无法找到SpelEvaluationException方法 [英] SpelEvaluationException Method cannot be found
本文介绍了无法找到SpelEvaluationException方法的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我正面临下一个问题，当我尝试使用SpEL将用户传递给服务方法时，
I am facing with the next problem, when I am trying to pass the User to the service method using SpEL,
evaluate expression="commonService.userTest(user)" result="flowScope.user"
spring throwows me以下异常：
spring throws me the following exception:
org.springframework.expression.spel.SpelEvaluationException：EL1004E：（pos 14）：方法调用：方法userTest（com在com.sun.proxy上找不到.x.domain.common.User。$ Proxy114类型
org.springframework.expression.spel.SpelEvaluationException: EL1004E:(pos 14): Method call: Method userTest(com.x.domain.common.User) cannot be found on com.sun.proxy.$Proxy114 type
但是当我路过时纯文本而不是User对象，
But when I am passing a plain text instead of the User object,
evaluate expression="commonService.userTest('Hello')" result="flowScope.user"
没有错误。
@Entity
@Table(name = "users")
@Getter
@Setter
@NoArgsConstructor
@Slf4j
public class User extends BaseEntity implements UserDetails {
@Column(unique = true)
@NotEmpty
private String username;
@Column
@NotEmpty
@Size(min = 5)
private String password;
}
@Service("commonService")
public class CommonServiceImpl implements CommonService {
@Transactional(readOnly = true)
@Override
public User userTest(String name) {
User user = createUser();
user.setUsername(name);
return user;
}
@Transactional(readOnly = true)
@Override
public User userTest(User user) {
return user;
}
}
推荐答案
更新＃2 - 解决方法
删除DevTools依赖项解决了问题，但应用此解决方案 Spring Boot Dev Tools& Web Flow不能很好用，但在 src / main / resources / META-INF / spring-devtools.properties code>使用以下行使其完全没问题
Removing DevTools dependency solved the problem, but applying this solution Spring Boot Dev Tools & Web Flow don't play nice but creating spring-devtools.properties under src/main/resources/META-INF/ with the following line makes it works with no problem at all
restart.include.spring=/.*\.jar
为什么我没有链接中提到的这一行：
Why I didn't this line as mentioned in the link:
restart.include.spring=/spring-.*\.jar
因为我得到了这个例外
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'webFlowConfig': Unsatisfied dependency expressed through field 'webMvcConfig'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'webMvcConfig': Unsatisfied dependency expressed through field 'springTemplateEngine'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'org.springframework.boot.autoconfigure.thymeleaf.ThymeleafAutoConfiguration$ThymeleafDefaultConfiguration': Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'defaultTemplateResolver' defined in class path resource [org/springframework/boot/autoconfigure/thymeleaf/ThymeleafAutoConfiguration$Thymeleaf3Configuration$DefaultTemplateResolverConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.thymeleaf.spring4.templateresolver.SpringResourceTemplateResolver]: Factory method 'defaultTemplateResolver' threw exception; nested exception is java.lang.LinkageError: loader constraint violation: when resolving method "org.thymeleaf.spring4.templateresolver.SpringResourceTemplateResolver.setApplicationContext(Lorg/springframework/context/ApplicationContext;)V" the class loader (instance of org/springframework/boot/devtools/restart/classloader/RestartClassLoader) of the current class, org/springframework/boot/autoconfigure/thymeleaf/AbstractTemplateResolverConfiguration, and the class loader (instance of sun/misc/Launcher$AppClassLoader) for the method's defining class, org/thymeleaf/spring4/templateresolver/SpringResourceTemplateResolver, have different Class objects for the type org/springframework/context/ApplicationContext used in the signature
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:588) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:366) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1264) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:553) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:761) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:867) ~[spring-context-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:543) ~[spring-context-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122) ~[spring-boot-1.5.6.RELEASE.jar:1.5.6.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:693) [spring-boot-1.5.6.RELEASE.jar:1.5.6.RELEASE]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:360) [spring-boot-1.5.6.RELEASE.jar:1.5.6.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:303) [spring-boot-1.5.6.RELEASE.jar:1.5.6.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1118) [spring-boot-1.5.6.RELEASE.jar:1.5.6.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1107) [spring-boot-1.5.6.RELEASE.jar:1.5.6.RELEASE]
at medicallab.MedicallabApplication.main(MedicallabApplication.java:10) [classes/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_121]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_121]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_121]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_121]
at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) [spring-boot-devtools-1.5.6.RELEASE.jar:1.5.6.RELEASE]
Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'webMvcConfig': Unsatisfied dependency expressed through field 'springTemplateEngine'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'org.springframework.boot.autoconfigure.thymeleaf.ThymeleafAutoConfiguration$ThymeleafDefaultConfiguration': Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'defaultTemplateResolver' defined in class path resource [org/springframework/boot/autoconfigure/thymeleaf/ThymeleafAutoConfiguration$Thymeleaf3Configuration$DefaultTemplateResolverConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.thymeleaf.spring4.templateresolver.SpringResourceTemplateResolver]: Factory method 'defaultTemplateResolver' threw exception; nested exception is java.lang.LinkageError: loader constraint violation: when resolving method "org.thymeleaf.spring4.templateresolver.SpringResourceTemplateResolver.setApplicationContext(Lorg/springframework/context/ApplicationContext;)V" the class loader (instance of org/springframework/boot/devtools/restart/classloader/RestartClassLoader) of the current class, org/springframework/boot/autoconfigure/thymeleaf/AbstractTemplateResolverConfiguration, and the class loader (instance of sun/misc/Launcher$AppClassLoader) for the method's defining class, org/thymeleaf/spring4/templateresolver/SpringResourceTemplateResolver, have different Class objects for the type org/springframework/context/ApplicationContext used in the signature
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:588) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:366) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1264) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:553) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:208) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1138) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1066) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:585) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
... 24 common frames omitted
Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'org.springframework.boot.autoconfigure.thymeleaf.ThymeleafAutoConfiguration$ThymeleafDefaultConfiguration': Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'defaultTemplateResolver' defined in class path resource [org/springframework/boot/autoconfigure/thymeleaf/ThymeleafAutoConfiguration$Thymeleaf3Configuration$DefaultTemplateResolverConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.thymeleaf.spring4.templateresolver.SpringResourceTemplateResolver]: Factory method 'defaultTemplateResolver' threw exception; nested exception is java.lang.LinkageError: loader constraint violation: when resolving method "org.thymeleaf.spring4.templateresolver.SpringResourceTemplateResolver.setApplicationContext(Lorg/springframework/context/ApplicationContext;)V" the class loader (instance of org/springframework/boot/devtools/restart/classloader/RestartClassLoader) of the current class, org/springframework/boot/autoconfigure/thymeleaf/AbstractTemplateResolverConfiguration, and the class loader (instance of sun/misc/Launcher$AppClassLoader) for the method's defining class, org/thymeleaf/spring4/templateresolver/SpringResourceTemplateResolver, have different Class objects for the type org/springframework/context/ApplicationContext used in the signature
at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:749) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:189) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1193) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1095) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:513) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:372) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1173) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1067) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:513) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:208) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1138) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1066) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:585) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
... 37 common frames omitted
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'defaultTemplateResolver' defined in class path resource [org/springframework/boot/autoconfigure/thymeleaf/ThymeleafAutoConfiguration$Thymeleaf3Configuration$DefaultTemplateResolverConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.thymeleaf.spring4.templateresolver.SpringResourceTemplateResolver]: Factory method 'defaultTemplateResolver' threw exception; nested exception is java.lang.LinkageError: loader constraint violation: when resolving method "org.thymeleaf.spring4.templateresolver.SpringResourceTemplateResolver.setApplicationContext(Lorg/springframework/context/ApplicationContext;)V" the class loader (instance of org/springframework/boot/devtools/restart/classloader/RestartClassLoader) of the current class, org/springframework/boot/autoconfigure/thymeleaf/AbstractTemplateResolverConfiguration, and the class loader (instance of sun/misc/Launcher$AppClassLoader) for the method's defining class, org/thymeleaf/spring4/templateresolver/SpringResourceTemplateResolver, have different Class objects for the type org/springframework/context/ApplicationContext used in the signature
