Dubbo（四）------Dubbo入门示例(基于属性配置)

官方文档：http://dubbo.apache.org/en-us/docs/user/configuration/properties.html

父工程dubbo的依赖文件

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.yi</groupId>
    <artifactId>dubbo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>pom</packaging>

    <modules>
        <module>dubbo-api</module>
        <module>dubbo-consumer</module>
        <module>dubbo-provider</module>
    </modules>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
    </properties>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.4.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
            <!-- JDK版本 -->
            <plugin>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>

        </plugins>

    </build>

</project>

dubbo-api 依赖文件

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.yi</groupId>
    <artifactId>dubbo-api</artifactId>
    <version>1.0-SNAPSHOT</version>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
            <!-- JDK版本 -->
            <plugin>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>

        </plugins>

    </build>

</project>

dubbo-provider 提供方依赖文件

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.yi</groupId>
    <artifactId>dubbo-provider</artifactId>
    <version>0.0.1-SNAPSHOT</version>

    <properties>
        <java.version>1.8</java.version>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

    <parent>
        <groupId>com.yi</groupId>
        <artifactId>dubbo</artifactId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>

    <dependencies>

        <!--引入公共的api-->
        <dependency>
            <groupId>com.yi</groupId>
            <artifactId>dubbo-api</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>

        <!--引入springboot-->
       <!-- <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
            <version>2.1.0.RELEASE</version>
        </dependency>-->

        <!--zookeeper 注册中心客户端引入 使用的是curator客户端 -->
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-dependencies-zookeeper</artifactId>
            <version>2.7.4.1</version>
            <type>pom</type>
            <exclusions>
                <exclusion>
                    <groupId>org.slf4j</groupId>
                    <artifactId>slf4j-log4j12</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

        <!-- dubbo 2.7.x引入-->
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-spring-boot-starter</artifactId>
            <version>2.7.4.1</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-autoconfigure</artifactId>
            <version>2.1.7.RELEASE</version>
            <scope>compile</scope>
        </dependency>

    </dependencies>


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

</project>

dubbo-consumer 依赖文件

<?xml version="1.0" encoding="UTF-8"?>

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.yi</groupId>
    <artifactId>dubbo-consumer</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>


    <parent>
        <groupId>com.yi</groupId>
        <artifactId>dubbo</artifactId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>

    <properties>
        <java.version>1.8</java.version>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

    <dependencies>

        <!--引入公共的api-->
        <dependency>
            <groupId>com.yi</groupId>
            <artifactId>dubbo-api</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>

        <!--&lt;!&ndash;引入springboot&ndash;&gt;
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
            <version>2.1.0.RELEASE</version>
        </dependency>-->

        <!--zookeeper 注册中心客户端引入 使用的是curator客户端 -->
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-dependencies-zookeeper</artifactId>
            <version>2.7.4.1</version>
            <type>pom</type>
            <exclusions>
                <exclusion>
                    <groupId>org.slf4j</groupId>
                    <artifactId>slf4j-log4j12</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <!-- dubbo 2.7.x引入-->
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-spring-boot-starter</artifactId>
            <version>2.7.4.1</version>
        </dependency>

    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

dubbo-api
在这里插入图片描述

package com.yi;

/**
 * 接口
 */
public interface TestService {

    String sayHello(String word);
}

dubbo-provider

package com.yi.service.impl;

import com.yi.TestService;
import org.apache.dubbo.config.annotation.Service;

@Service(version = "1.0.0")
public class TestServiceImpl implements TestService {

    @Override
    public String sayHello(String word) {
        return word;
    }
}

package com.yi;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class ApplicationProvider {
    public static void main(String[] args) {
        SpringApplication.run(ApplicationProvider.class, args);
        System.out.println("dubbo_provider 已启动！");
    }
}

# Spring boot application
spring.application.name=dubbo-provider
# Base packages to scan Dubbo Component: @org.apache.dubbo.config.annotation.Service
dubbo.scan.base-packages=com.yi.service
# Dubbo Application
## The default value of dubbo.application.name is ${spring.application.name}
dubbo.application.name=${spring.application.name}
# Dubbo Protocol
dubbo.protocol.name=dubbo
dubbo.protocol.port=20880
## Dubbo Registry
dubbo.registry.address=zookeeper://127.0.0.1:2181
server.port=8083
#如果有Can't assign address异常需要加vm参数：
#-Djava.net.preferIPv4Stack=true

log4j.rootLogger = INFO, stdout, logfile
#日志输出到控制台
log4j.appender.stdout = org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout = org.apache.log4j.PatternLayout

#日志输出到文件
log4j.appender.logfile = org.apache.log4j.DailyRollingFileAppender
#${webapp.root}WEB-INF/logs/log4j.log 日志文件存放在tomcat编译项目web-inf/log目录下
log4j.appender.logfile.File = ${webapp.root}WEB-INF/logs/log4j.log

#是否追加写进文件
log4j.appender.logfile.Append = true   
#输出DEBUG级别日志到文件中
log4j.appender.logfile.Threshold = DEBUG    
log4j.appender.logfile.layout = org.apache.log4j.PatternLayout
log4j.appender.logfile.layout.ConversionPattern = %d [%t] %-5p %c - %m%n

dubbo-consumer

package com.yi.controller;

import com.yi.TestService;
import org.apache.dubbo.config.annotation.Reference;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class TestController {

    @Reference(version = "1.0.0")
    private TestService service;

    @GetMapping("sayHello")
    public String sayHello() {
        return service.sayHello("hello wrold!");
    }

}

package com.yi;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class ApplicationConsumer {
    public static void main(String[] args) {
        SpringApplication.run(ApplicationConsumer.class, args);
        System.out.println("dubbo_consumer 已启动！");

    }
}

spring.application.name=dubbo_consumer
dubbo.registry.address=zookeeper://127.0.0.1:2181
server.port=8082
#如果有Can't assign address异常需要加vm参数：
#-Djava.net.preferIPv4Stack=true

启动服务之前（先启动zookeeper，先启动zookeeper，先启动zookeeper）

然后依次启动dubbo-provider 、dubbo-consumer

在这里插入图片描述

调用：http://127.0.0.1:8082/sayHello
在这里插入图片描述

项目代码实例下载

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Dubbo（四）------Dubbo入门示例(基于属性配置)

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