No bean named 'SelfController' is defined

具体遇到的问题

No bean named ‘SelfController’ is defined

报错信息的截图

这是项目结构图

这是报错

相关课程内容截图

尝试过的解决思路和结果

spring.xml 没错
核心控制器可以正确输出类名与方法名
类名也没错
注解也没有错

粘贴全部相关代码，切记添加代码注释（请勿截图）

package com.imooc.hospital.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;

    @Override
    public void init() throws ServletException {
        super.init();
        context = new ClassPathXmlApplicationContext("spring.xml");
    }
    @Override
    public void service(ServletRequest servletRequest, ServletResponse servletResponse) throws ServletException, IOException {
        HttpServletRequest request = (HttpServletRequest) servletRequest;
        HttpServletResponse response = (HttpServletResponse) servletResponse;

        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("meethodName======>"+methodName);
        System.out.println();

        Object object = context.getBean(beanName);
        try {
            Method method = object.getClass().getMethod(methodName,HttpServletRequest.class,HttpServletResponse.class);
            method.invoke(object,request,response);
        } catch (NoSuchMethodException e) {
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        } catch (InvocationTargetException e) {
            e.printStackTrace();
        }
    }
}

///==============================================

package com.imooc.hospital.controller;

import com.imooc.hospital.entity.Users;
import com.imooc.hospital.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@Controller("selfController")
public class SelfController {
    @Autowired
    private UserService userService;

    // toLogin.do
    public void toLogin(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        request.getRequestDispatcher("login.jsp").forward(request,response);
    }

    // login.do
    public void login(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        String userName = request.getParameter("username");
        String password = request.getParameter("password");
        Users users = userService.login(userName,password);
        if (userName == null){
            response.sendRedirect("toLogin.do");
        }else {
            request.getSession().setAttribute("USER",users);
            response.sendRedirect("dept/list.do");
        }
    }

    // logout.do
    public void logout(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        request.getSession().setAttribute("USER",null);
        response.sendRedirect("toLogin.do");

    }
}

<?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">

<!--    数据源-->
    <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/hospital?useUnicode=true&amp;characterEncoding=utf-8"/>
        <property name="username" value="root"/>
        <property name="password" value="root"/>
    </bean>
<!--    session工厂-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <property name="typeAliasesPackage" value="com.imooc.hospital.entity"/>
    </bean>

<!--    持久化对象-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.imooc.hospital.dao"/>
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
     </bean>

<!--    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.hospital.service.*.*(..))"/>
        <aop:advisor advice-ref="txAdvice" pointcut-ref="txPointcut"/>
    </aop:config>

<!--    全局自动扫描-->
    <context:component-scan base-package="com.imooc.hospital"/>
    <aop:aspectj-autoproxy/>
</beans>