I don't know what went wrong.
I'll attach the sources and advice to me why the error is happening..
pom.xml
<!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>4.3.8.RELEASE</version>
</dependency>
that is error code
org.springframework.beans.factory.BeanInitializationException: Error loading DispatcherServlet's default strategy class [org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerExceptionResolver] for interface [org.springframework.web.servlet.HandlerExceptionResolver]: problem with class file or dependent class; nested exception is java.lang.NoClassDefFoundError: org/springframework/core/annotation/SynthesizingMethodParameter
at org.springframework.web.servlet.DispatcherServlet.getDefaultStrategies(DispatcherServlet.java:830)
at org.springframework.web.servlet.DispatcherServlet.initHandlerExceptionResolvers(DispatcherServlet.java:669)
at org.springframework.web.servlet.DispatcherServlet.initStrategies(DispatcherServlet.java:489)
at org.springframework.web.servlet.DispatcherServlet.onRefresh(DispatcherServlet.java:476)
at org.springframework.web.servlet.FrameworkServlet.onApplicationEvent(FrameworkServlet.java:806)
at org.springframework.web.servlet.FrameworkServlet$ContextRefreshListener.onApplicationEvent(FrameworkServlet.java:1121)
at
I don't know why I get an error.
please let me know how to fix the problem.