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:599) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1173) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1067) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:513) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:208) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.addCandidateEntry(DefaultListableBeanFactory.java:1316) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:1282) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveMultipleBeans(DefaultListableBeanFactory.java:1180) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1096) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1066) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:835) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:741) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
... 59 common frames omitted
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.thymeleaf.spring4.templateresolver.SpringResourceTemplateResolver]: Factory method 'defaultTemplateResolver' threw exception; nested exception is java.lang.LinkageError: loader constraint violation: when resolving method "org.thymeleaf.spring4.templateresolver.SpringResourceTemplateResolver.setApplicationContext(Lorg/springframework/context/ApplicationContext;)V" the class loader (instance of org/springframework/boot/devtools/restart/classloader/RestartClassLoader) of the current class, org/springframework/boot/autoconfigure/thymeleaf/AbstractTemplateResolverConfiguration, and the class loader (instance of sun/misc/Launcher$AppClassLoader) for the method's defining class, org/thymeleaf/spring4/templateresolver/SpringResourceTemplateResolver, have different Class objects for the type org/springframework/context/ApplicationContext used in the signature
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:189) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:588) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
... 75 common frames omitted
Caused by: java.lang.LinkageError: loader constraint violation: when resolving method "org.thymeleaf.spring4.templateresolver.SpringResourceTemplateResolver.setApplicationContext(Lorg/springframework/context/ApplicationContext;)V" the class loader (instance of org/springframework/boot/devtools/restart/classloader/RestartClassLoader) of the current class, org/springframework/boot/autoconfigure/thymeleaf/AbstractTemplateResolverConfiguration, and the class loader (instance of sun/misc/Launcher$AppClassLoader) for the method's defining class, org/thymeleaf/spring4/templateresolver/SpringResourceTemplateResolver, have different Class objects for the type org/springframework/context/ApplicationContext used in the signature
at org.springframework.boot.autoconfigure.thymeleaf.AbstractTemplateResolverConfiguration.defaultTemplateResolver(AbstractTemplateResolverConfiguration.java:70) ~[spring-boot-autoconfigure-1.5.6.RELEASE.jar:1.5.6.RELEASE]
at org.springframework.boot.autoconfigure.thymeleaf.ThymeleafAutoConfiguration$Thymeleaf3Configuration$DefaultTemplateResolverConfiguration.defaultTemplateResolver(ThymeleafAutoConfiguration.java:140) ~[spring-boot-autoconfigure-1.5.6.RELEASE.jar:1.5.6.RELEASE]
at org.springframework.boot.autoconfigure.thymeleaf.ThymeleafAutoConfiguration$Thymeleaf3Configuration$DefaultTemplateResolverConfiguration$$EnhancerBySpringCGLIB$$f2a7a126.CGLIB$defaultTemplateResolver$0(<generated>) ~[spring-boot-autoconfigure-1.5.6.RELEASE.jar:1.5.6.RELEASE]
at org.springframework.boot.autoconfigure.thymeleaf.ThymeleafAutoConfiguration$Thymeleaf3Configuration$DefaultTemplateResolverConfiguration$$EnhancerBySpringCGLIB$$f2a7a126$$FastClassBySpringCGLIB$$7a53489b.invoke(<generated>) ~[spring-boot-autoconfigure-1.5.6.RELEASE.jar:1.5.6.RELEASE]
at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228) ~[spring-core-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:358) ~[spring-context-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at org.springframework.boot.autoconfigure.thymeleaf.ThymeleafAutoConfiguration$Thymeleaf3Configuration$DefaultTemplateResolverConfiguration$$EnhancerBySpringCGLIB$$f2a7a126.defaultTemplateResolver(<generated>) ~[spring-boot-autoconfigure-1.5.6.RELEASE.jar:1.5.6.RELEASE]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_121]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_121]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_121]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_121]
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:162) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEA
SE]
... 76 common frames omitted
所以我现在必须包括所有的罐子。
希望这可能在将来帮助某人，但请参阅更新＃1 ，因为这可能会在将来解决 Spring DevTools类加载器限制，但导致LiveReload服务器无法运行。
So I have to include all jars for now. Hope this might help someone in the future, but please refer to Update #1 because this might going to be solved in the future Spring DevTools classloader limitations, but that lead to LiveReload server doesn't run.
