dubbo和spring结合报错 Error creating bean with name

ApplicationContext.xml

     <!-- 和本地bean一样实现服务 -->     <bean id="demoService" class="com.test.dubboser3.service.impl.UserServiceImp"/>    <!-- dubbo 服务配置 -->      <!-- 提供方应用信息，用于计算依赖关系,这个和client没必要一致 -->    <dubbo:application name="hello-world-app-my" />     <!-- 使用multicast广播注册中心暴露服务地址 -->     <!-- <dubbo:registry address="multicast://192.168.0.101:2181" /> -->     <!-- 使用zookeeper广播注册中心暴露服务地址 -->   <dubbo:registry  protocol="zookeeper"  address="192.168.107.10:2181"/>     <!--和上面的配置是一样的效果  -->     <!-- <dubbo:registry address="zookeeper://192.168.0.101:2181" />  -->     <!-- 本机 伪集群 测试 -->          <!--  <dubbo:registry  protocol="zookeeper"  address="192.168.0.27:2181,192.168.0.27:2182,192.168.0.27:2183"  /> -->     <!-- 用dubbo协议在20880端口暴露服务 -->    <dubbo:protocol name="dubbo" port="20880" />          <!-- 声明需要暴露的服务接口  -->     <dubbo:service registry="0"  interface="com.test.dubboser3.service.UserService"        ref="demoService" /> 

测试类如下：

@Test    public void test(){        ApplicationContext context =                 new ClassPathXmlApplicationContext("config/ApplicationContext.xml");        UserService service = (UserService)context.getBean("demoService");        System.out.println(service.say("sss"));    }

报错如下：Error creating bean with name

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'com.test.dubboser3.service.UserService': Instantiation of bean failed; nested exception is java.lang.ExceptionInInitializerError    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1105)    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1050)    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:510)    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482)    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:305)    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:301)    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:196)    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:772)    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:834)    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:537)    at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)    at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:83)    at com.test.dubboser3.SpringTest.test(SpringTest.java:21)    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)    at java.lang.reflect.Method.invoke(Method.java:606)    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)Caused by: java.lang.ExceptionInInitializerError    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)    at java.lang.reflect.Constructor.newInstance(Constructor.java:526)    at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:147)    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:89)    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1098)    ... 36 moreCaused by: java.lang.IllegalStateException: fail to create adaptive instance: java.lang.IllegalStateException: Can not create adaptive extenstion interface com.alibaba.dubbo.rpc.Protocol, cause: Failed to load extension class(interface: interface com.alibaba.dubbo.common.compiler.Compiler, class line: com.alibaba.dubbo.common.compiler.support.JavassistCompiler) in jar:file:/D:/maven-repository/com/alibaba/dubbo/2.5.3/dubbo-2.5.3.jar!/META-INF/dubbo/internal/com.alibaba.dubbo.common.compiler.Compiler, cause: javassist/ClassPath    at com.alibaba.dubbo.common.extension.ExtensionLoader.getAdaptiveExtension(ExtensionLoader.java:459)    at com.alibaba.dubbo.config.ServiceConfig.<clinit>(ServiceConfig.java:60)    ... 43 moreCaused by: java.lang.IllegalStateException: Can not create adaptive extenstion interface com.alibaba.dubbo.rpc.Protocol, cause: Failed to load extension class(interface: interface com.alibaba.dubbo.common.compiler.Compiler, class line: com.alibaba.dubbo.common.compiler.support.JavassistCompiler) in jar:file:/D:/maven-repository/com/alibaba/dubbo/2.5.3/dubbo-2.5.3.jar!/META-INF/dubbo/internal/com.alibaba.dubbo.common.compiler.Compiler, cause: javassist/ClassPath    at com.alibaba.dubbo.common.extension.ExtensionLoader.createAdaptiveExtension(ExtensionLoader.java:723)    at com.alibaba.dubbo.common.extension.ExtensionLoader.getAdaptiveExtension(ExtensionLoader.java:455)    ... 44 moreCaused by: java.lang.IllegalStateException: Failed to load extension class(interface: interface com.alibaba.dubbo.common.compiler.Compiler, class line: com.alibaba.dubbo.common.compiler.support.JavassistCompiler) in jar:file:/D:/maven-repository/com/alibaba/dubbo/2.5.3/dubbo-2.5.3.jar!/META-INF/dubbo/internal/com.alibaba.dubbo.common.compiler.Compiler, cause: javassist/ClassPath    at com.alibaba.dubbo.common.extension.ExtensionLoader.loadFile(ExtensionLoader.java:685)    at com.alibaba.dubbo.common.extension.ExtensionLoader.loadExtensionClasses(ExtensionLoader.java:591)    at com.alibaba.dubbo.common.extension.ExtensionLoader.getExtensionClasses(ExtensionLoader.java:567)    at com.alibaba.dubbo.common.extension.ExtensionLoader.getAdaptiveExtensionClass(ExtensionLoader.java:728)    at com.alibaba.dubbo.common.extension.ExtensionLoader.createAdaptiveExtension(ExtensionLoader.java:721)    at com.alibaba.dubbo.common.extension.ExtensionLoader.getAdaptiveExtension(ExtensionLoader.java:455)    at com.alibaba.dubbo.common.extension.ExtensionLoader.createAdaptiveExtensionClass(ExtensionLoader.java:738)    at com.alibaba.dubbo.common.extension.ExtensionLoader.getAdaptiveExtensionClass(ExtensionLoader.java:732)    at com.alibaba.dubbo.common.extension.ExtensionLoader.createAdaptiveExtension(ExtensionLoader.java:721)    ... 45 moreCaused by: java.lang.NoClassDefFoundError: javassist/ClassPath    at java.lang.Class.forName0(Native Method)    at java.lang.Class.forName(Class.java:270)    at com.alibaba.dubbo.common.extension.ExtensionLoader.loadFile(ExtensionLoader.java:627)    ... 53 moreCaused by: java.lang.ClassNotFoundException: javassist.ClassPath    at java.net.URLClassLoader$1.run(URLClassLoader.java:366)    at java.net.URLClassLoader$1.run(URLClassLoader.java:355)    at java.security.AccessController.doPrivileged(Native Method)    at java.net.URLClassLoader.findClass(URLClassLoader.java:354)    at java.lang.ClassLoader.loadClass(ClassLoader.java:425)    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)    at java.lang.ClassLoader.loadClass(ClassLoader.java:358)    ... 56 more

注释这一行能spring初始化成功：

<dubbo:service registry="0"  interface="com.test.dubboser3.service.UserService"        ref="demoService" /> 

这里犯了一个错误，dubbo服务提供者需要用到注册的服务，需要想提供者那样引用该服务。

<dubbo:reference id="sampleService" check="false"  interface="bhz.dubbo.sample.provider.SampleService" />

提供者不能通过getBean得到自己提供的服务。其实就是用错了dubbo:service 、dubbo:reference导致上述报错，没有真正理解服务提供和消费的正确使用。