class jdk.internal.loader.ClassLoaders$AppClassLoader cannot be cast to class java.net.URLClassLoade

忘是亡心i 2022-11-30 12:51 217阅读 0赞

在码云上下载的另一个springboot项目，启动报错：`class jdk.internal.loader.ClassLoaders$AppClassLoader cannot be cast to class java.net.URLClassLoader (jdk.internal.loader.ClassLoaders$AppClassLoader and java.net.URLClassLoader are in module java.base of loader 'bootstrap')`

**解决方案：**

*  将pom.xml中的热部署依赖去掉（或注释掉）

<dependency>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-devtools</artifactId>
       <optional>true</optional>
       <scope>true</scope>
    </dependency>

*  将SpringBoot版本升到2.x版本：  
    修改前：

<parent>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-parent</artifactId>
            <version>1.5.9.RELEASE</version>
            <relativePath/> 
        </parent>

修改后：

<parent>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-parent</artifactId>
            <version>2.1.3.RELEASE</version>
            <relativePath/>
        </parent>

**总结**：将项目中的热部署依赖注释，并将springboot由原来的1.5.9升级到2.1.3后，该问题解决。

**原文链接：**

*  [https://blog.csdn.net/qq\_40722208/article/details/105287695][https_blog.csdn.net_qq_40722208_article_details_105287695]

[https_blog.csdn.net_qq_40722208_article_details_105287695]: https://blog.csdn.net/qq_40722208/article/details/105287695

class jdk.internal.loader.ClassLoaders$AppClassLoader cannot be cast to class java.net.URLClassLoade

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