java.lang.NoClassDefFoundError: org/springframework/web/context/request/async/CallableProcessingInte

本文介绍了解决SSM框架下Tomcat启动时报java.lang.NoClassDefFoundError的具体步骤。通过清理Tomcat的工作目录,成功解决了该问题。
使用SSM框架做项目时,当启动tomcat后报java.lang.NoClassDefFoundError: org/springframework/web/context/request/async/CallableProcessingInte这个错误,因为之前项目没出现这个错误,我就在网上找解决方案一直没有成功,后来我清理了tomcat的工作目录就没报错了。
java.lang.IllegalStateException: Failed to load ApplicationContext for [WebMergedContextConfiguration@7180e701 testClass = com.example.mybatisplus.Chapter05ApplicationMPTests, locations = [], classes = [com.example.mybatisplus.MybatisPlusApplication], contextInitializerClasses = [], activeProfiles = [], propertySourceDescriptors = [], propertySourceProperties = ["org.springframework.boot.test.context.SpringBootTestContextBootstrapper=true"], contextCustomizers = [org.springframework.boot.test.context.filter.ExcludeFilterContextCustomizer@593aaf41, org.springframework.boot.test.json.DuplicateJsonObjectContextCustomizerFactory$DuplicateJsonObjectContextCustomizer@37d4349f, org.springframework.boot.test.mock.mockito.MockitoContextCustomizer@0, org.springframework.boot.test.web.client.TestRestTemplateContextCustomizer@437da279, org.springframework.boot.test.web.reactor.netty.DisableReactorResourceFactoryGlobalResourcesContextCustomizerFactory$DisableReactorResourceFactoryGlobalResourcesContextCustomizerCustomizer@1151e434, org.springframework.boot.test.autoconfigure.OnFailureConditionReportContextCustomizerFactory$OnFailureConditionReportContextCustomizer@55634720, org.springframework.boot.test.autoconfigure.actuate.observability.ObservabilityContextCustomizerFactory$DisableObservabilityContextCustomizer@1f, org.springframework.boot.test.autoconfigure.properties.PropertyMappingContextCustomizer@0, org.springframework.boot.test.autoconfigure.web.servlet.WebDriverContextCustomizer@4a883b15, org.springframework.test.context.support.DynamicPropertiesContextCustomizer@0, org.springframework.boot.test.context.SpringBootTestAnnotation@33298d10], resourceBasePath = "src/main/webapp", contextLoader = org.springframework.boot.test.context.SpringBootContextLoader, parent = null] at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:180) at org.springframework.test.context.support.DefaultTestContext.getApplicationContext(DefaultTestContext.java:130) at org.springframework.test.context.web.ServletTestExecutionListener.setUpRequestContextIfNecessary(ServletTestExecutionListener.java:200) at org.springframework.test.context.web.ServletTestExecutionListener.prepareTestInstance(ServletTestExecutionListener.java:139) at org.springframework.test.context.TestContextManager.prepareTestInstance(TestContextManager.java:260) at org.springframework.test.context.junit.jupiter.SpringExtension.postProcessTestInstance(SpringExtension.java:159) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:179) at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197) at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1625) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596) at java.base/java.util.Optional.orElseGet(Optional.java:364) at java.base/java.util.ArrayList.forEach(ArrayList.java:1511) at java.base/java.util.ArrayList.forEach(ArrayList.java:1511) Caused by: java.lang.TypeNotPresentException: Type [unknown] not present at java.base/java.lang.reflect.Method.getDefaultValue(Method.java:724) at java.base/java.lang.Class.createAnnotationData(Class.java:4068) at java.base/java.lang.Class.annotationData(Class.java:4057) at java.base/java.lang.Class.getDeclaredAnnotations(Class.java:4024) at org.springframework.core.annotation.AnnotationsScanner.getDeclaredAnnotations(AnnotationsScanner.java:446) at org.springframework.core.annotation.AnnotationsScanner.isKnownEmpty(AnnotationsScanner.java:486) at org.springframework.core.annotation.TypeMappedAnnotations.from(TypeMappedAnnotations.java:259) at org.springframework.core.annotation.MergedAnnotations.from(MergedAnnotations.java:374) at org.springframework.core.annotation.MergedAnnotations.from(MergedAnnotations.java:362) at org.springframework.core.annotation.MergedAnnotations.from(MergedAnnotations.java:342) at org.springframework.core.type.StandardAnnotationMetadata.<init>(StandardAnnotationMetadata.java:86) at org.springframework.core.type.StandardAnnotationMetadata.from(StandardAnnotationMetadata.java:173) at org.springframework.core.type.AnnotationMetadata.introspect(AnnotationMetadata.java:134) at org.springframework.beans.factory.annotation.AnnotatedGenericBeanDefinition.