java -- 异常 The class hierarchy was loaded from the following locations:

小鱼儿 2024-03-16 18:40 145阅读 0赞

背景：

最近做一个项目，代码是maven 多模块的，新增了一个模块，代码新增完启动发现报错。

  1. ***************************
  2. APPLICATION FAILED TO START
  3. ***************************
  5. Description:
  7. An attempt was made to call a method that does not exist. The attempt was made from the following location:
  9.     org.apache.catalina.authenticator.AuthenticatorBase.startInternal(AuthenticatorBase.java:1319)
  11. The following method did not exist:
  13.     javax.servlet.ServletContext.getVirtualServerName()Ljava/lang/String;
  15. The method's class, javax.servlet.ServletContext, is available from the following locations:
  17.     jar:file:/I:/apache-maven-3.5.0/repo/javax/servlet/servlet-api/2.5/servlet-api-2.5.jar!/javax/servlet/ServletContext.class
  18.     jar:file:/I:/apache-maven-3.5.0/repo/javax/servlet/javax.servlet-api/4.0.1/javax.servlet-api-4.0.1.jar!/javax/servlet/ServletContext.class
  19.     jar:file:/I:/apache-maven-3.5.0/repo/org/apache/tomcat/embed/tomcat-embed-core/9.0.63/tomcat-embed-core-9.0.63.jar!/javax/servlet/ServletContext.class
  21. The class hierarchy was loaded from the following locations:
  23.     javax.servlet.ServletContext: file:/I:/apache-maven-3.5.0/repo/javax/servlet/servlet-api/2.5/servlet-api-2.5.jar

35c15132efd84336b6470e80ec97e4a4.png

一开始我以为是缺了servlet-api-2.5.jar 这个jar包，后面发现本地目录下是有这个包的

原因：

原来是因为在主模块中启动类已经有个启动类，springboot有内置的tomcat，我新增模块的时候导入了web基础依赖，导致两者的servlet冲突了

f35ebcdfd1964d04b814bdb9333ab862.png

解决：

删除上述多余依赖

  1. <dependency>
  2.             <groupId>org.apache.tomcat.embed</groupId>
  3.             <artifactId>tomcat-embed-core</artifactId>
  4.         </dependency>

重新加载项目，再启动，结果正常启动

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