ServletDispatcher 无法在我的 spring 项目中强制转换为 Javax.servlet.Servlet 异常 [英] ServletDispatcher cannot be cast to Javax.servlet.Servlet exception in my spring project

问题描述

启动tomcat服务器时出现异常

While starting tomcat server I am getting an exception

SEVERE: Servlet /MavenWeb threw load() exception
java.lang.ClassCastException: org.springframework.web.servlet.DispatcherServlet
cannot be cast to javax.servlet.Servlet

我正在使用 spring3，但我的 lib 文件夹中有 jar spring2-5-6，我从 pom.xml 中删除了它，但仍然出现在 lib 文件夹中 - 尽管我不确定这是否是一个问题.我正在使用 Eclipse IDE.谢谢！！

I am using spring3 but there is jar spring2-5-6 in my lib folder, I removed it from pom.xml but still appears in lib folder - though I am not sure if that is an issue. I am using Eclipse IDE. Thanks!!

<dependencies>
    <dependency>
      <groupId>org.hibernate.javax.persistence</groupId>
      <artifactId>hibernate-jpa-2.1-api</artifactId>
      <version>1.0.0.Draft-6</version>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>org.hibernate</groupId>
      <artifactId>hibernate-annotations</artifactId>
      <version>3.5.6-Final</version>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-beans</artifactId>
      <version>3.1.2.RELEASE</version>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>3.1.2.RELEASE</version>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-web</artifactId>
      <version>3.1.2.RELEASE</version>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-tx</artifactId>
      <version>3.1.2.RELEASE</version>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>3.1.2.RELEASE</version>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>javax.servlet-api</artifactId>
      <version>3.1-b01</version>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webflow</artifactId>
      <version>1.0.6</version>
      <scope>compile</scope>
    </dependency>
  </dependencies>

推荐答案

您不应该在一个项目中使用多个版本的 Spring JAR，但这不是问题.

You shouldn't be using multiple versions of Spring JARs in one project, but this is not the issue.

该问题很可能是由两个不同的类加载器加载的 servlet API 类引起的.可能您的 WAR 中有 servlet*.jar 或其他一些特定于容器的 JAR.通过在 pom.xml 中将它们的 设置为 provided 来删除它们.

The problem is most likely caused by servlet API classes loaded by two different class-loaders. Probably you have servlet*.jar or some other container-specific JARs in your WAR. Remove them by setting their <scope> to provided in pom.xml.

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