那些遇到过的问题

切换到Java 9时,带有Spring Boot的javax.xml.bind.JAXBException的ClassNotFoundException

Raj*_*jat 18 java spring spring-boot java-9

使用start.spring.io初始化项目

添加了WEB,JPA,H2依赖项,然后尝试运行MainApplication.java使用Jdk 9并获得以下错误日志

  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::       (v1.5.10.RELEASE)

2018-02-26 16:23:33.973  INFO 3860 --- [           main] com.example.demo.DemoApplication         : Starting DemoApplication v0.0.1-SNAPSHOT on RAJAT-PC with PID 3860 (C:\Users\devra\Downloads\Compressed\demo\target\demo-0.0.1-SNAPSHOT.jar started by rajat in C:\Users\devra\Downloads\Compressed\demo\target)
2018-02-26 16:23:33.973  INFO 3860 --- [           main] com.example.demo.DemoApplication         : No active profile set, falling back to default profiles: default
2018-02-26 16:23:34.254  INFO 3860 --- [           main] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@1aa7ecca: startup date [Mon Feb 26 16:23:34 IST 2018]; root of context hierarchy
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.springframework.cglib.core.ReflectUtils$1 (jar:file:/C:/Users/devra/Downloads/Compressed/demo/target/demo-0.0.1-SNAPSHOT.jar!/BOOT-INF/lib/spring-core-4.3.14.RELEASE.jar!/) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int,java.security.ProtectionDomain)
WARNING: Please consider reporting this to the maintainers of org.springframework.cglib.core.ReflectUtils$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
2018-02-26 16:23:38.429  INFO 3860 --- [           main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration' of type [org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration$$EnhancerBySpringCGLIB$$1c55a85e] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2018-02-26 16:23:39.856  INFO 3860 --- [           main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat initialized with port(s): 8080 (http)
2018-02-26 16:23:39.888  INFO 3860 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
2018-02-26 16:23:39.903  INFO 3860 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet Engine: Apache Tomcat/8.5.27
2018-02-26 16:23:40.247  INFO 3860 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2018-02-26 16:23:40.247  INFO 3860 --- [ost-startStop-1] o.s.web.context.ContextLoader            : Root WebApplicationContext: initialization completed in 6024 ms
2018-02-26 16:23:40.622  INFO 3860 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'characterEncodingFilter' to: [/*]
2018-02-26 16:23:40.622  INFO 3860 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
2018-02-26 16:23:40.622  INFO 3860 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'httpPutFormContentFilter' to: [/*]
2018-02-26 16:23:40.622  INFO 3860 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'requestContextFilter' to: [/*]
2018-02-26 16:23:40.622  INFO 3860 --- [ost-startStop-1] .s.DelegatingFilterProxyRegistrationBean : Mapping filter: 'springSecurityFilterChain' to: [/*]
2018-02-26 16:23:40.622  INFO 3860 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean  : Mapping servlet: 'dispatcherServlet' to [/]
2018-02-26 16:23:40.622  INFO 3860 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean  : Mapping servlet: 'webServlet' to [/h2-console/*]
2018-02-26 16:23:42.200  INFO 3860 --- [           main] j.LocalContainerEntityManagerFactoryBean : Building JPA container EntityManagerFactory for persistence unit 'default'
2018-02-26 16:23:42.263  INFO 3860 --- [           main] o.hibernate.jpa.internal.util.LogHelper  : HHH000204: Processing PersistenceUnitInfo [
        name: default
        ...]
2018-02-26 16:23:42.591  INFO 3860 --- [           main] org.hibernate.Version                    : HHH000412: Hibernate Core {5.0.12.Final}
2018-02-26 16:23:42.607  INFO 3860 --- [           main] org.hibernate.cfg.Environment            : HHH000206: hibernate.properties not found
2018-02-26 16:23:42.607  INFO 3860 --- [           main] org.hibernate.cfg.Environment            : HHH000021: Bytecode provider name : javassist
2018-02-26 16:23:42.653  WARN 3860 --- [           main] ationConfigEmbeddedWebApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: 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: javax/xml/bind/JAXBException
2018-02-26 16:23:42.669  INFO 3860 --- [           main] o.apache.catalina.core.StandardService   : Stopping service [Tomcat]
2018-02-26 16:23:42.716  INFO 3860 --- [           main] utoConfigurationReportLoggingInitializer :

