我们都知道使用Springmvc的ajax很强大只要三步就可以实现：

1.引入jackson的maven到pom文件：

                 
      
       com.fasterxml.jackson.core
                  
      
       jackson-databind
                  
      
       2.9.5
              
             
             
                 
      
       com.fasterxml.jackson.core
                  
      
       jackson-core
                  
      
       2.9.5
              
             
                 
      
       com.fasterxml.jackson.core
                  
      
       jackson-annotations
                  
      
       2.9.5
      
     

2.配置<mvc:annotation-driven>

3.RequestMapping和ResponseBody的连用

但是项目启动的时候报错：

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 java.lang.NoSuchMethodError: org.springframework.aop.support.AopUtils.selectInvocableMethod(Ljava/lang/reflect/Method;Ljava/lang/Class;)Ljava/lang/reflect/Method;    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1578)    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:545)    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482)    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:305)    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:301)    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:196)    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:772)    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:834)    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:537)    at org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:668)    at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:634)    at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:682)    at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:553)    at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:494)    at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:171)    at javax.servlet.GenericServlet.init(GenericServlet.java:158)

大家不用慌张：

有的时候就是这样，我们就是用不了 <mvc:annotation-driven>

划重点=====================================================================================================================

此时此刻：在SpringMVC的配置中把<mvc:annotation-driven>去掉加上这几行代码

         
             
                  
                       
        
         text/html;charset=UTF-8
                    
               
          
         
         
             
                  
                       
         
                    
               
          
     

这时候再次启动项目就ok娄！！！