测试核心控制器 500错误

错误信息

Type 异常报告

消息 No bean named 'selfController' is defined

描述 服务器遇到一个意外的情况，阻止它完成请求。

Exception

org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'selfController' is defined
org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanDefinition(DefaultListableBeanFactory.java:638)
org.springframework.beans.factory.support.AbstractBeanFactory.getMergedLocalBeanDefinition(AbstractBeanFactory.java:1159)
org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:282)
org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:195)
org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:973)
com.imooc.sm.global.DispatcherServlet.service(DispatcherServlet.java:48)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
com.imooc.sm.global.EncodingFilter.doFilter(EncodingFilter.java:18)

Note 主要问题的全部 stack 信息可以在 server logs 里查看

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首先执行的是show.do,错误之后我在控制器类里加输出beanName和mothodName，控制台显示

Connected to server
[2019-10-17 11:30:52,300] Artifact sm_web:war: Artifact is being deployed, please wait...
17-Oct-2019 11:30:53.336 信息 [RMI TCP Connection(3)-127.0.0.1] org.apache.jasper.servlet.TldScanner.scanJars 至少有一个JAR被扫描用于TLD但尚未包含TLD。 为此记录器启用调试日志记录，以获取已扫描但未在其中找到TLD的完整JAR列表。 在扫描期间跳过不需要的JAR可以缩短启动时间和JSP编译时间。
17-Oct-2019 11:30:53.536 警告 [RMI TCP Connection(3)-127.0.0.1] org.apache.catalina.util.SessionIdGeneratorBase.createSecureRandom Creation of SecureRandom instance for session ID generation using [SHA1PRNG] took [178] milliseconds.
[2019-10-17 11:30:53,559] Artifact sm_web:war: Artifact is deployed successfully
[2019-10-17 11:30:53,559] Artifact sm_web:war: Deploy took 1,259 milliseconds
17-Oct-2019 11:31:00.493 信息 [http-nio-8080-exec-5] org.springframework.context.support.ClassPathXmlApplicationContext.prepareRefresh Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@3f933e83: startup date [Thu Oct 17 11:31:00 CST 2019]; root of context hierarchy
17-Oct-2019 11:31:00.534 信息 [http-nio-8080-exec-5] org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions Loading XML bean definitions from class path resource [spring.xml]
17-Oct-2019 11:31:00.832 警告 [http-nio-8080-exec-5] org.mybatis.spring.mapper.ClassPathMapperScanner.doScan No MyBatis mapper was found in '[com.imooc.sm.dao]' package. Please check your configuration.
17-Oct-2019 11:31:00.897 信息 [http-nio-8080-exec-5] org.springframework.jdbc.datasource.DriverManagerDataSource.setDriverClassName Loaded JDBC driver: com.mysql.cj.jdbc.Driver
beanName:selfController
mothodName:show
17-Oct-2019 11:31:02.187 信息 [Catalina-utility-1] org.apache.catalina.startup.HostConfig.deployDirectory 把web 应用程序部署到目录 [D:\MYSDE\apache-tomcat-9.0.24\webapps\manager]
17-Oct-2019 11:31:02.211 信息 [Catalina-utility-1] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory [D:\MYSDE\apache-tomcat-9.0.24\webapps\manager] has finished in [24] ms

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以下是我的spring.xml

<?xml version="1.0" encoding="UTF-8" ?>
<beans xmlns="http://www.springframework.org/schema/beans"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xmlns:context="http://www.springframework.org/schema/context"
      xmlns:aop="http://www.springframework.org/schema/aop"
      xmlns:tx="http://www.springframework.org/schema/tx"
      xsi:schemaLocation="http://www.springframework.org/schema/beans
   http://www.springframework.org/schema/beans/spring-beans.xsd
   http://www.springframework.org/schema/context
   http://www.springframework.org/schema/context/spring-context.xsd
   http://www.springframework.org/schema/aop
   http://www.springframework.org/schema/aop/spring-aop.xsd
   http://www.springframework.org/schema/tx
   http://www.springframework.org/schema/tx/spring-tx.xsd">
   <!-- Spring整合Mybatis -->
   <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
       <property name="driverClassName" value="com.mysql.cj.jdbc.Driver"/>
       <property name="url" value="jdbc:mysql://localhost:3306/sm?useUnicode=true&amp;characterEncoding=utf-8"/>
       <property name="username" value="root"/>
       <property name="password" value="clown3rd"/>
   </bean>
   <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
       <property name="dataSource" ref="dataSource"/>
       <property name="typeAliasesPackage" value="com.imooc.sm.entity"/>
   </bean>
   <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
       <property name="basePackage" value="com.imooc.sm.dao"/>
       <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
   </bean>
   <!-- 声明式事务 -->
   <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
       <property name="dataSource" ref="dataSource"/>
   </bean>
   <tx:advice id="txAdvice" transaction-manager="transactionManager">
       <tx:attributes>
           <tx:method name="get*" read-only="true"/>
           <tx:method name="find*" read-only="true"/>
           <tx:method name="search*" read-only="true"/>
           <tx:method name="*" propagation="REQUIRED"/>
       </tx:attributes>
   </tx:advice>
   <aop:config>
       <aop:pointcut id="txPointcut" expression="execution(* com.imooc.sm.service.*.*(..))"/>
       <aop:advisor advice-ref="txAdvice" pointcut-ref="txPointcut"/>
   </aop:config>
   <!-- 全局扫描 -->
   <context:component-scan base-package="com.imooc.sm"/>
   <aop:aspectj-autoproxy/>
</beans>

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以下是核心控制器类的代码

package com.imooc.sm.global;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import javax.servlet.GenericServlet;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

public class DispatcherServlet extends GenericServlet {

   private ApplicationContext context;

   public void init() throws ServletException {
       super.init();
       context = new ClassPathXmlApplicationContext("spring.xml");
   }

   public void service(ServletRequest servletRequest, ServletResponse servletResponse) throws ServletException, IOException {
       HttpServletRequest request = (HttpServletRequest) servletRequest;
       HttpServletResponse response = (HttpServletResponse) servletResponse;

       /*
              staff/add.do        login.do
              staffController
              public void add(HttpServletRequest request, HttpServletResponse response){}
       *
        */
       String path = request.getServletPath().substring(1);
       String beanName = null;
       String methodName = null;
       int index = path.indexOf('/');
       if (index != -1) {
           beanName = path.substring(0, index) + "Controller";
           methodName = path.substring(index + 1, path.indexOf(".do"));
       } else {
           beanName = "selfController";
           methodName = path.substring(0, path.indexOf(".do"));
       }
       System.out.println("beanName:" + beanName);
       System.out.println("mothodName:" + methodName);
       Object obj = context.getBean(beanName);
       try {
           Method method = obj.getClass().getMethod(methodName,HttpServletRequest.class,HttpServletResponse.class);
           method.invoke(obj,request,response);
       } catch (NoSuchMethodException e) {
           e.printStackTrace();
       } catch (IllegalAccessException e) {
           e.printStackTrace();
       } catch (InvocationTargetException e) {
           e.printStackTrace();
       }
   }
}