Error starting ApplicationContext. To display the auto-configuration report re-run your application with 'debug' enabled.
2018-02-26 16:23:42.747 ERROR 3860 --- [           main] o.s.boot.SpringApplication               : 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: javax/xml/bind/JAXBException
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1628) ~[spring-beans-4.3.14.RELEASE.jar!/:4.3.14.RELEASE]
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:555) ~[spring-beans-4.3.14.RELEASE.jar!/:4.3.14.RELEASE]
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483) ~[spring-beans-4.3.14.RELEASE.jar!/:4.3.14.RELEASE]
        at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.3.14.RELEASE.jar!/:4.3.14.RELEASE]
        at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.3.14.RELEASE.jar!/:4.3.14.RELEASE]
        at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.3.14.RELEASE.jar!/:4.3.14.RELEASE]
        at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.3.14.RELEASE.jar!/:4.3.14.RELEASE]
        at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1080) ~[spring-context-4.3.14.RELEASE.jar!/:4.3.14.RELEASE]
        at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:857) ~[spring-context-4.3.14.RELEASE.jar!/:4.3.14.RELEASE]
        at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:543) ~[spring-context-4.3.14.RELEASE.jar!/:4.3.14.RELEASE]
        at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122) ~[spring-boot-1.5.10.RELEASE.jar!/:1.5.10.RELEASE]
        at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:693) [spring-boot-1.5.10.RELEASE.jar!/:1.5.10.RELEASE]
        at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:360) [spring-boot-1.5.10.RELEASE.jar!/:1.5.10.RELEASE]
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:303) [spring-boot-1.5.10.RELEASE.jar!/:1.5.10.RELEASE]
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:1118) [spring-boot-1.5.10.RELEASE.jar!/:1.5.10.RELEASE]
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:1107) [spring-boot-1.5.10.RELEASE.jar!/:1.5.10.RELEASE]
        at com.example.demo.DemoApplication.main(DemoApplication.java:10) [classes!/:0.0.1-SNAPSHOT]
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na]
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
        at java.base/java.lang.reflect.Method.invoke(Method.java:564) ~[na:na]
        at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:48) [demo-0.0.1-SNAPSHOT.jar:0.0.1-SNAPSHOT]
        at org.springframework.boot.loader.Launcher.launch(Launcher.java:87) [demo-0.0.1-SNAPSHOT.jar:0.0.1-SNAPSHOT]
        at org.springframework.boot.loader.Launcher.launch(Launcher.java:50) [demo-0.0.1-SNAPSHOT.jar:0.0.1-SNAPSHOT]
        at org.springframework.boot.loader.JarLauncher.main(JarLauncher.java:51) [demo-0.0.1-SNAPSHOT.jar:0.0.1-SNAPSHOT]
Caused by: java.lang.NoClassDefFoundError: javax/xml/bind/JAXBException
        at org.hibernate.boot.spi.XmlMappingBinderAccess.<init>(XmlMappingBinderAccess.java:43) ~[hibernate-core-5.0.12.Final.jar!/:5.0.12.Final]
        at org.hibernate.boot.MetadataSources.<init>(MetadataSources.java:87) ~[hibernate-core-5.0.12.Final.jar!/:5.0.12.Final]
        at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.<init>(EntityManagerFactoryBuilderImpl.java:179) ~[hibernate-entitymanager-5.0.12.Final.jar!/:5.0.12.Final]
        at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.<init>(EntityManagerFactoryBuilderImpl.java:149) ~[hibernate-entitymanager-5.0.12.Final.jar!/:5.0.12.Final]
        at org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.createContainerEntityManagerFactory(SpringHibernateJpaPersistenceProvider.java:54) ~[spring-orm-4.3.14.RELEASE.jar!/:4.3.14.RELEASE]
        at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:360) ~[spring-orm-4.3.14.RELEASE.jar!/:4.3.14.RELEASE]
        at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory(AbstractEntityManagerFactoryBean.java:382) ~[spring-orm-4.3.14.RELEASE.jar!/:4.3.14.RELEASE]
        at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:371) ~[spring-orm-4.3.14.RELEASE.jar!/:4.3.14.RELEASE]
        at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.afterPropertiesSet(LocalContainerEntityManagerFactoryBean.java:336) ~[spring-orm-4.3.14.RELEASE.jar!/:4.3.14.RELEASE]
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1687) ~[spring-beans-4.3.14.RELEASE.jar!/:4.3.14.RELEASE]
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1624) ~[spring-beans-4.3.14.RELEASE.jar!/:4.3.14.RELEASE]
        ... 24 common frames omitted
Caused by: java.lang.ClassNotFoundException: javax.xml.bind.JAXBException
        at java.base/java.net.URLClassLoader.findClass(URLClassLoader.java:466) ~[na:na]
        at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:563) ~[na:na]
        at org.springframework.boot.loader.LaunchedURLClassLoader.loadClass(LaunchedURLClassLoader.java:94) ~[demo-0.0.1-SNAPSHOT.jar:0.0.1-SNAPSHOT]
        at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:496) ~[na:na]
        ... 35 common frames omitted
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然后我切换到jdk 8,它工作正常.