<init>(AnnotatedGenericBeanDefinition.java:58) at org.springframework.context.annotation.AnnotatedBeanDefinitionReader.doRegisterBean(AnnotatedBeanDefinitionReader.java:253) at org.springframework.context.annotation.AnnotatedBeanDefinitionReader.registerBean(AnnotatedBeanDefinitionReader.java:147) at org.springframework.context.annotation.AnnotatedBeanDefinitionReader.register(AnnotatedBeanDefinitionReader.java:137) at org.springframework.boot.BeanDefinitionLoader.load(BeanDefinitionLoader.java:161) at org.springframework.boot.BeanDefinitionLoader.load(BeanDefinitionLoader.java:136) at org.springframework.boot.BeanDefinitionLoader.load(BeanDefinitionLoader.java:129) at org.springframework.boot.SpringApplication.load(SpringApplication.java:697) at org.springframework.boot.SpringApplication.prepareContext(SpringApplication.java:414) at org.springframework.boot.SpringApplication.run(SpringApplication.java:317) at org.springframework.boot.test.context.SpringBootContextLoader.lambda$loadContext$3(SpringBootContextLoader.java:144) at org.springframework.util.function.ThrowingSupplier.get(ThrowingSupplier.java:58) at org.springframework.util.function.ThrowingSupplier.get(ThrowingSupplier.java:46) at org.springframework.boot.SpringApplication.withHook(SpringApplication.java:1461) at org.springframework.boot.test.context.SpringBootContextLoader$ContextLoaderHook.run(SpringBootContextLoader.java:563) at org.springframework.boot.test.context.SpringBootContextLoader.loadContext(SpringBootContextLoader.java:144) at org.springframework.boot.test.context.SpringBootContextLoader.loadContext(SpringBootContextLoader.java:110) at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContextInternal(DefaultCacheAwareContextLoaderDelegate.java:225) at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:152) ... 19 more Caused by: java.lang.NoClassDefFoundError: org/springframework/dao/support/DaoSupport at java.base/java.lang.ClassLoader.defineClass1(Native Method) at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1012) at java.base/java.security.SecureClassLoader.defineClass(SecureClassLoader.java:150) at java.base/jdk.internal.loader.BuiltinClassLoader.defineClass(BuiltinClassLoader.java:862) at java.base/jdk.internal.loader.BuiltinClassLoader.findClassOnClassPathOrNull(BuiltinClassLoader.java:760) at java.base/jdk.internal.loader.BuiltinClassLoader.loadClassOrNull(BuiltinClassLoader.java:681) at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:639) at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188) at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:520) at java.base/java.lang.ClassLoader.defineClass1(Native Method) at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1012) at java.base/java.security.SecureClassLoader.defineClass(SecureClassLoader.java:150) at java.base/jdk.internal.loader.BuiltinClassLoader.defineClass(BuiltinClassLoader.java:862) at java.base/jdk.internal.loader.BuiltinClassLoader.findClassOnClassPathOrNull(BuiltinClassLoader.java:760) at java.base/jdk.internal.loader.BuiltinClassLoader.loadClassOrNull(BuiltinClassLoader.java:681) at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:639) at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188) at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:520) at java.base/java.lang.Class.forName0(Native Method) at java.base/java.lang.Class.forName(Class.java:467) at java.base/java.lang.reflect.Method.getDefaultValue(Method.java:717) ... 50 more Caused by: java.lang.ClassNotFoundException: org.springframework.dao.support.DaoSupport at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:641) at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188) at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:520) ... 71 more
最新发布
10-25
### 关于 `java.lang.NoClassDefFoundError: org/springframework/web/client/RestTemplate` 的解决方案 在 Java 中,当出现 `NoClassDefFoundError` 错误时,通常是因为运行时环境中缺少某个类的定义。对于 `org.springframework.web.client.RestTemplate` 类引发的 `NoClassDefFoundError`,其原因可能是 Spring 相关依赖未正确引入或版本不匹配。 以下是解决此问题的详细方法: #### 1. 检查 Maven 或 Gradle 配置 确保项目中正确引入了 `spring-web` 模块。以下是 Maven 和 Gradle 的依赖配置示例: **Maven 配置:** ```xml <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>5.3.22</version> <!-- 根据实际需求选择合适的版本 --> </dependency> ``` **Gradle 配置:** ```gradle implementation 'org.springframework:spring-web:5.3.22' // 根据实际需求选择合适的版本 ``` 如果使用的是 Spring Boot,则可以通过引入 Spring Boot Starter Web 来自动包含 `RestTemplate` 所需的依赖: ```xml <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> <version>2.7.0</version> <!-- 根据实际需求选择合适的版本 --> </dependency> ``` #### 2. 确保依赖冲突已解决 在某些情况下,项目中可能存在多个版本的 Spring 框架依赖,导致类加载失败。可以使用以下命令检查依赖树并解决冲突: **Maven:** ```bash mvn dependency:tree ``` **Gradle:** ```bash gradle dependencies ``` 通过上述命令找到可能的冲突,并调整依赖版本以确保一致性。 #### 3. 验证类路径是否正确 如果手动将 JAR 文件添加到项目的 `lib` 目录中,请确保以下几点: - `spring-web` JAR 文件已正确添加。 - 其他依赖(如 `spring-core`、`spring-context`)也已正确添加[^3]。 - 如果使用的是 Tomcat 容器,请确保这些 JAR 文件已复制到 `WEB-INF/lib` 目录下。 #### 4. 检查 Spring Boot 版本与依赖兼容性 如果项目是基于 Spring Boot 的,请确保 Spring Boot 的版本与 Spring Cloud Alibaba 或其他扩展框架的版本兼容。例如,Spring Boot 2.3.x 应与 Spring Cloud Hoxton.SR9 兼容[^5]。 #### 示例代码 以下是一个简单的 `RestTemplate` 使用示例: ```java import org.springframework.web.client.RestTemplate; public class RestTemplateExample { public static void main(String[] args) { RestTemplate restTemplate = new RestTemplate(); String response = restTemplate.getForObject("https://jsonplaceholder.typicode.com/todos/1", String.class); System.out.println(response); } } ``` ### 注意事项 - 确保项目的构建工具(如 Maven 或 Gradle)已正确配置。 - 如果使用的是 IDE(如 IntelliJ IDEA 或 Eclipse),请清理并重新构建项目以应用最新的依赖配置。 - 在 Spring Boot 项目中,建议优先使用 `spring-boot-starter-web` 而非单独引入 `spring-web`。 ---
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