java - 如何修复创建名为 'requestMappingHandlerAdapter' 的 bean 时出错

Question

我正在创建一个简单的 Java Rest API 来从表(MySQL db)中获取所有记录。当我启动应用程序时，Tomcat 7.0 日志显示应用程序抛出了 load() 异常。确切的错误是:

SEVERE: StandardWrapper.Throwable
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'requestMappingHandlerAdapter' defined in org.springframework.web.servlet.config.annotation.DelegatingWebMvcConfiguration: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate `

我尝试更改@Autowire，因为之前的错误是在 Autowire 中找不到所需的 bean。在此之前，由于 SessionFactory 出现了空点异常，因此我重新编写以使用 EntityManager，这两个错误都消失了。无法弄清楚这是如何链接到我的代码的。我是一个新手，试图重用现有代码来获得帮助，所以请原谅任何明显的错误。

Tomcat 跟踪:

SEVERE: StandardWrapper.Throwable
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'requestMappingHandlerAdapter' defined in org.springframework.web.servlet.config.annotation.DelegatingWebMvcConfiguration: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter]: Factory method 'requestMappingHandlerAdapter' threw exception; nested exception is java.lang.NoClassDefFoundError: com/fasterxml/jackson/databind/exc/InvalidDefinitionException
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:587)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1254)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1103)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:541)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:501)
    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:317)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:315)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:760)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:869)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:550)
    at org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:672)
    at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:541)
    at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:499)
    at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:172)
    at javax.servlet.GenericServlet.init(GenericServlet.java:158)
    at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1132)
    at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:976)
    at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4885)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5199)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1412)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1402)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at java.lang.Thread.run(Thread.java:748)
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter]: Factory method 'requestMappingHandlerAdapter' threw exception; nested exception is java.lang.NoClassDefFoundError: com/fasterxml/jackson/databind/exc/InvalidDefinitionException
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185)
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:579)
    ... 27 more
Caused by: java.lang.NoClassDefFoundError: com/fasterxml/jackson/databind/exc/InvalidDefinitionException
    at org.springframework.http.converter.support.AllEncompassingFormHttpMessageConverter.<init>(AllEncompassingFormHttpMessageConverter.java:74)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.<init>(RequestMappingHandlerAdapter.java:188)
    at org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport.createRequestMappingHandlerAdapter(WebMvcConfigurationSupport.java:593)
    at org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport.requestMappingHandlerAdapter(WebMvcConfigurationSupport.java:561)
    at org.springframework.web.servlet.config.annotation.DelegatingWebMvcConfiguration$$EnhancerBySpringCGLIB$$f7fd83d8.CGLIB$requestMappingHandlerAdapter$42(<generated>)
    at org.springframework.web.servlet.config.annotation.DelegatingWebMvcConfiguration$$EnhancerBySpringCGLIB$$f7fd83d8$$FastClassBySpringCGLIB$$1b4477c6.invoke(<generated>)
    at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228)
    at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:361)
    at org.springframework.web.servlet.config.annotation.DelegatingWebMvcConfiguration$$EnhancerBySpringCGLIB$$f7fd83d8.requestMappingHandlerAdapter(<generated>)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154)
    ... 28 more
Caused by: java.lang.ClassNotFoundException: com.fasterxml.jackson.databind.exc.InvalidDefinitionException
    at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1360)
    at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1182)
    ... 42 more

Jul 15, 2019 6:43:51 PM org.apache.catalina.core.StandardContext loadOnStartup
SEVERE: Servlet [dispatcher] in web application [/bookapi] threw load() exception
java.lang.ClassNotFoundException: com.fasterxml.jackson.databind.exc.InvalidDefinitionException
    at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1360)
    at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1182)
    at org.springframework.http.converter.support.AllEncompassingFormHttpMessageConverter.<init>(AllEncompassingFormHttpMessageConverter.java:74)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.<init>(RequestMappingHandlerAdapter.java:188)
    at org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport.createRequestMappingHandlerAdapter(WebMvcConfigurationSupport.java:593)
    at org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport.requestMappingHandlerAdapter(WebMvcConfigurationSupport.java:561)
    at org.springframework.web.servlet.config.annotation.DelegatingWebMvcConfiguration$$EnhancerBySpringCGLIB$$f7fd83d8.CGLIB$requestMappingHandlerAdapter$42(<generated>)
    at org.springframework.web.servlet.config.annotation.DelegatingWebMvcConfiguration$$EnhancerBySpringCGLIB$$f7fd83d8$$FastClassBySpringCGLIB$$1b4477c6.invoke(<generated>)
    at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228)
    at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:361)
    at org.springframework.web.servlet.config.annotation.DelegatingWebMvcConfiguration$$EnhancerBySpringCGLIB$$f7fd83d8.requestMappingHandlerAdapter(<generated>)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154)
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:579)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1254)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1103)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:541)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:501)
    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:317)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:315)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:760)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:869)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:550)
    at org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:672)
    at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:541)
    at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:499)
    at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:172)
    at javax.servlet.GenericServlet.init(GenericServlet.java:158)
    at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1132)
    at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:976)
    at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4885)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5199)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1412)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1402)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at java.lang.Thread.run(Thread.java:748)

