学习Spring2.0时遇到的问题解释

在学习Spring2.0的时候遇到了几个问题，总是解决不了，最后在网上搜索后找到了解决的办法，原因是未导入相应的包
以下是我在网上找到的几条错误

错误语句1：Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/logging/LogFactory at org.springframework.util.ClassUtils.<clinit>(ClassUtils.java:67)   at org.springframework.core.io.DefaultResourceLoader.<init>(DefaultResourceLoader.java:52) at org.springframework.context.support.AbstractApplicationContext.<init>(AbstractApplicationContext.java:184) at org.springframework.context.support.AbstractRefreshableApplicationContext.<init>(AbstractRefreshableApplicationContext.java:80) at org.springframework.context.support.AbstractXmlApplicationContext.<init>(AbstractXmlApplicationContext.java:58)   at
需要加上：commons-logging.jar log4j-1.2.11.jar

错误语句2：Exception in thread "main" org.springframework.beans.factory.BeanDefinitionStoreException: Unexpected exception parsing XML document from class path resource [text.xml]; nested exception is java.lang.NoClassDefFoundError: org/aspectj/weaver/reflect/ReflectionWorld$ReflectionWorldException
Caused by: java.lang.NoClassDefFoundError: org/aspectj/weaver/reflect/ReflectionWorld$ReflectionWorldException
    at java.lang.Class.forName0(Native Method)
需要加上：aspectjweaver.jar

错误语句3：Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'logBean' defined in class path resource [text.xml]: Initialization of bean failed; nested exception is org.springframework.aop.framework.AopConfigException: Cannot proxy target class because CGLIB2 is not available. Add CGLIB to the class path or specify proxy interfaces.
Caused by: org.springframework.aop.framework.AopConfigException: Cannot proxy target class because CGLIB2 is not available. Add CGLIB to the class path or specify proxy interfaces.
需要加上：cglib-2.1.3.jar

错误语句4：xception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'logBean' defined in class path resource [text.xml]: Initialization of bean failed; nested exception is java.lang.NoClassDefFoundError: org/objectweb/asm/Type
Caused by: java.lang.NoClassDefFoundError: org/objectweb/asm/Type
    at net.sf.cglib.core.TypeUtils.parseType(TypeUtils.java:180)
需要加上：asm.jar