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衔接上篇

🌹创建子模块

注意创建的子模块要在父模块的pom.xml中声明一下 

子模块spring-cloud-eureka-a

 pom文件如下

<?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>com.moming</groupId>
        <artifactId>spring-cloud-root</artifactId>
        <version>0.0.1-SNAPSHOT</version>
        <relativePath>../pom.xml</relativePath>
    </parent>

    <artifactId>spring-cloud-eureka-a</artifactId>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</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>

application.properties建立a应用

server.port = 9091
spring.application.name = a
eureka.client.service-url.defaultZone=http://ek1.cn:8001/eureka/,http://ek2.cn:8002/eureka/

创建测试接口controller/A

@RestController
public class A {
    @GetMapping("/a/test")
    public String test(@RequestParam(value = "name",required = false) String name){
        return "这是A应用返回的接口,参数为: "+name;
    }
}

启动项目，即可查看服务注册成功

 访问a应用

 子模块spring-cloud-eureka-b

创建同理

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>com.moming</groupId>
        <artifactId>spring-cloud-root</artifactId>
        <version>0.0.1-SNAPSHOT</version>
        <relativePath>../pom.xml</relativePath>
    </parent>

    <artifactId>spring-cloud-eureka-b</artifactId>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</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>

application.properties建立b应用

server.port = 9092
spring.application.name = b
#注册中心
eureka.client.service-url.defaultZone=http://ek1.cn:8001/eureka/,http://ek2.cn:8002/eureka/

启动类添加@EnableDiscoveryClient注解

@SpringBootApplication
//能从服务中心拉东西
@EnableDiscoveryClient
public class App {
    public static void main(String[] args) {
        SpringApplication.run(App.class, args);
    }
}

注册RestTemplate，代码如下

@Configuration
public class RestTemplateConfig {
    @Bean
    @LoadBalanced//负载均衡功能
    public RestTemplate restTemplate(){
        return new RestTemplate();
    }
}

创建测试接口controller/B.调用a服务对应接口

@RestController
public class B {

    @Autowired
    private RestTemplate restTemplate;
    @GetMapping("/b/test")
    public String test(@RequestParam(value = "nickName",required = false) String nickName){
        //希望访问到A的应用
        String ret = restTemplate.getForObject("http://a/a/test?name=张三", String.class);
        return ret+"的小名: "+nickName;
    }
}

同时运行A,B服务

访问b应用,调用a服务对应接口成功