SpringBoot启动报错：Caused by: java.lang.NoClassDefFoundError: javassist/bytecode/ClassFile

客官°小女子只卖身不卖艺 2022-05-31 04:05 250阅读 0赞

SpringBoot项目启动报错：大致信息如下：

2018-02-06 16:40:39,878 ERROR SpringApplication:827 - Application startup failed  
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource \[org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaAutoConfiguration.class\]: Invocation of init method failed; nested exception is java.lang.NoClassDefFoundError: javassist/bytecode/ClassFile  
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1578)  
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:545)  
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482)  
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)  
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)  
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)  
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)  
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1054)  
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:829)  
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:538)  
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:118)  
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:766)  
at org.springframework.boot.SpringApplication.createAndRefreshContext(SpringApplication.java:361)  
at org.springframework.boot.SpringApplication.run(SpringApplication.java:307)  
at org.springframework.boot.builder.SpringApplicationBuilder.run(SpringApplicationBuilder.java:134)  
at com.springboot.cfx.SpringBootSampleApplication.main(SpringBootSampleApplication.java:19)  
Caused by: java.lang.NoClassDefFoundError: javassist/bytecode/ClassFile

解决方案：

去maven库中把 javassist文件夹删除，然后右击pom.xml文件，选择“run as”——》“Maven generate-source”，然后运行项目。

前后依赖包中的对比图如下：

更新前：

![SouthEast][]

更新后：

![SouthEast 1][]

参照网址：[https://stackoverflow.com/questions/33899791/spring-boot-javassist-not-found][https_stackoverflow.com_questions_33899791_spring-boot-javassist-not-found]

Its a problem with maven dependencies. Go to your .m2 folder and erase de folder of javassist. Then update your maven dependencies and it's gonna work. I had the same problem, and it works to me

[SouthEast]: /images/20220531/6630b5ca537644308e930dba11b7af66.png
[SouthEast 1]: /images/20220531/e1957575d75f49b4897e60582b06a01b.png
[https_stackoverflow.com_questions_33899791_spring-boot-javassist-not-found]: https://stackoverflow.com/questions/33899791/spring-boot-javassist-not-found