Controller :

@CrossOrigin(origins="*")
@RestController
@RequestMapping("/")
public class BookController {
    //@Autowired
    private BookServiceImpl bookServiceImpl = new BookServiceImpl();


     @GetMapping("/api/book")
       public ResponseEntity<List<Book>> ListController() {
          List<Book> bookListController = bookServiceImpl.getAllBookRecordsService();
          return ResponseEntity.ok().body(bookListController);
       }
}

服务

@Service
@PersistenceContext
//@Qualifier("bookService")
public class BookServiceImpl implements BookService{

    @Autowired
    private BookDAO bookDAOImpl;// = new BookDAOImpl();


    @Override
    @Transactional
    public List<Book> getAllBookRecordsService() {
        List<Book> bookListService =  bookDAOImpl.getAllBookRecordsDAO();
        return bookListService;
    }
}

DAO

@Repository
public class BookDAOImpl implements BookDAO{

    @Autowired
    private EntityManagerFactory entityManagerFactory;

    EntityManager em = entityManagerFactory.createEntityManager();

    @Override
    public List<Book> getAllBookRecordsDAO() {
//      List<Book> bookList = new ArrayList<Book>();
//      Book book1 = new Book();
//          book1.setId((long)1);
//          book1.setAuthor("Chetan Bhagat");
//          book1.setTitle("2 States");
//      bookList.add(book1);    
        javax.persistence.Query query = em.createQuery("Select * from Book");
        @SuppressWarnings("unchecked")
        List<Book> bookList = query.getResultList();

//  sessionFactory.getCurrentSession().createQuery("from Book").list();
        return bookList;
    }
}

AppConfig

@Configuration
@EnableTransactionManagement
public class AppConfig2 {

    @Bean
    public LocalContainerEntityManagerFactoryBean entityManagerFactory() {
          LocalContainerEntityManagerFactoryBean factoryBean 
            = new LocalContainerEntityManagerFactoryBean();
          factoryBean.setDataSource(dataSource());
          factoryBean.setPackagesToScan(new String[] { "com.mvctrial,spring.dao", "com.mvctrial,spring.service" });

          JpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
          factoryBean.setJpaVendorAdapter(vendorAdapter);
          factoryBean.setJpaProperties(additionalProperties());

          return factoryBean;
       }

    @Bean
    public DataSource dataSource(){
        DriverManagerDataSource dataSource = new DriverManagerDataSource();
        dataSource.setDriverClassName("com.mysql.cj.jdbc.Driver");
        dataSource.setUrl("jdbc:mysql://localhost:3306/bookapi");
        dataSource.setUsername( "root" );
        dataSource.setPassword( "" );
        return dataSource;
    }

    @Bean
    public PlatformTransactionManager transactionManager(EntityManagerFactory emf) {
        JpaTransactionManager transactionManager = new JpaTransactionManager();
        transactionManager.setEntityManagerFactory(emf);

        return transactionManager;
    }

    @Bean
    public PersistenceExceptionTranslationPostProcessor exceptionTranslation(){
        return new PersistenceExceptionTranslationPostProcessor();
    }

    Properties additionalProperties() {
        Properties properties = new Properties();
        properties.setProperty("hibernate.hbm2ddl.auto", "update");
        properties.setProperty("hibernate.dialect", "org.hibernate.dialect.MySQLDialect");
        properties.setProperty("hibernate.show_sql", "true");    
        properties.setProperty("hibernate.c3p0.min_size", "5");
        properties.setProperty("hibernate.c3p0.min_size", "20");
        properties.setProperty("hibernate.c3p0.acquire_increment","1");
        properties.setProperty("hibernate.c3p0.timeout", "1800");
        properties.setProperty("hibernate.c3p0.max_statments", "150");

        return properties;
    }
}   

Answer 1

所有，我想我在另一个问题的帮助下找到了答案Java.lang.NoClassDefFoundError: com/fasterxml/jackson/databind/exc/InvalidDefinitionException

基本上错误与

有关

java.lang.ClassNotFoundException: com.fasterxml.jackson.databind.exc.InvalidDefinitionException

解决方案是将我的 Jackson-databind 依赖项从 2.8.7 升级到 2.9.4..

现在我有其他异常(exception)，但那是另一个故事了:)