同样的事情发生与春季启动2.0.0 RC2

当spring doc提到它所需的Java版本为8或9时,为什么会发生这种情况.

dav*_*xxx 50

您需要添加JAXB依赖项(在Java 9中默认不再提供),您必须使用Spring Boot 2:

<dependency>
    <groupId>javax.xml.bind</groupId>
     <artifactId>jaxb-api</artifactId>
    <version>2.3.0</version>
 </dependency>
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请注意,如果使用Java 10,则会出现与仅针对Java 9版本的JAXB依赖项删除完全相同的问题.

关于Java 9及更高版本的Spring Boot wiki列出了在Java 9及更高版本上运行Spring Boot应用程序时需要了解的内容.

Spring Boot版本要求

Spring Boot 1不支持它(并且没有计划).
Spring Boot 2支持它.

Spring Boot 2是第一个支持Java 9的版本(也支持Java 8).如果您使用1.5并希望使用Java 9,则应升级到2.0,因为我们没有计划在Spring Boot 1.5.x上支持Java 9.

Java的10被支持为春季启动的2.0.1.RELEASE而Java的11得到支撑春天启动的2.1.0.M2.

一些已知的解决方法

AspectJ的

使用Java 9,如果需要编写JDK中的类,则需要使用AspectJ 1.9.在大多数情况下,使用AspectJ 1.8(Spring Boot 2.0中的默认设置),Spring AOP应该可以正常工作.

JAXB

升级时,您可能会遇到以下情况:

java.lang.NoClassDefFoundError:javax/xml/bind/JAXBException

Hibernate通常需要默认情况下不再提供的JAXB.您可以添加java.xml.bind模块以使用Java9或Java10恢复此功能(即使该模块已弃用).

<dependency>
    <groupId>javax.xml.bind</groupId>
     <artifactId>jaxb-api</artifactId>
    <version>2.3.0</version>
 </dependency>
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从Java11开始,该模块不可用,因此您唯一的选择是添加JAXB RI(您可以使用Java9代替添加java.xml.bind模块:

<dependency>
    <groupId>org.glassfish.jaxb</groupId>
    <artifactId>jaxb-runtime</artifactId>
</dependency>
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龙目岛

如果您使用的是lombok,则Spring Boot的托管版本可能无法与最新的JDK一起使用.检查Lombok网站并在必要时覆盖其版本.

一些已知的限制

这些库还没有完全支持Java 9:

  • Apache Cassandra,见#10453

如果发生有关Java 9及以上与Spring Boot兼容性的更改,请不要犹豫,编辑这篇文章.

小智 5

添加以下依赖性并解决问题

<dependency>
    <groupId>javax.xml.bind</groupId>
     <artifactId>jaxb-api</artifactId>
    <version>2.3.0</version>
 </dependency>
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