严重: StandardWrapper.Throwable
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping': Invocation of init method failed; nested exception is org.springframework.beans.factory.CannotLoadBeanClassException: Cannot find class [org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter] for bean with name 'org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter#0' defined in class path resource [springmvc-context.xml]; nested exception is java.lang.ClassNotFoundException: org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter
Related cause: org.springframework.beans.factory.CannotLoadBeanClassException: Cannot find class [org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter] for bean with name 'org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter#0' defined in class path resource [springmvc-context.xml]; nested exception is java.lang.ClassNotFoundException: org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1745)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:576)
原因是Spring 3.x 和4.X处理JSON的一个类不一样，而这个东西又配置在xml文件中，所以编译时又无法发现
spring3.x是org.springframework.http.converter.json.MappingJacksonHttpMessageConverter
spring4.x是org.springframework.http.converter.json.MappingJackson2HttpMessageConverter