Dubbo（四）------Dubbo入门示例(基于属性配置)

迷南。 2023-06-25 06:21 8阅读 0赞

![11][]

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/> 
        </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>
                
                <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**

**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>
    
            
            <dependency>
                <groupId>com.yi</groupId>
                <artifactId>dubbo-api</artifactId>
                <version>1.0-SNAPSHOT</version>
            </dependency>
    
            
           
    
            
            <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>
    
            
            <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>
    
            
            <dependency>
                <groupId>com.yi</groupId>
                <artifactId>dubbo-api</artifactId>
                <version>1.0-SNAPSHOT</version>
            </dependency>
    
            
    
            
            <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>
            
            <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][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI5OTE0ODM3_size_16_color_FFFFFF_t_70]

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][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI5OTE0ODM3_size_16_color_FFFFFF_t_70 1]

调用：http://127.0.0.1:8082/sayHello  
![在这里插入图片描述][2019122622134048.png]

[项目代码实例下载][Link 1]

--------------------

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[11]: https://img-blog.csdnimg.cn/20191226180248976.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI5OTE0ODM3_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20191226221028176.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI5OTE0ODM3,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI5OTE0ODM3_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/20191226221313259.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI5OTE0ODM3,size_16,color_FFFFFF,t_70
[2019122622134048.png]: https://img-blog.csdnimg.cn/2019122622134048.png
[Link 1]: https://download.csdn.net/download/qq_29914837/12055691