优质：https://github.com/JeffLi1993/springboot-learning-example 整合dubbo时最好把spring-boot-dev 依赖去掉,否则 会出现java.lang.ClassCastException: com.neo.service.UserService cannot be cast to com.neo.service.UserService 异常

spring boot 整合dubbo

插件有两个：

• com.alibaba.spring.boot 这个插件有点自有，除了需要引入基本的starter以外还要自己引入zk,和curator，配置如下:

        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>${slf4j-api.version}</version>
        </dependency>
        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-classic</artifactId>
            <version>${logback.version}</version>
        </dependency>
        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-core</artifactId>
            <version>${logback.version}</version>
        </dependency>
        
        <dependency>
            <groupId>com.alibaba.spring.boot</groupId>
            <artifactId>dubbo-spring-boot-starter</artifactId>
            <version>2.0.0</version>
            <exclusions>
                <exclusion>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-starter-actuator</artifactId>
                </exclusion>
                <exclusion>
                    <artifactId>spring-beans</artifactId>
                    <groupId>org.springframework</groupId>
                </exclusion>
                <exclusion>
                    <artifactId>spring-core</artifactId>
                    <groupId>org.springframework</groupId>
                </exclusion>
                <exclusion>
                    <artifactId>spring-context</artifactId>
                    <groupId>org.springframework</groupId>
                </exclusion>
            </exclusions>
        </dependency>
  
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
            <version>${spring.boot.version}</version>
        </dependency>
  
        <dependency>
            <groupId>com.101tec</groupId>
            <artifactId>zkclient</artifactId>
            <version>0.11</version>
        </dependency>
  
        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-framework</artifactId>
            <version>2.12.0</version>
        </dependency>
  

  dubbo配置如下：

    spring.dubbo.server=true
    spring.dubbo.application.name=SpringBootTest
    spring.dubbo.protocol.name=dubbo
    spring.dubbo.registry.address=10.255.72.159:2181
    spring.dubbo.registry.id=registry
    spring.dubbo.registry.protocol=zookeeper
    spring.dubbo.protocol.port=9300
    spring.dubbo.registry.group=zookeeper
  

  在启动类中需要加入 @EnableDubboConfiguration
  在service 实现类中加入@Service (需要是dubbo的),和 @Compoment(不加的话,该类不会放在spring容器中,其他地方有使用的话会报错)

• io.dubbo.springboot 相对上者要简单

    <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>${slf4j-api.version}</version>
        </dependency>
        
      <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.17</version>
      </dependency>
  
     <dependency>
            <groupId>io.dubbo.springboot</groupId>
            <artifactId>spring-boot-starter-dubbo</artifactId>
            <version>${dubbo-spring-boot}</version>
            <exclusions>
                <exclusion>
                    <artifactId>spring-boot-starter</artifactId>
                    <groupId>org.springframework.boot</groupId>
                </exclusion>
            </exclusions>
      </dependency>
  

  配置文件

    spring.dubbo.application.name=SpringBootTest
    spring.dubbo.registry.address=10.255.72.159:2181
    spring.dubbo.registry.protocol=zookeeper
    spring.dubbo.registry.group=zookeeper
    spring.dubbo.protocol.name=dubbo
    spring.dubbo.protocol.port=9300
    #scan选项在生产者方面配置的应该是实现类的包名,消费者配置的应该是使用类的包名
    spring.dubbo.scan=com.xcn.springboottest.dubbo
  

  在service 实现类中加入@Service

项目部署

• 项目部署有2种方式，jar包和war包，jar包方式内嵌servlet容器. war包方式需要结合tomcat。此时需要注意tomcat的版本(jdk,servlet,el-expression)
• 项目打包war包部署，启动类需要如下,继承SpringBootServletInitializer 重写configure方法

public class App extends SpringBootServletInitializer {

   @Override
   protected SpringApplicationBuilder configure(SpringApplicationBuilder builder) {
       //DevourerServiceStarter.class为带有@SpringBootApplication注解的启动类
       return builder.sources(App.class);
   }
}

pom中加入

   <packaging>jar</packaging>
   --------------------------------------------------------- 
   <plugins>
    <plugin>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-maven-plugin</artifactId>
    </plugin>
  </plugins>

• 打包时根据参数打包相应包下的配置,只要涉及resources插件得配置。需要注意的是 filtering 属性,为true的时候，替换配置文件中的一些变量,
• 打jar包