org.springframework.beans.factory.CannotLoadBeanClassException 问题怎么解决

[鬼才天子]

自己刚开始学习spring框架，写了个类
package src.du.bean;

public class MessageBean {

private String moduleName;
private int pageSize;
private String username;
private String password;
public String getModuleName() {
return moduleName;
}
public void setModuleName(String moduleName) {
this.moduleName = moduleName;
}
public int getPageSize() {
return pageSize;
}
public void setPageSize(int pageSize) {
this.pageSize = pageSize;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}

public String execute(){
System.out.println("moduleName:" + moduleName);
System.out.println("pageSize:" + pageSize);
System.out.println("username:" + username);
System.out.println("password:" + password);
return null;

}
}
下面是applicationContext.xml文件配置的信息
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd">

<bean id="messageBean" class="org.du.bean.MessageBean">
<property name="moduleName" value="资费管理"></property>
<property name="pageSize" value="5"></property>
<property name="username" value="scott"></property>
<property name="password" value="tiger"></property>
</bean>
</beans>
写了个测试方法
package src.du.test;

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

import src.du.bean.MessageBean;

public class Test1 {
public static void main(String[] args) {
String conf = "applicationContext.xml";
ApplicationContext ac = new ClassPathXmlApplicationContext(conf);
MessageBean message = ac.getBean("messageBean",MessageBean.class);
message.execute();
}
}
运行后报下面的异常，百度了好久没有解决，请大神帮忙解决下，谢谢！
八月 13, 2017 11:06:07 下午 org.springframework.context.support.AbstractApplicationContext prepareRefresh
信息: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@41cf53f9: startup date [Sun Aug 13 23:06:07 CST 2017]; root of context hierarchy
八月 13, 2017 11:06:07 下午 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
信息: Loading XML bean definitions from class path resource [applicationContext.xml]
八月 13, 2017 11:06:07 下午 org.springframework.beans.factory.support.DefaultListableBeanFactory preInstantiateSingletons
信息: Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@6442b0a6: defining beans [messageBean]; root of factory hierarchy
八月 13, 2017 11:06:07 下午 org.springframework.beans.factory.support.DefaultSingletonBeanRegistry destroySingletons
信息: Destroying singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@6442b0a6: defining beans [messageBean]; root of factory hierarchy
Exception in thread "main" org.springframework.beans.factory.CannotLoadBeanClassException: Cannot find class [org.du.bean.MessageBean] for bean with name 'messageBean' defined in class path resource [applicationContext.xml]; nested exception is java.lang.ClassNotFoundException: org.du.bean.MessageBean
at org.springframework.beans.factory.support.AbstractBeanFactory.resolveBeanClass(AbstractBeanFactory.java:1275)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.predictBeanType(AbstractAutowireCapableBeanFactory.java:575)
at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:1344)
at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:910)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:609)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:932)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:479)
at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)
at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:83)
at src.du.test.Test1.main(Test1.java:11)
Caused by: java.lang.ClassNotFoundException: org.du.bean.MessageBean
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at org.springframework.util.ClassUtils.forName(ClassUtils.java:260)
at org.springframework.beans.factory.support.AbstractBeanDefinition.resolveBeanClass(AbstractBeanDefinition.java:416)
at org.springframework.beans.factory.support.AbstractBeanFactory.doResolveBeanClass(AbstractBeanFactory.java:1296)
at org.springframework.beans.factory.support.AbstractBeanFactory.resolveBeanClass(AbstractBeanFactory.java:1267)
... 9 more

[李德胜1995]

Caused by: java.lang.ClassNotFoundException: org.du.bean.MessageBean.... <bean id="messageBean" class="org.du.bean.MessageBean">改为src.du.bean.MessageBean试试。。。

[qq_40046110]

朋友你配置文件的class路径再检查一下