春季启动:找不到Javassist

本文介绍了春季启动:找不到Javassist的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我从弹簧启动开始，正在尝试在内存DB中编写一个与H2耦合的小型应用程序. 当我尝试运行应用程序时，出现 java.lang.ClassNotFoundException:javassist.bytecode.ClassFile 所以我猜到javassit jar在类路径中丢失了.我以调试模式启动了该应用程序，并且javassist-3.18.1-GA.jar存在于类路径中. 我当然会丢失一些东西，但我不知道是什么.

I'm starting with spring boot and I'm trying to write a small application coupled with an H2 in memory DB. When I'm trying to run my application I've got java.lang.ClassNotFoundException: javassist.bytecode.ClassFile So I gueesed javassit jar was missing on the classpath. I started the application in debug mode and javassist-3.18.1-GA.jar is present in the classpath. I'm certainly missing something but I can't figure out what.

这是我的POM文件的内容

here is the content of my POM file

<parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.3.1.BUILD-SNAPSHOT</version> </parent> <!-- Additional lines to be added here... --> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-devtools</artifactId> <optional>true</optional> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-jpa</artifactId> </dependency> <dependency> <groupId>com.h2database</groupId> <artifactId>h2</artifactId> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> <properties> <java.version>1.8</java.version> </properties> <!-- (you don't need this if you are using a .RELEASE version) --> <repositories> <repository> <id>spring-snapshots</id> <url>repo.spring.io/snapshot</url> <snapshots><enabled>true</enabled></snapshots> </repository> <repository> <id>spring-milestones</id> <url>repo.spring.io/milestone</url> </repository> </repositories> <pluginRepositories> <pluginRepository> <id>spring-snapshots</id> <url>repo.spring.io/snapshot</url> </pluginRepository> <pluginRepository> <id>spring-milestones</id> <url>repo.spring.io/milestone</url> </pluginRepository> </pluginRepositories>

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.<init>(EntityManagerFactoryBuilderImpl.java:221) ~[hibernate-entitymanager-4.3.11.Final.jar:4.3.11.Final] at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.<init>(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.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添加依赖项不能解决信息问题.

adding a dependency to javassist doesn't solve the problem for info.

推荐答案

这是maven依赖项的问题.转到您的.m2文件夹，然后删除javassist文件夹.然后更新您的Maven依赖项，它将起作用.我遇到了同样的问题，对我有用

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