java.lang.NoClassDefFoundError: com/sun/istack/FinalArrayList org.springframework.context.Applicatio

java.lang.NoClassDefFoundError: com/sun/istack/FinalArrayList org.springframework.context.ApplicationContextException: Unable to start web server; nested exception is org.springframework.boot.web.server.WebServerException: Unable to start embedded Tomcat Caused by: java.lang.IllegalStateException: StandardEngine[Tomcat].StandardHost[localhost].TomcatEmbeddedContext[] failed to start

这又是springcloud与springboot的版本问题,
修改一下父工程里的pom文件,修改如下:

<parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.2.5.RELEASE</version>
</parent>

即,将spring-boot-starter-parent的版本修改为 2.2.5.RELEASE

原bug如下:

java.lang.NoClassDefFoundError: com/sun/istack/FinalArrayList
	at com.sun.xml.bind.v2.ContextFactory.createContext(ContextFactory.java:228) ~[jaxb-runtime-2.3.4.jar:2.3.4]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_291]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_291]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_291]
	at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_291]
	at javax.xml.bind.ContextFinder.newInstance(ContextFinder.java:171) ~[na:1.8.0_291]
	at javax.xml.bind.ContextFinder.newInstance(ContextFinder.java:131) ~[na:1.8.0_291]
	at javax.xml.bind.ContextFinder.find(ContextFinder.java:335) ~[na:1.8.0_291]
	at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:431) ~[na:1.8.0_291]
	at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:394) ~[na:1.8.0_291]
	at com.sun.jersey.server.impl.wadl.WadlApplicationContextImpl.<init>(WadlApplicationContextImpl.java:103) ~[jersey-server-1.19.4.jar:1.19.4]
	at com.sun.jersey.server.impl.wadl.WadlFactory.init(WadlFactory.java:100) ~[jersey-server-1.19.4.jar:1.19.4]
	at com.sun.jersey.server.impl.application.RootResourceUriRules.initWadl(RootResourceUriRules.java:169) ~[jersey-server-1.19.4.jar:1.19.4]
	at com.sun.jersey.server.impl.application.RootResourceUriRules.<init>(RootResourceUriRules.java:106) ~[jersey-server-1.19.4.jar:1.19.4]
	at com.sun.jersey.server.impl.application.WebApplicationImpl._initiate(WebApplicationImpl.java:1359) ~[jersey-server-1.19.4.jar:1.19.4]
	at com.sun.jersey.server.impl.application.WebApplicationImpl.access$700(WebApplicationImpl.java:180) ~[jersey-server-1.19.4.jar:1.19.4]
	at com.sun.jersey.server.impl.application.WebApplicationImpl$13.f(WebApplicationImpl.java:799) ~[jersey-server-1.19.4.jar:1.19.4]
	at com.sun.jersey.server.impl.application.WebApplicationImpl$13.f(WebApplicationImpl.java:795) ~[jersey-server-1.19.4.jar:1.19.4]
	at com.sun.jersey.spi.inject.Errors.processWithErrors(Errors.java:193) ~[jersey-core-1.19.1.jar:1.19.1]
	at com.sun.jersey.server.impl.application.WebApplicationImpl.initiate(WebApplicationImpl.java:795) ~[jersey-server-1.19.4.jar:1.19.4]
	at com.sun.jersey.server.impl.application.WebApplicationImpl.initiate(WebApplicationImpl.java:790) ~[jersey-server-1.19.4.jar:1.19.4]
	at com.sun.jersey.spi.container.servlet.ServletContainer.initiate(ServletContainer.java:509) ~[jersey-servlet-1.19.4.jar:1.19.4]
	at com.sun.jersey.spi.container.servlet.ServletContainer$InternalWebComponent.initiate(ServletContainer.java:339) ~[jersey-servlet-1.19.4.jar:1.19.4]
	at com.sun.jersey.spi.container.servlet.WebComponent.load(WebComponent.java:605) ~[jersey-servlet-1.19.4.jar:1.19.4]
	at com.sun.jersey.spi.container.servlet.WebComponent.init(WebComponent.java:207) ~[jersey-servlet-1.19.4.jar:1.19.4]
	at com.sun.jersey.spi.container.servlet.ServletContainer.init(ServletContainer.java:394) ~[jersey-servlet-1.19.4.jar:1.19.4]
	at com.sun.jersey.spi.container.servlet.ServletContainer.init(ServletContainer.java:744) ~[jersey-servlet-1.19.4.jar:1.19.4]
	at org.apache.catalina.core.ApplicationFilterConfig.initFilter(ApplicationFilterConfig.java:270) ~[tomcat-embed-core-9.0.46.jar:9.0.46]
	at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:106) ~[tomcat-embed-core-9.0.46.jar:9.0.46]
	at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4566) [tomcat-embed-core-9.0.46.jar:9.0.46]
	at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5198) [tomcat-embed-core-9.0.46.jar:9.0.46]
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) [tomcat-embed-core-9.0.46.jar:9.0.46]
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1384) [tomcat-embed-core-9.0.46.jar:9.0.46]
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1374) [tomcat-embed-core-9.0.46.jar:9.0.46]
