struts-default.xml:59:150

<dependency>
  <groupId>org.apache.struts.xwork</groupId>
  <artifactId>xwork-core</artifactId>
  <version>2.3.16</version>
</dependency>

java.lang.NoSuchMethodError: javax.servlet.ServletContext.getContextPath
多个maven引用的servlet-api与tomcat中的servlet-api冲突

<dependency>
  <groupId>javax.servlet</groupId>
  <artifactId>servlet-api</artifactId>
  <version>2.4</version>
</dependency>