首先创建一个 springboot 父项目

<?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>
    <modules>
        <module>order</module>
        <module>stock</module>
    </modules>
    <parent>
        <!-- springboot的版本管理器 -->
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.6.1</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.example</groupId>
    <artifactId>springcloudalibaba</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>springcloudalibaba</name>
    <!-- 这里打包方式设置为pom，就不会打包父项目，只会打包下面的子项目 -->
    <packaging>pom</packaging>
    <description>springcloudalibaba</description>
    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <!-- springboot基本场景启动器 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </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>

 

在这个项目下创建子 maven 项目

<?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">
    <parent>
        <artifactId>springcloudalibaba</artifactId>
        <groupId>com.example</groupId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>order</artifactId>
    <description>商品订单模块</description>

    <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
    </properties>

    <dependencies>
        <!-- web场景启动器，添加完可以使用MVC -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
    </dependencies>

</project>

<?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>
    <modules>
        <module>order</module>
        <module>stock</module>
    </modules>
    <parent>
        <!-- springboot的版本管理器 -->
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.6.1</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.example</groupId>
    <artifactId>springcloudalibaba</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>springcloudalibaba</name>
    <!-- 这里打包方式设置为pom，就不会打包父项目，只会打包下面的子项目 -->
    <packaging>pom</packaging>
    <description>springcloudalibaba</description>
    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <!-- springboot基本场景启动器 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </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>

 

业务代码

order服务

/**
 * @Description:
 * @Author: LH
 * @Date: 2021/12/04/4:30 下午
 */
@SpringBootApplication
public class OrderApplication {

    public static void main(String[] args) {
        SpringApplication.run(OrderApplication.class,args);
    }

    // 用于远程调用的template，使用建造者模式
    @Bean
    public RestTemplate restTemplate(RestTemplateBuilder builder) {
        RestTemplate restTemplate = builder.build();
        return restTemplate;
    }
}

 

/**
 * @Description:
 * @Author: LH
 * @Date: 2021/12/04/4:18 下午
 */
@RestController
@RequestMapping("/order")
public class OrderController {

    @Autowired
    RestTemplate restTemplate;

    @RequestMapping("/add")
    public String add() {
        System.out.println("下单成功！");
        String msg = restTemplate.getForObject("http://localhost:8082/stock/reduct", String.class);
        return "Hello World!" + msg;
    }

}

 

stock服务

/**
 * @Description:
 * @Author: LH
 * @Date: 2021/12/04/4:32 下午
 */
@SpringBootApplication
public class StockApplication {

    public static void main(String[] args) {
        SpringApplication.run(StockApplication.class,args);
    }
}

 

/**
 * @Description:
 * @Author: LH
 * @Date: 2021/12/04/4:21 下午
 */
@RestController
@RequestMapping("/stock")
public class StockController {

    @RequestMapping("/reduct")
    public String reduct() {
        System.out.println("扣减库存");
        return "扣减库存";
    }
}

 

起两个服务

在浏览器输入localhot:/8081/order/add进行访问