创建名称为'requestMappingHandlerAdapter'的bean时出错-我的代码中没有这样的bean

Question

在我向DispatcherServletConfig添加以下代码安全性之前，我的Web应用程序运行正常，

@Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
    registry.addResourceHandler("/resources/**").addResourceLocations("/resources/");
}

添加此代码后，我遇到了一些例外（不知道这是否重要，如果是，请让我知道，以便我可以编辑我的帖子），然后我决定删除这段代码。 删除此代码后，由于上述错误，我无法再运行我的应用程序。

以下是一段堆栈跟踪（还有更多，但由于SO 30k字符限制，我不能放它）：

23-Jul-2018 14:04:30.665 INFO [http-nio-8090-exec-7] org.apache.catalina.core.ApplicationContext.log 2 Spring WebApplicationInitializers detected on classpath
23-Jul-2018 14:04:30.829 INFO [http-nio-8090-exec-7] org.apache.catalina.core.ApplicationContext.log Initializing Spring FrameworkServlet 'dispatcher'
23-Jul-2018 14:04:33.402 SEVERE [http-nio-8090-exec-7] org.apache.catalina.core.ApplicationContext.log 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.NoSuchMethodError: org.springframework.core.ReactiveAdapterRegistry.getSharedInstance()Lorg/springframework/core/ReactiveAdapterRegistry;
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:583)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1249)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1098)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:545)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:502)
    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:312)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:310)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:756)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:868)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549)
    at org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:676)
    at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:545)
    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:1183)
    at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:992)
    at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4931)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5241)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:752)
    at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:728)
    at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:734)
    at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:630)
    at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:501)
    at org.apache.catalina.startup.HostConfig.check(HostConfig.java:1654)
    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:497)
    at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:300)
    at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819)
    at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801)
    at org.apache.catalina.manager.ManagerServlet.check(ManagerServlet.java:1483)
    at org.apache.catalina.manager.ManagerServlet.deploy(ManagerServlet.java:904)
    at org.apache.catalina.manager.ManagerServlet.doGet(ManagerServlet.java:336)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:635)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at org.apache.catalina.filters.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:108)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:595)
    at org.apache.catalina.valves.RequestFilterValve.process(RequestFilterValve.java:348)
    at org.apache.catalina.valves.RemoteAddrValve.invoke(RemoteAddrValve.java:52)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:80)
    at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:650)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)
    at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:799)
    at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
    at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1457)
    at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:745)

这是我的DispatcherServletConfig.java：

package rs.codecraft.myapp.config;

import org.apache.commons.dbcp2.BasicDataSource;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;
import org.springframework.context.support.PropertySourcesPlaceholderConfigurer;
import org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.web.servlet.ViewResolver;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
import org.springframework.web.servlet.view.InternalResourceViewResolver;
import rs.codecraft.myapp.mail.MailHandler;
import rs.codecraft.myapp.model.AppModel;

@Configuration
@ComponentScan(basePackages = "rs.codecraft.myapp")
@EnableWebMvc
@PropertySource("classpath:rs/codecraft/myapp/properties/application.properties")
public class DispatcherServletConfig implements WebMvcConfigurer {

    @Value("${database.driverClassName}")
    private String databaseDriverClassName;

    @Value("${database.URL}")
    private String databaseURL;

    @Value("${database.username}")
    private String databaseUsername;

    @Value("${database.password}")
    private String databasePassword;

    @Bean
    public ViewResolver viewResolver() {
        return new InternalResourceViewResolver("/WEB-INF/view/", ".jsp");
    }

    @Bean
    public static PropertySourcesPlaceholderConfigurer placeholderConfigurer() {
        return new PropertySourcesPlaceholderConfigurer();
    }

    @Bean
    public NamedParameterJdbcTemplate jdbcTemplate() {
        BasicDataSource l_DataSource = new BasicDataSource();
        l_DataSource.setDriverClassName(databaseDriverClassName);
        l_DataSource.setUrl(databaseURL);
        l_DataSource.setUsername(databaseUsername);
        l_DataSource.setPassword(databasePassword);
        return new NamedParameterJdbcTemplate(l_DataSource);
    }

    @Bean
    public PasswordEncoder passwordEncoder() {
        return new BCryptPasswordEncoder();
    }

    @Bean
    public AppModel model() {
        return new AppModel();
    }

    @Bean
    public MailHandler mailHandler() {
        return new MailHandler();
    }

}

非常感谢您的帮助！ 预先感谢！