maven Spring 4.2+SpringMVC+dubbo解决TypeProxyInvocationHandler.invoke(SerializableTypeWrapper.java:239

java.lang.NullPointerException

org.springframework.core.SerializableTypeWrapper$TypeProxyInvocationHandler.invoke(SerializableTypeWrapper.java:239)

org.springframework.core.$Proxy5.hashCode(Unknown Source)

org.springframework.util.ObjectUtils.nullSafeHashCode(ObjectUtils.java:273)

org.springframework.core.ResolvableType.hashCode(ResolvableType.java:811)

org.springframework.util.ConcurrentReferenceHashMap.getHash(ConcurrentReferenceHashMap.java:214)

org.springframework.util.ConcurrentReferenceHashMap.getReference(ConcurrentReferenceHashMap.java:246)

org.springframework.util.ConcurrentReferenceHashMap.get(ConcurrentReferenceHashMap.java:226)

org.springframework.core.ResolvableType.forType(ResolvableType.java:1186)

org.springframework.core.ResolvableType.forType(ResolvableType.java:1165)

org.springframework.core.ResolvableType.forTypes(ResolvableType.java:844)

org.springframework.core.ResolvableType.getInterfaces(ResolvableType.java:403)

org.springframework.core.ResolvableType.as(ResolvableType.java:365)

org.springframework.core.convert.support.GenericConversionService.getRequiredTypeInfo(GenericConversionService.java:266)

org.springframework.core.convert.support.GenericConversionService.addConverterFactory(GenericConversionService.java:103)

org.springframework.core.convert.support.DefaultConversionService.addScalarConverters(DefaultConversionService.java:79)

org.springframework.core.convert.support.DefaultConversionService.addDefaultConverters(DefaultConversionService.java:63)

org.springframework.core.convert.support.DefaultConversionService.<init>(DefaultConversionService.java:50)

org.springframework.core.env.AbstractPropertyResolver.<init>(AbstractPropertyResolver.java:41)

org.springframework.core.env.PropertySourcesPropertyResolver.<init>(PropertySourcesPropertyResolver.java:41)

org.springframework.core.env.AbstractEnvironment.<init>(AbstractEnvironment.java:112)

org.springframework.core.env.StandardEnvironment.<init>(StandardEnvironment.java:54)

org.springframework.web.context.support.StandardServletEnvironment.<init>(StandardServletEnvironment.java:44)

org.springframework.web.servlet.HttpServletBean.createEnvironment(HttpServletBean.java:215)

org.springframework.web.servlet.HttpServletBean.getEnvironment(HttpServletBean.java:205)

org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:126)

javax.servlet.GenericServlet.init(GenericServlet.java:160)

org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)

org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)

org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)

org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)

org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023)

org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)

org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)

java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)

java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)

java.lang.Thread.run(Thread.java:745)

解决：maven的传递依赖导致spring 4.2与spring 2.5包冲突

<dependency>

    <groupId>com.alibaba</groupId>

    <artifactId>dubbo</artifactId>

    <version>2.5.3</version>

    <exclusions>

        <exclusion>

            <artifactId>spring</artifactId>

            <groupId>org.springframework</groupId>

        </exclusion>

    </exclusions>

</dependency>