springboot-dubbo-starter的1.x和2.x的使用区别

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1.pom.xml
1.x

<dependency>
	<groupId>io.dubbo.springboot</groupId>
	 <artifactId>spring-boot-starter-dubbo</artifactId>
	 <version>1.0.0</version>
</dependency>

2.x

<dependency>
    <groupId>com.alibaba.boot</groupId>
    <artifactId>dubbo-spring-boot-starter</artifactId>
    <version>0.2.0</version>
</dependency>

2.application.properties
1.x
provider

# dubbo config
spring.dubbo.application.name=provider
spring.dubbo.registry.address=zookeeper://ip:2181
spring.dubbo.protocol.name=dubbo
spring.dubbo.protocol.port=27899
spring.dubbo.scan=org.zhd.data.provider.service.dubbo

consumer

# dubbo config
spring.dubbo.application.name=consumer
spring.dubbo.registry.address=zookeeper://ip:2181
spring.dubbo.scan=org.zhd.consumer.service.dubbo

2.x
provider

# dubbo config
dubbo.scan.basePackages=org.zhd.data.provider.service.dubbo
dubbo.application.id=provider-application
dubbo.application.name=provider-1
dubbo.protocol.id=provider-protocol
dubbo.protocol.name=dubbo
dubbo.protocol.port=27880
dubbo.registry.id=provider-registry
dubbo.registry.address=zookeeper://ip:2181

consumer

# dubbo config
dubbo.application.name=consumer-1
dubbo.registry.address=zookeeper://ip:2181

3.服务实现
OrgDpi 为服务接口
1.x
provider

import com.alibaba.dubbo.config.annotation.Service;
@Service(version = "1.0.1")
public class TestProviderService implements OrgDpi {
	...
}

consumer

@Component
public class TestConsumerService {
    @Reference(version = "1.0.1")
    private OrgDpi orgService;
    ...
}

2.x
provider

@Service(version = "1.0.1", application = "${dubbo.application.id}",
        protocol = "${dubbo.protocol.id}", registry = "${dubbo.registry.id}")
public class TestProviderService implements OrgDpi {
	...
}

consumer

@Component
public class TestConsumerService {
    @Reference(version = "1.0.1", application = "${spring.application.name}",
            registry = "${dubbo.registry.address}")
    private OrgDpi orgService;
    ...
}

4.异常
1.x的测试时
报错：找不到log4j

这是由于pom中springboot的版本较高，而1.x的dubbo-starter关联的zkclient只有0.7版本过低

<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.4.RELEASE</version>

所以在pom中增加高版本的zkclient即可

<dependency>
    <groupId>com.101tec</groupId>
    <artifactId>zkclient</artifactId>
    <version>0.11</version>
</dependency>

报错：

com.alibaba.dubbo.remoting.RemotingException: com.alibaba.dubbo.rpc.RpcException:
 Failed to invoke remote proxy method...
...
Caused by: java.lang.ClassCastException

这是由于pom中存在devtools，导致没法dubbo无法判断类是否一致，删除devtools即可

2.x的测试时没有报错