springboot运行结果错误

Question

srpingboot运行结果问题出在哪里了？

2024-01-16 10:12:33.254  INFO 28312 --- [           main] com.example.demo.www.DemoApplication     : Starting DemoApplication using Java 17.0.7 on LAPTOP-1NK9738H with PID 28312 (D:\Users\AppData\IdeaProjects\demo_f2\target\classes started by wang'xiao'fei in D:\Users\AppData\IdeaProjects\demo_f2)
2024-01-16 10:12:33.257  INFO 28312 --- [           main] com.example.demo.www.DemoApplication     : The following 1 profile is active: "dev"
2024-01-16 10:12:33.773 ERROR 28312 --- [           main] o.s.boot.SpringApplication               : Application run failed

java.lang.IllegalStateException: Error processing condition on org.springframework.boot.autoconfigure.context.PropertyPlaceholderAutoConfiguration.propertySourcesPlaceholderConfigurer
    at org.springframework.boot.autoconfigure.condition.SpringBootCondition.matches(SpringBootCondition.java:60) ~[spring-boot-autoconfigure-2.6.13.jar:2.6.13]
    at org.springframework.context.annotation.ConditionEvaluator.shouldSkip(ConditionEvaluator.java:108) ~[spring-context-5.3.23.jar:5.3.23]
    at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitionsForBeanMethod(ConfigurationClassBeanDefinitionReader.java:193) ~[spring-context-5.3.23.jar:5.3.23]
    at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitionsForConfigurationClass(ConfigurationClassBeanDefinitionReader.java:153) ~[spring-context-5.3.23.jar:5.3.23]
    at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitions(ConfigurationClassBeanDefinitionReader.java:129) ~[spring-context-5.3.23.jar:5.3.23]
    at org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:343) ~[spring-context-5.3.23.jar:5.3.23]
    at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:247) ~[spring-context-5.3.23.jar:5.3.23]
    at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanDefinitionRegistryPostProcessors(PostProcessorRegistrationDelegate.java:311) ~[spring-context-5.3.23.jar:5.3.23]
    at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:112) ~[spring-context-5.3.23.jar:5.3.23]
    at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:746) ~[spring-context-5.3.23.jar:5.3.23]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:564) ~[spring-context-5.3.23.jar:5.3.23]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:745) ~[spring-boot-2.6.13.jar:2.6.13]
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:420) ~[spring-boot-2.6.13.jar:2.6.13]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:307) ~[spring-boot-2.6.13.jar:2.6.13]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1317) ~[spring-boot-2.6.13.jar:2.6.13]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1306) ~[spring-boot-2.6.13.jar:2.6.13]
    at com.example.demo.www.DemoApplication.main(DemoApplication.java:10) ~[classes/:na]
Caused by: java.lang.IllegalStateException: Failed to introspect Class [org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport] from ClassLoader [jdk.internal.loader.ClassLoaders$AppClassLoader@63947c6b]
    at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:485) ~[spring-core-5.3.23.jar:5.3.23]
    at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:361) ~[spring-core-5.3.23.jar:5.3.23]
    at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:375) ~[spring-core-5.3.23.jar:5.3.23]
    at org.springframework.util.ReflectionUtils.getUniqueDeclaredMethods(ReflectionUtils.java:418) ~[spring-core-5.3.23.jar:5.3.23]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.lambda$getTypeForFactoryMethod$2(AbstractAutowireCapableBeanFactory.java:765) ~[spring-beans-5.3.23.jar:5.3.23]
    at java.base/java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1708) ~[na:na]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.getTypeForFactoryMethod(AbstractAutowireCapableBeanFactory.java:764) ~[spring-beans-5.3.23.jar:5.3.23]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.determineTargetType(AbstractAutowireCapableBeanFactory.java:703) ~[spring-beans-5.3.23.jar:5.3.23]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.predictBeanType(AbstractAutowireCapableBeanFactory.java:674) ~[spring-beans-5.3.23.jar:5.3.23]
    at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:1670) ~[spring-beans-5.3.23.jar:5.3.23]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doGetBeanNamesForType(DefaultListableBeanFactory.java:570) ~[spring-beans-5.3.23.jar:5.3.23]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanNamesForType(DefaultListableBeanFactory.java:542) ~[spring-beans-5.3.23.jar:5.3.23]
    at org.springframework.boot.autoconfigure.condition.OnBeanCondition.collectBeanNamesForType(OnBeanCondition.java:250) ~[spring-boot-autoconfigure-2.6.13.jar:2.6.13]
    at org.springframework.boot.autoconfigure.condition.OnBeanCondition.getBeanNamesForType(OnBeanCondition.java:243) ~[spring-boot-autoconfigure-2.6.13.jar:2.6.13]
    at org.springframework.boot.autoconfigure.condition.OnBeanCondition.getBeanNamesForType(OnBeanCondition.java:233) ~[spring-boot-autoconfigure-2.6.13.jar:2.6.13]
    at org.springframework.boot.autoconfigure.condition.OnBeanCondition.getMatchingBeans(OnBeanCondition.java:181) ~[spring-boot-autoconfigure-2.6.13.jar:2.6.13]
    at org.springframework.boot.autoconfigure.condition.OnBeanCondition.getMatchOutcome(OnBeanCondition.java:156) ~[spring-boot-autoconfigure-2.6.13.jar:2.6.13]
    at org.springframework.boot.autoconfigure.condition.SpringBootCondition.matches(SpringBootCondition.java:47) ~[spring-boot-autoconfigure-2.6.13.jar:2.6.13]
    ... 16 common frames omitted
Caused by: java.lang.NoClassDefFoundError: javax/servlet/ServletContext
    at java.base/java.lang.Class.getDeclaredMethods0(Native Method) ~[na:na]
    at java.base/java.lang.Class.privateGetDeclaredMethods(Class.java:3402) ~[na:na]
    at java.base/java.lang.Class.getDeclaredMethods(Class.java:2504) ~[na:na]
    at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:467) ~[spring-core-5.3.23.jar:5.3.23]
    ... 33 common frames omitted
Caused by: java.lang.ClassNotFoundException: javax.servlet.ServletContext
    at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:641) ~[na:na]
    at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188) ~[na:na]
    at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:520) ~[na:na]
    ... 37 common frames omitted

