我正在尝试在Java 9上运行我的Spring Boot应用程序，我遇到了指南中描述的JAXB问题，但对我不起作用。我添加了对 JAXB API 的依赖，应用程序开始工作。 如果由于缺少 JAXB 缺少使用 Java 版本>=9 的实现而出现以下异常：
javax.xml.bind.JAXBException: Implementation of JAXB-API has not been found on module path or classpath.
at javax.xml.bind.ContextFinder.newInstance(ContextFinder.java:177) ~[jaxb-api-2.3.0.jar:2.3.0]
at javax.xml.bind.ContextFinder.find(ContextFinder.java:364) ~[jaxb-api-2.3.0.jar:2.3.0]
at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:508) ~[jaxb-api-2.3.0.jar:2.3.0]
at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:465) ~[jaxb-api-2.3.0.jar:2.3.0]
at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:366) ~[jaxb-api-2.3.0.jar:2.3.0]
at com.sun.jersey.server.impl.wadl.WadlApplicationContextImpl.<init>(WadlApplicationContextImpl.java:107) ~[jersey-server-1.19.1.jar:1.19.1]
at com.sun.jersey.server.impl.wadl.WadlFactory.init(WadlFactory.java:100) [jersey-server-1.19.1.jar:1.19.1]
at com.sun.jersey.server.impl.application.RootResourceUriRules.initWadl(RootResourceUriRules.java:169) [jersey-server-1.19.1.jar:1.19.1]
at com.sun.jersey.server.impl.application.RootResourceUriRules.<init>(RootResourceUriRules.java:106) [jersey-server-1.19.1.jar:1.19.1]
at com.sun.jersey.server.impl.application.WebApplicationImpl._initiate(WebApplicationImpl.java:1359) [jersey-server-1.19.1.jar:1.19.1]
at com.sun.jersey.server.impl.application.WebApplicationImpl.access$700(WebApplicationImpl.java:180) [jersey-server-1.19.1.jar:1.19.1]
at com.sun.jersey.server.impl.application.WebApplicationImpl$13.f(WebApplicationImpl.java:799) [jersey-server-1.19.1.jar:1.19.1]
at com.sun.jersey.server.impl.application.WebApplicationImpl$13.f(WebApplicationImpl.java:795) [jersey-server-1.19.1.jar:1.19.1]
at com.sun.jersey.spi.inject.Errors.processWithErrors(Errors.java:193) [jersey-core-1.19.1.jar:1.19.1]
at com.sun.jersey.server.impl.application.WebApplicationImpl.initiate(WebApplicationImpl.java:795) [jersey-server-1.19.1.jar:1.19.1]
at com.sun.jersey.server.impl.application.WebApplicationImpl.initiate(WebApplicationImpl.java:790) [jersey-server-1.19.1.jar:1.19.1]
at com.sun.jersey.spi.container.servlet.ServletContainer.initiate(ServletContainer.java:509) [jersey-servlet-1.19.1.jar:1.19.1]
at com.sun.jersey.spi.container.servlet.ServletContainer$InternalWebComponent.initiate(ServletContainer.java:339) [jersey-servlet-1.19.1.jar:1.19.1]
at com.sun.jersey.spi.container.servlet.WebComponent.load(WebComponent.java:605) [jersey-servlet-1.19.1.jar:1.19.1]
at com.sun.jersey.spi.container.servlet.WebComponent.init(WebComponent.java:207) [jersey-servlet-1.19.1.jar:1.19.1]
at com.sun.jersey.spi.container.servlet.ServletContainer.init(ServletContainer.java:394) [jersey-servlet-1.19.1.jar:1.19.1]
at com.sun.jersey.spi.container.servlet.ServletContainer.init(ServletContainer.java:744) [jersey-servlet-1.19.1.jar:1.19.1]
at org.apache.catalina.core.ApplicationFilterConfig.initFilter(ApplicationFilterConfig.java:270) [tomcat-embed-core-9.0.10.jar:9.0.10]
at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:106) [tomcat-embed-core-9.0.10.jar:9.0.10]
at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4491) [tomcat-embed-core-9.0.10.jar:9.0.10]
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5135) [tomcat-embed-core-9.0.10.jar:9.0.10]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) [tomcat-embed-core-9.0.10.jar:9.0.10]
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1427) [tomcat-embed-core-9.0.10.jar:9.0.10]
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1417) [tomcat-embed-core-9.0.10.jar:9.0.10]
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) [na:na]
