Spring boot：找不到javassist
我从弹簧启动开始，我正在尝试在内存DB中编写一个小型应用程序和H2。
当我试图运行我的应用程序时，我有java.lang.ClassNotFoundException：javassist.bytecode.ClassFile所以我猜测类路径上缺少javassit jar。 我在调试模式下启动了应用程序，并且类路径中存在javassist-3.18.1-GA.jar。
我当然错过了一些东西，但我无法弄清楚是什么。
这是我的POM文件的内容
org.springframework.boot spring-boot-starter-parent 1.3.1.BUILD-SNAPSHOT org.springframework.boot spring-boot-starter-web org.springframework.boot spring-boot-devtools true org.springframework.boot spring-boot-starter-data-jpa com.h2database h2 org.springframework.boot spring-boot-maven-plugin 1.8 spring-snapshots http://repo.spring.io/snapshot true spring-milestones http://repo.spring.io/milestone spring-snapshots http://repo.spring.io/snapshot spring-milestones http://repo.spring.io/milestone 这是我的应用程序主类
@Configuration @EnableAutoConfiguration @ComponentScan public class Application { public static void main(String[] args) throws Exception{ SpringApplication.run(Application.class, args); } }
这是堆栈跟踪
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJp aAutoConfiguration.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) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:545) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1051) ~[spring-context-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:828) ~[spring-context-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:537) ~[spring-context-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:118) ~[spring-boot-1.3.1.BUILD-SNAPSHOT.jar:1.3.1.BUILD-SNAPSHOT] at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:752) [spring-boot-1.3.1.BUILD-SNAPSHOT.jar:1.3.1.BUILD-SNAPSHOT] at org.springframework.boot.SpringApplication.doRun(SpringApplication.java:347) [spring-boot-1.3.1.BUILD-SNAPSHOT.jar:1.3.1.BUILD-SNAPSHOT] at org.springframework.boot.SpringApplication.run(SpringApplication.java:295) [spring-boot-1.3.1.BUILD-SNAPSHOT.jar:1.3.1.BUILD-SNAPSHOT] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1112) [spring-boot-1.3.1.BUILD-SNAPSHOT.jar:1.3.1.BUILD-SNAPSHOT] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1101) [spring-boot-1.3.1.BUILD-SNAPSHOT.jar:1.3.1.BUILD-SNAPSHOT] at com.practice.songbook.Application.main(Application.java:17) [classes/:na] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_65] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_65] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_65] at java.lang.reflect.Method.invoke(Method.java:497) ~[na:1.8.0_65] at org.springframework.boot.maven.AbstractRunMojo$LaunchRunner.run(AbstractRunMojo.java:467) [spring-boot-maven-plugin-1.3.1.BUILD-SNAPSHOT.jar:1.3.1.BUILD-SNAPSHOT] at java.lang.Thread.run(Thread.java:745) [na:1.8.0_65] Caused by: java.lang.NoClassDefFoundError: javassist/bytecode/ClassFile at org.hibernate.jpa.boot.scan.spi.ClassFileArchiveEntryHandler.toClassFile(ClassFileArchiveEntryHandler.java:85) ~[hibernate-entitymanager-4.3.11.Final.jar:4.3.11.Final] at org.hibernate.jpa.boot.scan.spi.ClassFileArchiveEntryHandler.handleEntry(ClassFileArchiveEntryHandler.java:65) ~[hibernate-entitymanager-4.3.11.Final.jar:4.3.11.Final] at org.hibernate.jpa.boot.archive.internal.ExplodedArchiveDescriptor.processDirectory(ExplodedArchiveDescriptor.java:167) ~[hibernate-entitymanager-4.3.11.Final.jar:4.3.11.Final] at org.hibernate.jpa.boot.archive.internal.ExplodedArchiveDescriptor.processDirectory(ExplodedArchiveDescriptor.java:142) ~[hibernate-entitymanager-4.3.11.Final.jar:4.3.11.Final] at org.hibernate.jpa.boot.archive.internal.ExplodedArchiveDescriptor.processDirectory(ExplodedArchiveDescriptor.java:142) ~[hibernate-entitymanager-4.3.11.Final.jar:4.3.11.Final] at org.hibernate.jpa.boot.archive.internal.ExplodedArchiveDescriptor.processDirectory(ExplodedArchiveDescriptor.java:142) ~[hibernate-entitymanager-4.3.11.Final.jar:4.3.11.Final] at org.hibernate.jpa.boot.archive.internal.ExplodedArchiveDescriptor.visitArchive(ExplodedArchiveDescriptor.java:78) ~[hibernate-entitymanager-4.3.11.Final.jar:4.3.11.Final] at org.hibernate.jpa.boot.scan.spi.AbstractScannerImpl.scan(AbstractScannerImpl.java:72) ~[hibernate-entitymanager-4.3.11.Final.jar:4.3.11.Final] at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.scan(EntityManagerFactoryBuilderImpl.java:725) ~[hibernate-entitymanager-4.3.11.Final.jar:4.3.11.Final] at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.(EntityManagerFactoryBuilderImpl.java:221) ~[hibernate-entitymanager-4.3.11.Final.jar:4.3.11.Final] at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.(EntityManagerFactoryBuilderImpl.java:188) ~[hibernate-entitymanager-4.3.11.Final.jar:4.3.11.Final] at org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.createContainerEntityManagerFactory(SpringHibernateJpaPersistenceProvider.java:54) ~[spring-orm-4.2.3.RELEASE.jar:4. 2.3.RELEASE] at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:343) ~[spring-orm-4.2.3.RELEASE.jar:4.2.3.REL EASE] at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:318) ~[spring-orm-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1637) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1574) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE] ... 22 common frames omitted Caused by: java.lang.ClassNotFoundException: javassist.bytecode.ClassFile at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[na:1.8.0_65] at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_65] at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_65] ... 38 common frames omitted
向javassist添加依赖项并不能解决信息问题。
它是maven依赖的问题。 转到.m2文件夹并清除javassist的de文件夹。 然后更新你的maven依赖项，它会工作。 我有同样的问题，它对我有用
您应该添加javassist作为依赖项之一。
org.javassist javassist ${javassist.version}
我终于解决了这个问题。 我在尝试运行springboot jpa示例时遇到了完全相同的问题，并决定清理我的maven存储库以从头开始。 我的作品知道了。 我不确定最初的问题是什么。
我认为你缺少这种依赖：org.springframework.boot spring-boot-starter-data-jpa