	at java.util.concurrent.FutureTask.run(FutureTask.java:266) [na:1.8.0_291]
	at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75) [tomcat-embed-core-9.0.46.jar:9.0.46]
	at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:134) [na:1.8.0_291]
	at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:909) [tomcat-embed-core-9.0.46.jar:9.0.46]
	at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:829) [tomcat-embed-core-9.0.46.jar:9.0.46]
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) [tomcat-embed-core-9.0.46.jar:9.0.46]
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1384) [tomcat-embed-core-9.0.46.jar:9.0.46]
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1374) [tomcat-embed-core-9.0.46.jar:9.0.46]
	at java.util.concurrent.FutureTask.run(FutureTask.java:266) [na:1.8.0_291]
	at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75) [tomcat-embed-core-9.0.46.jar:9.0.46]
	at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:134) [na:1.8.0_291]
	at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:909) [tomcat-embed-core-9.0.46.jar:9.0.46]
	at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:262) [tomcat-embed-core-9.0.46.jar:9.0.46]
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) [tomcat-embed-core-9.0.46.jar:9.0.46]
	at org.apache.catalina.core.StandardService.startInternal(StandardService.java:433) [tomcat-embed-core-9.0.46.jar:9.0.46]
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) [tomcat-embed-core-9.0.46.jar:9.0.46]
	at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:930) [tomcat-embed-core-9.0.46.jar:9.0.46]
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) [tomcat-embed-core-9.0.46.jar:9.0.46]
	at org.apache.catalina.startup.Tomcat.start(Tomcat.java:486) [tomcat-embed-core-9.0.46.jar:9.0.46]
	at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.initialize(TomcatWebServer.java:123) [spring-boot-2.3.12.RELEASE.jar:2.3.12.RELEASE]
	at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.<init>(TomcatWebServer.java:104) [spring-boot-2.3.12.RELEASE.jar:2.3.12.RELEASE]
	at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory.getTomcatWebServer(TomcatServletWebServerFactory.java:440) [spring-boot-2.3.12.RELEASE.jar:2.3.12.RELEASE]
	at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory.getWebServer(TomcatServletWebServerFactory.java:193) [spring-boot-2.3.12.RELEASE.jar:2.3.12.RELEASE]
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.createWebServer(ServletWebServerApplicationContext.java:178) [spring-boot-2.3.12.RELEASE.jar:2.3.12.RELEASE]
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.onRefresh(ServletWebServerApplicationContext.java:158) [spring-boot-2.3.12.RELEASE.jar:2.3.12.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:545) [spring-context-5.2.15.RELEASE.jar:5.2.15.RELEASE]
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:143) [spring-boot-2.3.12.RELEASE.jar:2.3.12.RELEASE]
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:755) [spring-boot-2.3.12.RELEASE.jar:2.3.12.RELEASE]
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:747) [spring-boot-2.3.12.RELEASE.jar:2.3.12.RELEASE]
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:402) [spring-boot-2.3.12.RELEASE.jar:2.3.12.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:312) [spring-boot-2.3.12.RELEASE.jar:2.3.12.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1247) [spring-boot-2.3.12.RELEASE.jar:2.3.12.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1236) [spring-boot-2.3.12.RELEASE.jar:2.3.12.RELEASE]
	at com.brex.springcloud.EurekaMain7001.main(EurekaMain7001.java:11) [classes/:na]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_291]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_291]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_291]
	at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_291]
	at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) [spring-boot-devtools-2.3.12.RELEASE.jar:2.3.12.RELEASE]
Caused by: java.lang.ClassNotFoundException: com.sun.istack.FinalArrayList
	at java.net.URLClassLoader.findClass(URLClassLoader.java:382) ~[na:1.8.0_291]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:418) ~[na:1.8.0_291]
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:355) ~[na:1.8.0_291]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:351) ~[na:1.8.0_291]
	... 73 common frames omitted

