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

小鱼儿 2024-03-16 18:40 60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。

***************************
    APPLICATION FAILED TO START
    ***************************
    
    Description:
    
    An attempt was made to call a method that does not exist. The attempt was made from the following location:
    
        org.apache.catalina.authenticator.AuthenticatorBase.startInternal(AuthenticatorBase.java:1319)
    
    The following method did not exist:
    
        javax.servlet.ServletContext.getVirtualServerName()Ljava/lang/String;
    
    The method's class, javax.servlet.ServletContext, is available from the following locations:
    
        jar:file:/I:/apache-maven-3.5.0/repo/javax/servlet/servlet-api/2.5/servlet-api-2.5.jar!/javax/servlet/ServletContext.class
        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
        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
    
    The class hierarchy was loaded from the following locations:
    
        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

<dependency>
                <groupId>org.apache.tomcat.embed</groupId>
                <artifactId>tomcat-embed-core</artifactId>
            </dependency>

重新加载项目，再启动，结果正常启动

[35c15132efd84336b6470e80ec97e4a4.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/15/563e74080a9e4eea9466da1cb47ca549.png
[f35ebcdfd1964d04b814bdb9333ab862.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/15/e84b424c0905449b8820dbeaa7f3c8e7.png