我怎样才能解决500错误？

Question

我正在Spring MVC中创建基本的HelloWorld应用程序。

但是它让我错误。 的错误

SEVERE: StandardWrapper.Throwable
java.lang.IllegalAccessError: tried to access class org.springframework.core.convert.support.NumberToNumberConverterFactory from class org.springframework.core.convert.support.DefaultConversionService
    at org.springframework.core.convert.support.DefaultConversionService.addScalarConverters(DefaultConversionService.java:129)
    at org.springframework.core.convert.support.DefaultConversionService.addDefaultConverters(DefaultConversionService.java:75)
    at org.springframework.core.convert.support.DefaultConversionService.<init>(DefaultConversionService.java:62)
    at org.springframework.core.env.AbstractPropertyResolver.<init>(AbstractPropertyResolver.java:41)
    at org.springframework.core.env.PropertySourcesPropertyResolver.<init>(PropertySourcesPropertyResolver.java:41)
    at org.springframework.core.env.AbstractEnvironment.<init>(AbstractEnvironment.java:113)
    at org.springframework.core.env.StandardEnvironment.<init>(StandardEnvironment.java:54)
    at org.springframework.web.context.support.StandardServletEnvironment.<init>(StandardServletEnvironment.java:44)
    at org.springframework.web.servlet.HttpServletBean.createEnvironment(HttpServletBean.java:215)
    at org.springframework.web.servlet.HttpServletBean.getEnvironment(HttpServletBean.java:205)
    at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:126)
    at javax.servlet.GenericServlet.init(GenericServlet.java:158)
    at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1241)
    at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1154)
    at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:827)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:135)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:503)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:136)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
    at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:610)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:526)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1078)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:655)
    at org.apache.coyote.http11.Http11NioProtocol$Http11ConnectionHandler.process(Http11NioProtocol.java:222)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1566)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1523)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Unknown Source)

Feb 16, 2016 4:06:21 PM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Allocate exception for servlet dispatcher
java.lang.IllegalAccessError: tried to access class org.springframework.core.convert.support.NumberToNumberConverterFactory from class org.springframework.core.convert.support.DefaultConversionService
    at org.springframework.core.convert.support.DefaultConversionService.addScalarConverters(DefaultConversionService.java:129)
    at org.springframework.core.convert.support.DefaultConversionService.addDefaultConverters(DefaultConversionService.java:75)
    at org.springframework.core.convert.support.DefaultConversionService.<init>(DefaultConversionService.java:62)
    at org.springframework.core.env.AbstractPropertyResolver.<init>(AbstractPropertyResolver.java:41)
    at org.springframework.core.env.PropertySourcesPropertyResolver.<init>(PropertySourcesPropertyResolver.java:41)
    at org.springframework.core.env.AbstractEnvironment.<init>(AbstractEnvironment.java:113)
    at org.springframework.core.env.StandardEnvironment.<init>(StandardEnvironment.java:54)
    at org.springframework.web.context.support.StandardServletEnvironment.<init>(StandardServletEnvironment.java:44)
    at org.springframework.web.servlet.HttpServletBean.createEnvironment(HttpServletBean.java:215)
    at org.springframework.web.servlet.HttpServletBean.getEnvironment(HttpServletBean.java:205)
    at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:126)
    at javax.servlet.GenericServlet.init(GenericServlet.java:158)
    at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1241)
    at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1154)
    at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:827)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:135)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:503)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:136)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
    at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:610)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:526)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1078)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:655)
    at org.apache.coyote.http11.Http11NioProtocol$Http11ConnectionHandler.process(Http11NioProtocol.java:222)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1566)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1523)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Unknown Source)

我附上了所有文件供您参考。

的web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
  <display-name>FirstSpringMVC</display-name>

  <servlet>
    <servlet-name>dispatcher</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
  </servlet>

  <servlet-mapping>
    <servlet-name>dispatcher</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>
</web-app> 

弹簧调度-servlet.xml中

<?xml version="1.0" encoding="UTF-8"?>

<!-- <!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN 2.0//EN" "http://www.springframework.org/dtd/spring-beans-2.0.dtd">
 -->
<beans  
    xmlns="http://www.springframework.org/schema/beans"  
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  
    xmlns:p="http://www.springframework.org/schema/p"  
    xsi:schemaLocation="http://www.springframework.org/schema/beans  
               http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">  
    <!-- Default Handler Mapping -->
    <!-- Default Handler -->

    <bean
        class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"></bean>

    <!-- Controller Mapping -->
    <bean name="/hello.do" class="org.gvp.HelloController"></bean>

    <!-- View Resolver Mapping -->
    <bean
        class="org.springframework.web.servlet.view.InternalResourceViewResolver">

        <property name="prefix">
            <value>/WEB-INF/</value>
        </property>
        <property name="suffix" value=".jsp"></property>
    </bean>
</beans>

HelloController.java

package org.gvp;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.AbstractController;

public class HelloController extends AbstractController 
{

    @Override
    protected ModelAndView handleRequestInternal(HttpServletRequest arg0, HttpServletResponse arg1) throws Exception {
        // TODO Auto-generated method stub
        ModelAndView mv=new ModelAndView("test");
        mv.addObject("msg","Hii KEval");
        return mv;
    }
}

如何解决错误？