at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75) [tomcat-embed-core-9.0.10.jar:9.0.10]
at java.base/java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:140) [na:na]
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:943) [tomcat-embed-core-9.0.10.jar:9.0.10]
at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:839) [tomcat-embed-core-9.0.10.jar:9.0.10]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) [tomcat-embed-core-9.0.10.jar:9.0.10]
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1427) [tomcat-embed-core-9.0.10.jar:9.0.10]
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1417) [tomcat-embed-core-9.0.10.jar:9.0.10]
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) [na:na]
at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75) [tomcat-embed-core-9.0.10.jar:9.0.10]
at java.base/java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:140) [na:na]
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:943) [tomcat-embed-core-9.0.10.jar:9.0.10]
at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:258) [tomcat-embed-core-9.0.10.jar:9.0.10]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) [tomcat-embed-core-9.0.10.jar:9.0.10]
at org.apache.catalina.core.StandardService.startInternal(StandardService.java:422) [tomcat-embed-core-9.0.10.jar:9.0.10]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) [tomcat-embed-core-9.0.10.jar:9.0.10]
at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:770) [tomcat-embed-core-9.0.10.jar:9.0.10]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) [tomcat-embed-core-9.0.10.jar:9.0.10]
at org.apache.catalina.startup.Tomcat.start(Tomcat.java:371) [tomcat-embed-core-9.0.10.jar:9.0.10]
at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.initialize(TomcatWebServer.java:107) [spring-boot-2.1.0.M1.jar:2.1.0.M1]
at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.<init>(TomcatWebServer.java:86) [spring-boot-2.1.0.M1.jar:2.1.0.M1]
at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory.getTomcatWebServer(TomcatServletWebServerFactory.java:413) [spring-boot-2.1.0.M1.jar:2.1.0.M1]
at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory.getWebServer(TomcatServletWebServerFactory.java:174) [spring-boot-2.1.0.M1.jar:2.1.0.M1]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.createWebServer(ServletWebServerApplicationContext.java:179) [spring-boot-2.1.0.M1.jar:2.1.0.M1]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.onRefresh(ServletWebServerApplicationContext.java:152) [spring-boot-2.1.0.M1.jar:2.1.0.M1]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:542) [spring-context-5.1.0.RC1.jar:5.1.0.RC1]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:140) [spring-boot-2.1.0.M1.jar:2.1.0.M1]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:769) [spring-boot-2.1.0.M1.jar:2.1.0.M1]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:405) [spring-boot-2.1.0.M1.jar:2.1.0.M1]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:334) [spring-boot-2.1.0.M1.jar:2.1.0.M1]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1252) [spring-boot-2.1.0.M1.jar:2.1.0.M1]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1240) [spring-boot-2.1.0.M1.jar:2.1.0.M1]
at io.eureka.server.EurekaServerApp.main(EurekaServerApp.java:21) [classes/:na]
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.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) [spring-boot-devtools-2.1.0.M1.jar:2.1.0.M1]
Caused by: java.lang.ClassNotFoundException: com.sun.xml.internal.bind.v2.ContextFactory
at org.springframework.boot.web.embedded.tomcat.TomcatEmbeddedWebappClassLoader.loadClass(TomcatEmbeddedWebappClassLoader.java:70) ~[spring-boot-2.1.0.M1.jar:2.1.0.M1]
