Java org.springframework.beans.factory.BeanCreationException&；org.springframework.beans.beans实例异常，未找到默认构造函数

如果我试图将facebook参数注入构造函数，我将尝试使用FacebookAPI创建一个使用spring+thymeleaf+hibernate的facebook应用程序

它显示了以下错误

Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'facebookController' defined in file [D:\ff-sdefault constructor found; nested exception is java.lang.NoSuchMethodException: com.ff.FacebookController$$EnhancerByCGLIB$$80bb261.<init>()
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1030)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:975)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:504)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:299)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:295)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:195)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:665)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:760)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:482)
    at org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext.refresh(AnnotationConfigEmbeddedWebApplicationContext.java:193)
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:514)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:281)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:697)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:686)
    at com.fff.Application.main(Application.java:192)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)
Caused by: org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [com.ff.FacebookController$$EnhancerByCGLIB$$80bb261]: No default constructor found; nested exception is java.lang.NoSuchMethodException: com.fff.FacebookController$$EnhancerByCGLIB$$80bb261.<init>()
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:85)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1023)
    ... 21 more
Caused by: java.lang.NoSuchMethodException: com.fff.FacebookController$$EnhancerByCGLIB$$80bb261.<init>()
    at java.lang.Class.getConstructor0(Class.java:2800)
    at java.lang.Class.getDeclaredConstructor(Class.java:2043)
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:80)
    ... 22 more
2013-11-04 16:30:27.157  INFO 5132 --- [           main] j.LocalContainerEntityManagerFactoryBean : Closing JPA EntityManagerFactory for persistence unit 'default'

您的“FacebookController”没有默认构造函数

publicFaceBookController（）

，Spring需要它来创建一个新bean。当您声明构造函数

publicfacebookcontroller（Facebook）

时，您告诉Spring只有现有的构造函数接收一个参数

您可以使用默认构造函数，如

@Autowire
private Facebook facebook;

public FacebookController() { }

---

请检查您的启动日志，并确保正在创建

facebook

bean。让我们看看您的上下文。你犯了严重的错误。你在使用Spring 3.2吗？

@Autowire
private Facebook facebook;

public FacebookController() { }