dubbo 2.5.4 在JDK8下启动错误

错误日志：

ERROR context.ContextLoader - Context initialization failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'uriBrokerService': Cannot create inner bean '(inner bean)' of type [com.alibaba.citrus.service.uribroker.impl.URIBrokerServiceImpl$URIBrokerInfo] while setting bean property 'brokers' with key [0]; nested excepti
on is org.springframework.beans.factory.BeanCreationException: Error creating bean with name '(inner bean)#25': Cannot create inner bean 'server' of type [com.alibaba.citrus.service.uribroker.uri.GenericURIBroker] while setting constructor argument; nested exception is org.springframework.beans.fact
ory.BeanCreationException: Error creating bean with name 'server': Error setting property values; nested exception is org.springframework.beans.NotWritablePropertyException: Invalid property 'URIType' of bean class [com.alibaba.citrus.service.uribroker.uri.GenericURIBroker]: Bean property 'URIType'
is not writable or has an invalid setter method. Does the parameter type of the setter match the return type of the getter?
        at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveInnerBean(BeanDefinitionValueResolver.java:230)
        at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:122)
        at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveManagedList(BeanDefinitionValueResolver.java:287

解决方案：

1、webx的依赖改为3.1.6版；

<dependency> 
    <groupId>com.alibaba.citrus</groupId> 
    <artifactId>citrus-webx-all</artifactId> 
    <version>3.1.6</version> 
</dependency>

2、添加velocity的依赖，我用了1.7；

<dependency>
       <groupId>org.apache.velocity</groupId>
       <artifactId>velocity</artifactId>
       <version>1.7</version>
 </dependency>

3、对依赖项dubbo添加exclusion，避免引入旧spring；

<dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>dubbo</artifactId>
        <version>${project.parent.version}</version>
        <exclusions>
            <exclusion>
                <groupId>org.springframework</groupId>
                <artifactId>spring</artifactId>
            </exclusion>
        </exclusions>
    </dependency>

4、webx已有spring 3以上的依赖，因此注释掉dubbo-admin里面的spring依赖；

<!--<dependency>-->
        <!--<groupId>org.springframework</groupId>-->
        <!--<artifactId>spring</artifactId>-->
    <!--</dependency>-->

http://my.oschina.net/ihanfeng/blog/525274

https://github.com/alibaba/dubbo/issues/50

我使用的是JDK 1.8.0_05, dubbo-admin版本是2.5.4-SNAPSHOT，也遇到了一样的问题。解决方案如 ：

1、webx的依赖改为3.1.6版；

<dependency>
        <groupId>com.alibaba.citrus</groupId>
        <artifactId>citrus-webx-all</artifactId>
        <version>3.1.6</version>
    </dependency>

2、添加velocity的依赖，我用了1.7；

<dependency>
        <groupId>org.apache.velocity</groupId>
        <artifactId>velocity</artifactId>
        <version>1.7</version>
    </dependency>

3、对依赖项dubbo添加exclusion，避免引入旧spring

<dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>dubbo</artifactId>
        <version>${project.parent.version}</version>
        <exclusions>
            <exclusion>
                <groupId>org.springframework</groupId>
                <artifactId>spring</artifactId>
            </exclusion>
        </exclusions>
    </dependency>

4、webx已有spring 3以上的依赖，因此注释掉dubbo-admin里面的spring依赖

<!--<dependency>-->
        <!--<groupId>org.springframework</groupId>-->
        <!--<artifactId>spring</artifactId>-->
    <!--</dependency>-->

确定war包解压后lib目录没有spring 3 以下的依赖就行。然后运行正常了。