2024-01-16 10:12:33.778  WARN 28312 --- [           main] o.s.boot.SpringApplication               : Unable to close ApplicationContext

java.lang.IllegalStateException: Failed to introspect Class [org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport] from ClassLoader [jdk.internal.loader.ClassLoaders$AppClassLoader@63947c6b]
    at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:485) ~[spring-core-5.3.23.jar:5.3.23]
    at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:361) ~[spring-core-5.3.23.jar:5.3.23]
    at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:375) ~[spring-core-5.3.23.jar:5.3.23]
    at org.springframework.util.ReflectionUtils.getUniqueDeclaredMethods(ReflectionUtils.java:418) ~[spring-core-5.3.23.jar:5.3.23]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.lambda$getTypeForFactoryMethod$2(AbstractAutowireCapableBeanFactory.java:765) ~[spring-beans-5.3.23.jar:5.3.23]
    at java.base/java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1708) ~[na:na]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.getTypeForFactoryMethod(AbstractAutowireCapableBeanFactory.java:764) ~[spring-beans-5.3.23.jar:5.3.23]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.determineTargetType(AbstractAutowireCapableBeanFactory.java:703) ~[spring-beans-5.3.23.jar:5.3.23]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.predictBeanType(AbstractAutowireCapableBeanFactory.java:674) ~[spring-beans-5.3.23.jar:5.3.23]
    at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:1670) ~[spring-beans-5.3.23.jar:5.3.23]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doGetBeanNamesForType(DefaultListableBeanFactory.java:570) ~[spring-beans-5.3.23.jar:5.3.23]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanNamesForType(DefaultListableBeanFactory.java:542) ~[spring-beans-5.3.23.jar:5.3.23]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeansOfType(DefaultListableBeanFactory.java:669) ~[spring-beans-5.3.23.jar:5.3.23]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeansOfType(DefaultListableBeanFactory.java:661) ~[spring-beans-5.3.23.jar:5.3.23]
    at org.springframework.context.support.AbstractApplicationContext.getBeansOfType(AbstractApplicationContext.java:1300) ~[spring-context-5.3.23.jar:5.3.23]
    at org.springframework.boot.SpringApplication.getExitCodeFromMappedException(SpringApplication.java:878) ~[spring-boot-2.6.13.jar:2.6.13]
    at org.springframework.boot.SpringApplication.getExitCodeFromException(SpringApplication.java:866) ~[spring-boot-2.6.13.jar:2.6.13]
    at org.springframework.boot.SpringApplication.handleExitCode(SpringApplication.java:853) ~[spring-boot-2.6.13.jar:2.6.13]
    at org.springframework.boot.SpringApplication.handleRunFailure(SpringApplication.java:793) ~[spring-boot-2.6.13.jar:2.6.13]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:317) ~[spring-boot-2.6.13.jar:2.6.13]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1317) ~[spring-boot-2.6.13.jar:2.6.13]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1306) ~[spring-boot-2.6.13.jar:2.6.13]
    at com.example.demo.www.DemoApplication.main(DemoApplication.java:10) ~[classes/:na]
Caused by: java.lang.NoClassDefFoundError: javax/servlet/ServletContext
    at java.base/java.lang.Class.getDeclaredMethods0(Native Method) ~[na:na]
    at java.base/java.lang.Class.privateGetDeclaredMethods(Class.java:3402) ~[na:na]
    at java.base/java.lang.Class.getDeclaredMethods(Class.java:2504) ~[na:na]
    at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:467) ~[spring-core-5.3.23.jar:5.3.23]
    ... 22 common frames omitted
Caused by: java.lang.ClassNotFoundException: javax.servlet.ServletContext
    at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:641) ~[na:na]
    at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188) ~[na:na]
    at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:520) ~[na:na]
    ... 26 common frames omitted

Answer 1

java.lang.NoClassDefFoundError: javax/servlet/ServletContext这个错误表明：Java运行时环境在当前的类路径下找不到javax.servlet.ServletContext类。
这个类是Java Servlet API的一部分，通常会包含在任何实现了Java Servlet规范的容器中，如Tomcat和Jetty。如果你在非Servlet容器中运行你的应用，或者你的项目依赖中没有包含Servlet API，就可能会导致这个错误。
你应该首先确认你的项目中是否包含了Servlet API的依赖。如果你使用的是Maven，你应该在pom.xml文件中添加对应的依赖：

<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>javax.servlet-api</artifactId>
    <version>3.1.0</version>
    <scope>provided</scope>
</dependency>

其中provided表示这个依赖在运行时将由Servlet容器提供。如果你确定你的项目会在一个非Servlet容器中运行，那么你需要去掉这个行。
注意替换为你的Servlet API版本，3.1.0只是一个例子。
如果你的项目已经包含了这个依赖，但你仍然遇到这个问题，那可能是你的IDE或者构建工具（例如，Maven或Gradle）没有正确的配置。你可能需要重新导入你的项目依赖，或者清理并重新构建你的项目。