springCloud學習day1

1,建立一個maven項目

2，src文件無用，可刪除

3，pom.xml的依賴（包括了一些後期配置）

<?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">

    <!--子工程的引用-->
    <modules>
        <module>eu_server</module>
        <module>eu_client</module>
    </modules>

    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.2.1.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.example</groupId>
    <artifactId>mycloud</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>mycloud</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
        </dependency>
        <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>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>cn.hutool</groupId>
            <artifactId>hutool-all</artifactId>
            <version>5.0.4</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-context</artifactId>
            <version>2.2.1.RELEASE</version>
        </dependency>

        <!--日誌包@Slf4j註解形式-->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.4</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>1.7.25</version>
        </dependency>
        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-classic</artifactId>
            <version>1.2.3</version>
        </dependency>
        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter-api</artifactId>
            <version>5.2.0</version>
            <scope>test</scope>
        </dependency>

        <!--Spring Cloud 服務註冊組件-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
            <version>2.2.1.RELEASE</version>
        </dependency>
    </dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

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

</project>

4，建立module（服務端和客戶端方式一樣）

 

1和2可以修改 

 

 

 5，對於server和client的pom進行修改，對project的pom修改

 

 

 6，生產者與消費者的application的配置

#生產者
server.port=8801
eureka.client.register-with-eureka=false
eureka.client.fetch-registry=false
spring.application.name=eu_server #別名
eureka.client.serviceUrl.defaultZone=http://localhost:${server.port}/eureka/

#消費者
server.port=8761
# 別名
spring.application.name=eu_client
# 服務註冊地址
eureka.client.serviceUrl.defaultZone=http://localhost:8801/eureka/

 7，寫註解

@EnableEurekaServer--生產者的啓動類

@EnableEurekaClient--消費者啓動類

8，相關代碼片段

消費者啓動類
@SpringBootApplication
@EnableEurekaClient
public class EuClientApplication {

    @Bean //相當於xml中的bean標籤，主要是用於調用當前方法獲取指定對象
    public RestTemplate restTemplate(){
        return new RestTemplate();
    }
    public static void main(String[] args) {
        SpringApplication.run(EuClientApplication.class, args);
    }
}

消費者控制類
@RestController
public class OrderController {

    @Autowired
    private  RestTemplate restTemplate;//spring 提供的一個用於訪問rest接口的模板對象
    private String server_Url="http://localhost:8801/user/";

    @GetMapping("/order/{id}")
    public User showOrder(@PathVariable("id") String id){
        //通過訪問rest,獲取json對象，轉換爲user對象
        User user = restTemplate.getForObject(server_Url+id, User.class);
        return user;
    }
}

生產者控制類
@RestController
public class UserController {
    @GetMapping("/user/{id}")
    public User showUser(@PathVariable("id") String id){
        return new User(id,"李四","小牛",new Date());
    }
}

生產者啓動類
@EnableEurekaServer
public class EuServerApplication {

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

}

9，頁面訪問效果

http://localhost:8801/

http://localhost:8761/order/3

 

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