2021-08-07 19:51:06.264 ERROR 6980 --- [  restartedMain] o.apache.catalina.core.StandardContext   : One or more Filters failed to start. Full details will be found in the appropriate container log file
2021-08-07 19:51:06.264 ERROR 6980 --- [  restartedMain] o.apache.catalina.core.StandardContext   : Context [] startup failed due to previous errors
2021-08-07 19:51:06.429  INFO 6980 --- [  restartedMain] o.apache.catalina.core.StandardService   : Stopping service [Tomcat]
2021-08-07 19:51:06.431  WARN 6980 --- [  restartedMain] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.context.ApplicationContextException: Unable to start web server; nested exception is org.springframework.boot.web.server.WebServerException: Unable to start embedded Tomcat
2021-08-07 19:51:06.441  INFO 6980 --- [  restartedMain] ConditionEvaluationReportLoggingListener : 

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2021-08-07 19:51:06.454 ERROR 6980 --- [  restartedMain] o.s.boot.SpringApplication               : Application run failed

org.springframework.context.ApplicationContextException: Unable to start web server; nested exception is org.springframework.boot.web.server.WebServerException: Unable to start embedded Tomcat
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.onRefresh(ServletWebServerApplicationContext.java:161) ~[spring-boot-2.3.12.RELEASE.jar:2.3.12.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:545) ~[spring-context-5.2.15.RELEASE.jar:5.2.15.RELEASE]
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:143) ~[spring-boot-2.3.12.RELEASE.jar:2.3.12.RELEASE]
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:755) [spring-boot-2.3.12.RELEASE.jar:2.3.12.RELEASE]
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:747) [spring-boot-2.3.12.RELEASE.jar:2.3.12.RELEASE]
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:402) [spring-boot-2.3.12.RELEASE.jar:2.3.12.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:312) [spring-boot-2.3.12.RELEASE.jar:2.3.12.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1247) [spring-boot-2.3.12.RELEASE.jar:2.3.12.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1236) [spring-boot-2.3.12.RELEASE.jar:2.3.12.RELEASE]
	at com.brex.springcloud.EurekaMain7001.main(EurekaMain7001.java:11) [classes/:na]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_291]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_291]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_291]
	at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_291]
	at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) [spring-boot-devtools-2.3.12.RELEASE.jar:2.3.12.RELEASE]
Caused by: org.springframework.boot.web.server.WebServerException: Unable to start embedded Tomcat
	at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.initialize(TomcatWebServer.java:142) ~[spring-boot-2.3.12.RELEASE.jar:2.3.12.RELEASE]
	at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.<init>(TomcatWebServer.java:104) ~[spring-boot-2.3.12.RELEASE.jar:2.3.12.RELEASE]
	at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory.getTomcatWebServer(TomcatServletWebServerFactory.java:440) ~[spring-boot-2.3.12.RELEASE.jar:2.3.12.RELEASE]
	at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory.getWebServer(TomcatServletWebServerFactory.java:193) ~[spring-boot-2.3.12.RELEASE.jar:2.3.12.RELEASE]
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.createWebServer(ServletWebServerApplicationContext.java:178) ~[spring-boot-2.3.12.RELEASE.jar:2.3.12.RELEASE]
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.onRefresh(ServletWebServerApplicationContext.java:158) ~[spring-boot-2.3.12.RELEASE.jar:2.3.12.RELEASE]
	... 14 common frames omitted
Caused by: java.lang.IllegalStateException: StandardEngine[Tomcat].StandardHost[localhost].TomcatEmbeddedContext[] failed to start
	at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.rethrowDeferredStartupExceptions(TomcatWebServer.java:187) ~[spring-boot-2.3.12.RELEASE.jar:2.3.12.RELEASE]
	at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.initialize(TomcatWebServer.java:126) ~[spring-boot-2.3.12.RELEASE.jar:2.3.12.RELEASE]
	... 19 common frames omitted

