org.apache.commons.logging.LogConfigurationException：java.lang.NullPointerException（由java.lang.NullPointerException引起）

Question

我收到此错误，在“

下面给出

Exception in thread "main" org.apache.commons.logging.LogConfigurationException: org.apache.commons.logging.LogConfigurationException: java.lang.NullPointerException (Caused by java.lang.NullPointerException) (Caused by org.apache.commons.logging.LogConfigurationException: java.lang.NullPointerException (Caused by java.lang.NullPointerException))
    at org.apache.commons.logging.impl.LogFactoryImpl.newInstance(LogFactoryImpl.java:543)
    at org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:235)
    at org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:209)
    at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:351)
    at org.springframework.context.support.AbstractApplicationContext.<init>(AbstractApplicationContext.java:161)
    at org.springframework.context.support.AbstractRefreshableApplicationContext.<init>(AbstractRefreshableApplicationContext.java:90)
    at org.springframework.context.support.AbstractRefreshableConfigApplicationContext.<init>(AbstractRefreshableConfigApplicationContext.java:59)
    at org.springframework.context.support.AbstractXmlApplicationContext.<init>(AbstractXmlApplicationContext.java:61)
    at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:136)
    at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:83)
    at com.student.test.aop.AOPmain.main(AOPmain.java:11)
Caused by: org.apache.commons.logging.LogConfigurationException: java.lang.NullPointerException (Caused by java.lang.NullPointerException)
    at org.apache.commons.logging.impl.LogFactoryImpl.getLogConstructor(LogFactoryImpl.java:397)
    at org.apache.commons.logging.impl.LogFactoryImpl.newInstance(LogFactoryImpl.java:529)
    ... 10 more
Caused by: java.lang.NullPointerException
    at org.apache.commons.logging.impl.LogFactoryImpl.getLogConstructor(LogFactoryImpl.java:374)
    ... 11 more

我已经包含了jar的“com.springsource.org.apache.commons.logging-1.1.1.jar”和“com.springsource.org.apache.log4j-1.2.15.jar”，但无法找出这个错误即将到来的原因。

请帮帮我....解决这个问题..

这是我的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:p="http://www.springframework.org/schema/p"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
       http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.0.xsd 
       http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd">

<aop:aspectj-autoproxy/>
<bean name="triangle" class="com.student.test.aop.model.Triangle">
    <property name="name" value="Triangle name"/>
</bean>

<bean name="circle" class="com.student.test.aop.model.Circle">
    <property name="name" value="Circle name"/>
</bean>

<bean name="shapeService" class="com.student.test.aop.service.ShapeService" autowire="byName"/>

<bean name="loggingAspect" class="com.student.test.aop.aspect.LoggingAspect"/>
</beans>