问题描述
我试图进行有关Spring IOC的实验，我编写了ServiceBean以及bean.xml文件。我尝试在我的应用程序中实例化这样的服务bean：
public class SpringTrialApplication {
public static void main(String[] args) throws IOException {
SpringTrialApplication main = new SpringTrialApplication();
Xmlbeanfactory factory = new Xmlbeanfactory(new ClassPathResource("beans.xml",main.getClass().getClassLoader() ));
// use service bean:
ServiceBean service = (ServiceBean)factory.getBean("service");
// com.ServiceBean service = new com.MyServiceBean();
service.addUser("bill","hello");
service.addUser("tom","goodbye");
service.addUser("tracy","morning");
System.out.println("tom's password is: " + service.getpassword("tom"));
if(service.findUser("tom")) {
service.deleteUser("tom");
}
}
}
我可以成功读取bean.xml，但是由于找不到类org.springframework.core.convert.TypeDescriptor而无法创建bean。以下是我的日志：
Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'service' defined in class path resource [beans.xml]: Instantiation of bean Failed; nested exception is java.lang.NoClassDefFoundError: org/springframework/core/convert/TypeDescriptor
at org.springframework.beans.factory.support.AbstractAutowireCapablebeanfactory.instantiateBean(AbstractAutowireCapablebeanfactory.java:955)
at org.springframework.beans.factory.support.AbstractAutowireCapablebeanfactory.createBeanInstance(AbstractAutowireCapablebeanfactory.java:901)
at org.springframework.beans.factory.support.AbstractAutowireCapablebeanfactory.doCreateBean(AbstractAutowireCapablebeanfactory.java:485)
at org.springframework.beans.factory.support.AbstractAutowireCapablebeanfactory.createBean(AbstractAutowireCapablebeanfactory.java:456)
at org.springframework.beans.factory.support.Abstractbeanfactory$1.getobject(Abstractbeanfactory.java:291)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
at org.springframework.beans.factory.support.Abstractbeanfactory.doGetBean(Abstractbeanfactory.java:288)
at org.springframework.beans.factory.support.Abstractbeanfactory.getBean(Abstractbeanfactory.java:190)
at com.SpringTrialApplication.main(SpringTrialApplication.java:27)
Caused by: java.lang.NoClassDefFoundError: org/springframework/core/convert/TypeDescriptor
at org.springframework.beans.factory.support.AbstractAutowireCapablebeanfactory.instantiateBean(AbstractAutowireCapablebeanfactory.java:950)
... 8 more
Caused by: java.lang.classNotFoundException: org.springframework.core.convert.TypeDescriptor
at java.net.urlclassloader.findClass(urlclassloader.java:381)
at java.lang.classLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:338)
at java.lang.classLoader.loadClass(ClassLoader.java:357)
... 9 more
Process finished with exit code 1
和我的beans.xml一样：
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN"
"http://www.springframework.org/dtd/spring-beans.dtd">
<beans>
<bean id="service" class="com.MyServiceBean" />
</beans>
我的工作空间是这样的： directory 我的项目中使用了以下依赖项：
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>3.0.2.RELEASE</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-core -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>2.5.6</version>
</dependency>
是不是因为Spring框架更改了3.x中的内部结构？我该如何解决这个问题？
解决方法
在Question is old,but it's never too late to answer
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和spring-beans中使用相同的版本可以解决问题。