Process finished with exit code 0

### 关于 `java.lang.NoClassDefFoundError: org/springframework/context/ApplicationContext` 的解决方案 #### 问题分析 `java.lang.NoClassDefFoundError` 是一种常见的运行时异常,通常发生在尝试访问某个类时,而该类在编译时存在但在运行时不可用的情况下。对于 `org/springframework/context/ApplicationContext` 类引发的此错误,主要原因是 Spring Framework 的核心依赖项未能正确加载到项目的运行环境中。 以下是可能导致此问题的具体原因及其对应的解决方法: --- #### 可能的原因及解决办法 1. **缺少必要的 Maven 或 Gradle 依赖** 如果项目使用的是基于构建工具(如 Maven 或 Gradle),可能是未正确声明 Spring Context 模块的相关依赖。 解决方案是在项目的 `pom.xml` 文件中添加以下依赖[^1]: ```xml <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>5.3.20</version> <!-- 替换为实际使用的版本 --> </dependency> ``` 对于 Gradle 用户,则应在 `build.gradle` 中加入: ```gradle implementation 'org.springframework:spring-context:5.3.20' // 替换为实际使用的版本 ``` 2. **JAR 文件缺失或损坏** 若手动管理 JAR 文件而非通过构建工具,则可能存在某些必需的 JAR 文件丢失或损坏的情况。Spring 的 `ApplicationContext` 接口位于 `spring-context.jar` 中,因此需确认该项目文件已被正确引入并存在于最终打包的应用程序中[^4]。 验证方式可以是检查 IDE 的库路径或者目标目录下的 `.jar` 文件列表是否存在对应模块。 3. **classpath 路径配置不正确** 当应用程序启动时,如果其 classpath 设置不当,即使所需 JAR 已经下载也可能无法找到所需的类。这常见于 Web 应用部署至 Servlet 容器(如 Tomcat)时发生的问题[^2]。 确认应用服务器的 lib 目录下是否有完整的 Spring Framework 所有组件,并确保它们能够被容器识别和加载。 4. **Bean 定义冲突或其他 XML 错误** 在一些情况下,XML 配置中的 bean 定义可能出现语法错误或者其他逻辑上的缺陷,从而间接影响整个上下文初始化过程失败[^5]。 如下面的例子展示了如何定义一个简单的 DAO Bean: ```xml <bean id="userDao" class="cn.daqiang.Dao.Impl.UserDaoImpl"/> ``` 此处需要注意命名空间、属性拼写以及是否遗漏了其他必要参数。 5. **动态代理引起的反射调用失败** 假设正在利用 AOP 功能实现切面编程等功能,那么还需要额外注意 ProxyFactory 和 CGLIB 支持等相关设置是否齐全[^3]。 --- #### 示例代码调整建议 为了验证上述修改效果,可创建如下测试案例来观察行为变化: ```java import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; public class MainApp { public static void main(String[] args) { try { ApplicationContext context = new ClassPathXmlApplicationContext("Beans.xml"); System.out.println(context.getBean("userDao")); } catch (Exception e) { e.printStackTrace(); } } } ``` 其中 `"Beans.xml"` 文件应包含至少一条有效的 `<bean>` 记录用于实例化对象。 --- #### 总结 综上所述,针对 `java.lang.NoClassDefFoundError: org/springframework/context/ApplicationContext` 的处理策略主要包括但不限于重新审视项目结构内的依赖关系、修正潜在的资源配置失误等方面的工作。只有当所有的基础条件都满足之后才能彻底消除此类异常的发生几率。 ---
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