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1138) ~[tomcat-embed-core-9.0.10.jar:9.0.10]
at javax.xml.bind.ServiceLoaderUtil.nullSafeLoadClass(ServiceLoaderUtil.java:122) ~[jaxb-api-2.3.0.jar:2.3.0]
at javax.xml.bind.ServiceLoaderUtil.safeLoadClass(ServiceLoaderUtil.java:155) ~[jaxb-api-2.3.0.jar:2.3.0]
at javax.xml.bind.ContextFinder.newInstance(ContextFinder.java:174) ~[jaxb-api-2.3.0.jar:2.3.0]
... 66 common frames omitted
将这些依赖项添加到您的 pom/gradle 中：
格拉德尔：
compile('javax.xml.bind:jaxb-api:2.3.0')
compile('javax.activation:activation:1.1')
compile('org.glassfish.jaxb:jaxb-runtime:2.3.0')
绒球：
<!-- https://mvnrepository.com/artifact/javax.xml.bind/jaxb-api -->
<dependency>
<groupId>javax.xml.bind</groupId>
<artifactId>jaxb-api</artifactId>
<version>2.3.0-b170201.1204</version>
</dependency>
<!-- https://mvnrepository.com/artifact/javax.activation/activation -->
<dependency>
<groupId>javax.activation</groupId>
<artifactId>activation</artifactId>
<version>1.1</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.glassfish.jaxb/jaxb-runtime -->
<dependency>
<groupId>org.glassfish.jaxb</groupId>
<artifactId>jaxb-runtime</artifactId>
<version>2.3.0-b170127.1453</version>
</dependency>
添加以下依赖项解决了我的问题：
<!-- JAXB API -->
<dependency>
<groupId>javax.xml.bind</groupId>
<artifactId>jaxb-api</artifactId>
<version>2.3.1</version>
</dependency>
<!-- JAXB RI -->
<dependency>
<groupId>com.sun.xml.bind</groupId>
<artifactId>jaxb-impl</artifactId>
<version>2.3.4</version>
</dependency>
对于那些最近在 IntelliJ 和 Java 17 中看到此问题的人
<dependency>
<groupId>jakarta.xml.bind</groupId>
<artifactId>jakarta.xml.bind-api</artifactId>
<version>4.0.0</version>
</dependency>
<dependency>
<groupId>com.sun.xml.bind</groupId>
<artifactId>jaxb-impl</artifactId>
<version>4.0.0</version>
<scope>runtime</scope>
</dependency>
由于我遇到了这个确切的问题，并且这是Google上弹出的第一个SO问题，因此我将添加我的解决方案，因为我花了8个小时尝试解决问题，但在这里找不到答案。
一些上下文：我们使用的是Java 17，Spring boot 3.0.2。 在我们的诗歌中，我们有
<dependency>
<groupId>jakarta.xml.bind</groupId>
<artifactId>jakarta.xml.bind-api</artifactId>
</dependency>
<dependency>
<groupId>org.glassfish.jaxb</groupId>
<artifactId>jaxb-runtime</artifactId>
</dependency>
由于我们让 Spring 管理我们得到的版本
org.glassfish.jaxb:jaxb-runtime:jar:4.0.1
jakarta.xml.bind:jakarta.xml.bind-api:jar:4.0.0
我们使用玻璃鱼，所以我们的 ClassCastException 略有不同。java.lang.classnotfoundexception: "org.glassfish.jaxb.runtime.v2.contextfactory"
在我们的例子中，问题是我们已经将解封调用包装在CompletableFuture中，这导致了与ForkJoinPool工作方式相关的类加载器问题。 一旦我们理解了这一点，我们就发现了很多相关的问题，比如这个。
我们的解决方案是在创建 JAXBContext 时将类加载器作为第二个参数传递，如下所示：
JAXBContext jaxbContext =
JAXBContext.newInstance(MyClass.class.getPackageName(), MyClass.class.getClassLoader());
这最终解决了问题
我今天遇到这个还有另一个原因.
该应用程序应该在Java8上运行，但我在Java11上运行它，所以是的，请检查您运行的是Java的正确版本。
我遇到了同样的问题，但根本原因却大不相同。在添加所有可能的库组合但没有成功后，我发现，如本问题所述，在自定义 ForkJoinPool 中执行 REST 客户端会影响类加载过程。
其他人似乎也遇到了同样的问题(1,2(
这实际上取决于您使用的库。使用org.glassfish.jaxb时，这对我有用：
compile 'org.glassfish.jaxb:jaxb-xjc:4.0.3'
compile 'org.glassfish.jaxb:jaxb-runtime:4.0.3'
compile 'org.glassfish.jaxb:jaxb-core:4.0.3'
与我一起工作的解决方案是将Java版本更改为Java 8
如果应用程序正在运行，但在调用 Web 服务时收到此错误，则不必在批准的答案中添加所有依赖项。以下依赖项就足够了。
<dependency>
<groupId>org.glassfish.jaxb</groupId>
<artifactId>jaxb-runtime</artifactId>
<version>2.3.1</version>
</dependency>
您可以查看以下链接，了解为 java 9 及更高版本创建 SOAP Web 服务以及使用 java 11 创建工作示例 SOAP 服务的其他问题。
java-11-soap-service-resolveving-issues
这对我有用。
<dependency>
<groupId>com.sun.xml.bind</groupId>
<artifactId>jaxb-impl</artifactId>
<version>2.3.3</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>jakarta.xml.bind</groupId>
<artifactId>jakarta.xml.bind-api</artifactId>
<version>2.3.3</version>
</dependency>