不同服务开发实战

1、新建一个空白项目

2、在空白项目下，新建2个springboot-web模块

新建 provider-server 和 consumer-server 模块，模拟提供者和消费者服务。

新建 service 包，包下编写服务接口。

项目目录：

TicketService

package com.allen.service;

public interface TicketService {

    public String getTicket();
}

TicketServiceImpl

package com.allen.service;

/**
 * @author Allen
 * @date 2021/1/5 20:32
 */
public class TicketServiceImpl implements TicketService {

    @Override
    public String getTicket() {
        return "allen";
    }
}

UserService

3、导入依赖

pom.xml

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.4.1</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.allen</groupId>
    <artifactId>provider-server</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>provider-server</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>11</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!--导入依赖 zookeeper + dubbo-->
        <!-- https://mvnrepository.com/artifact/org.apache.dubbo/dubbo-spring-boot-starter -->
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-spring-boot-starter</artifactId>
            <version>2.7.8</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/com.github.sgroschupf/zkclient -->
        <dependency>
            <groupId>com.github.sgroschupf</groupId>
            <artifactId>zkclient</artifactId>
            <version>0.1</version>
        </dependency>
        <!--解决log4j依赖冲突-->
        <!-- https://mvnrepository.com/artifact/org.apache.curator/curator-framework -->
        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-framework</artifactId>
            <version>5.1.0</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.apache.curator/curator-recipes -->
        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-recipes</artifactId>
            <version>5.1.0</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.apache.zookeeper/zookeeper -->
        <dependency>
            <groupId>org.apache.zookeeper</groupId>
            <artifactId>zookeeper</artifactId>
            <version>3.6.2</version>
            <!--排除这个slf4j-log4j12-->
            <exclusions>
                <exclusion>
                    <groupId>org.slf4j</groupId>
                    <artifactId>slf4j-log4j12</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

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

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

</project>

4、配置提供者的 application.properties

server.port=8001

# 服务中心名字
dubbo.application.name=provider-server
# 注册中心地址
dubbo.registry.address=zookeeper://127.0.0.1:2181
# 哪些服务要被注册
dubbo.scan.base-packages=com.allen.service

5、配置注解，启动提供者服务主启动类

package com.allen.service;

import org.apache.dubbo.config.annotation.DubboService;
import org.springframework.stereotype.Component;

@DubboService
@Component
public class TicketServiceImpl implements TicketService {

    @Override
    public String getTicket() {
        return "allen";
    }
}

启动提供者服务主启动类 ProviderServerApplication

6、开启zookeeper服务，开启dubbo监听

监听界面如下：

7、开启消费者服务

7.1、配置消费者的 application.properties

server.port=8002

# 消费者去哪里拿服务，需要暴露自己的名字
dubbo.application.name=consumer-server
# 注册中心地址
dubbo.registry.address=zookeeper://127.0.0.1:2181

7.2、将提供者的接口 TicketService 拷贝到消费者对应目录下

7.3、编写 UserService 类

UserService(注解)

package com.allen.service;

import org.apache.dubbo.config.annotation.DubboReference;
import org.springframework.stereotype.Service;

/**
 * @author Allen
 * @date 2021/1/5 20:37
 */
@Service
public class UserService {

    //引用，pom坐标
    @DubboReference
    TicketService ticketService;

    public void buyTicket(){
        String ticket = ticketService.getTicket();
    }
}