一.环境说明

• Windows 10 1709
• JDK 1.8.0_144
• IDEA 2017.3
• Dubbo 2.5.7
• Zookeeper 3.4.10
• SpringMVC 4.3.12.RELEASE
• Maven 3.5.0

二.问题说明

由于我的IDEA在使用xml配置式配置dubbo远程服务的时候,总是会报个红线,提示这个dubbo的服务bean不存在.虽然不影响运行与实际效果,但本着追求极致的宗旨,总得做点什么消除红线.今天得空,研究了下dubbo的基于注解的配置,也参考了大量前辈的博客,特整理出一份本人亲测没问题的方法,给遇到同样问题的或者想要使用基于注解的方法的同行们提供便利.

三.那就开始吧

dubbo服务的提供方(Provider)

import com.alibaba.dubbo.config.annotation.Service;
import org.springframework.stereotype.Component;

...
//最好将dubbo的service放在spring的上面,不然好像会出问题
@Service
@Component
public class ContentCategoryServiceImpl implements ContentCategoryService {
...
}

服务方的spring配置文件

<?xml version="1.0" encoding="UTF-8"?>
<!--Spring的约束文件 使用那些模块就标记那些模块的约束文档 -->
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:dubbo="http://code.alibabatech.com/schema/dubbo"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/aop
        http://www.springframework.org/schema/aop/spring-aop.xsd
        http://www.springframework.org/schema/tx
        http://www.springframework.org/schema/tx/spring-tx.xsd
        http://code.alibabatech.com/schema/dubbo
        http://code.alibabatech.com/schema/dubbo/dubbo.xsd">

    <!--扫描service -->
    <!--先让spring扫描,再让dubbo扫描 -->
    <context:component-scan base-package="xin.csqsx.content.service.impl"/>
          

    <!--使用dubbo发布服务 -->
    <!--扫描dubbo的service注解 -->
    <dubbo:annotation package="xin.csqsx.content.service.impl" />
    <!--提供方应用信息,用于计算依赖关系 -->
    <dubbo:application name="ddshop_content_service"/>
    <dubbo:registry protocol="zookeeper" address="zookeeper服务所在服务器的ip地址:2181" />
    <!--用dubbo协议暴露20880端口 -->
    <dubbo:protocol name="dubbo" port="20880" />
    <!--设置超时时间 -->
    <dubbo:provider timeout="600000" />
    <!--声明需要暴露的服务接口 -->
    <dubbo:service interface="xin.csqsx.content.service.ContentCategoryService" ref="contentCategoryServiceImpl" />
    <dubbo:service interface="xin.csqsx.content.service.ContentService" ref="contentServiceImpl" />
</beans>

dubbo服务的消费者(customer)

springMVC的配置文件

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:dubbo="http://code.alibabatech.com/schema/dubbo"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd
        http://code.alibabatech.com/schema/dubbo
        http://code.alibabatech.com/schema/dubbo/dubbo.xsd">


    <mvc:annotation-driven />
       
    <!--放行静态资源 -->
    <mvc:default-servlet-handler/>
    <!--先让dubbo扫描controller层,可以避免出现NullPoint空指针问题 -->
    <dubbo:annotation package="xin.csqsx.manager.controller" />
    <!--配置扫描包 -->
    <context:component-scan base-package="xin.csqsx.manager.controller"/>
    <!--引用dubbo服务 -->
    <dubbo:application name="ddshop_manager_web" />

    <!--设置超时时间 -->
    <dubbo:consumer timeout="600000" />
    <dubbo:registry protocol="zookeeper" address="zookeeper所在服务器的ip地址:2181" />
   
    <!--视图解析器 -->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/html/"/>
        <property name="suffix" value=".html"/>
    </bean>

    
</beans>

dubbo消费者端controller层

import com.alibaba.dubbo.config.annotation.Reference;
import org.springframework.stereotype.Controller;

@Controller
@RequestMapping("/advent")
public class AdventController {

	//使用reference注解注入dubbo服务
    @Reference
    private ContentCategoryService contentCategoryService;

这样应该就能完成了

---

2017/11/22
Slicenfer