代码和老师的完全一样，视频看了好几遍了，测试的时候报错：java.lang.IllegalStateException: Failed to load ApplicationContext

我把 ApplicationContext.xml文件中定义的bean注释掉，

<?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">

        <!-- 引入外部属性文件 -->

        <context:property-placeholder location="classpath:jdbc.properties"/>

        <!-- 配置C3P0的连接池 -->

        <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">

        <property name="driverClass" value="${jdbc.driverClass}"></property>

        <property name="jdbcUrl" value="${jdbc.url}"></property>

        <property name="user" value="${jdbc.username}"></property>

        <property name="password" value="${jdbc.password}"></property>

        </bean>

        <!-- 配置业务层的类 -->

<!--         <bean id="accountService" class="com.demo1.AccountServiceImpl">

        <property name="accountDAO" ref="accountDAO"></property> 

        </bean> -->

        <!-- 配置DAO类 -->

<!--         <bean id="accountDAO" class="com.demo1.AccountDAOImpl">

        <property name="dataSource" ref="dataSource"/>

        </bean> -->

</beans>

再把SpringDemo1.java改成这样

@RunWith(SpringJUnit4ClassRunner.class)

@ContextConfiguration("classpath:applicationContext.xml")

public class SpringDemo1 {

//测试业务层的类

// @Resource(name="accountService")

// private AccountService accountService;

//

// public void setAccountService(AccountService accountService) {

// this.accountService = accountService;

// }

@Test

public void demo1(){

//accountService.transfer("aaa", "bbb", 200d);

System.out.println("测试能打印输出吗？");

}

}

结果就是正确的运行测试

SpringDemo1.java文件和上面一样，然后把ApplicationContext.xml里的bean注释去掉，结果就报错