更新＃1
这似乎是一个DevTools问题（ 自定义重启类加载器）可能会很快修复 Spring DevTools类加载器限制。它是在本期 Spring Boot Dev Tools&网络流量不好玩
It seems this a DevTools issue (Customizing the restart classloader) which might be fixed soon Spring DevTools classloader limitations. It is started in this issue Spring Boot Dev Tools & Web Flow don't play nice
原始答案
我有几次同样的问题，我做了一个测试，我发现了一个奇怪的行为。
I had the same issue several times, I have done a test and I found that a weird behavior.
public class SomeModel implements Serializable {
private static final long serialVersionUID = -7967970066125990593L;
...
}
CustomFlowAction.java
CustomFlowAction.java
package app.flow;
public class CustomFlowAction {
// Note here the paramter is of type Object, just to use casting instead of using the object directly to test if I have the correct one
public boolean someAction(Object obj, RequestContext context) {
SomeModel someModel = (SomeModel) obj;
return true
}
public SomeModel prepareSomeModel() {
return new SomeModel();
}
}
（流程示例1）some-flow.xml
(Flow Example 1) some-flow.xml
这个例子是使用一个spring bean，它工作正常，someAction方法返回true。
This example is using a spring bean, it works fine and someAction method returns true.
<flow ...>
<view-state id="StateOne" model="someModel">
<transition on="next" to="StateTwo">
<evaluate expression="customFlowAction.someAction(someModel, flowRequestContext)"></evaluate>
</transition>
</view-state>
</flow>
（流程示例2）some-flow.xml
(Flow Example 2) some-flow.xml
这个例子是从SomeModel创建一个新对象并将其存储在flowScope中，然后在模板中使用它。
This example is creating a new object from SomeModel and stores it flowScope, then uses it inside the template.
<flow ...>
<on-start>
<evaluate expression="submitRequestFlowAction.prepareSomeModel()" result="flowScope.someModel"></evaluate>
</on-start>
<view-state id="StateOne" model="someModel">
<transition on="next" to="StateTwo">
<evaluate expression="customFlowAction.someAction(someModel, flowRequestContext)"></evaluate>
</transition>
</view-state>
</flow>
The output is:
The output is:
java.lang.ClassCastException: app.flow.SomeModel cannot be cast to app.flow.SomeModel
Some guys guided me to there might be another classloader involved in the issue, and one told me this:
Some guys guided me to there might be another classloader involved in the issue, and one told me this:
Note that classloader is part of class types: class A, loaded by
classloader CL1, is not the same as class A loaded by classloader CL2,
even though the actual A.class might be the same file
Note that classloader is part of class types: class A, loaded by classloader CL1, is not the same as class A loaded by classloader CL2, even though the actual A.class might be the same file
Hope this would be helpful for you and anyone else in trouble like me :)
Hope this would be helpful for you and anyone else in trouble like me :)
这篇关于无法找到SpelEvaluationException方法的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
查看全文
