在Tomcat内部运行Camel应用程序时，我在CamelServlet实现上得到一个ClassCastException

Question

我有一个使用servlet公开REST API的Camel应用程序。我用SpringBoot和Camel一起。在构建WAR之后，我可以使用java-jar运行它，它工作得很好。现在，当我将相同的WAR部署到Tomcat/WebApps中时，日志中会出现以下错误：

    java.lang.ClassCastException: class org.apache.camel.component.servlet.CamelHttpTransportServlet cannot be cast to class jakarta.servlet.Servlet (org.apache.camel.component.servlet.CamelHttpTransportServlet is in unnamed module of loader org.apache.catalina.loader.ParallelWebappClassLoader @4f2613d1; jakarta.servlet.Servlet is in unnamed module of loader java.net.URLClassLoader @520a3426)

这是我的web.xml

<?xml version="1.0" encoding="ISO-8859-1"?>

<web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">

  <servlet>
    <servlet-name>CamelServlet</servlet-name>
    <servlet-class>
        org.apache.camel.component.servlet.CamelHttpTransportServlet
    </servlet-class>
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet>
    <servlet-name>SpringApplicationContext</servlet-name>
    <servlet-class>
        org.springframework.web.context.ContextLoaderServlet
    </servlet-class>
    <load-on-startup>2</load-on-startup>
  </servlet>
  <!-- Camel servlet mapping -->
  <servlet-mapping>
    <servlet-name>CamelServlet</servlet-name>
    <url-pattern>/srv/*</url-pattern>
  </servlet-mapping>
</web-app>

Answer 1

使用Tomcat9解决了这个问题