簡介 編寫服務消費者

服務提供者連結：https://blog.csdn.net/weixin_43439494/article/details/83213744

1.建立一個Maven專案，ArtifactId是microservice-simple-consumer-movie。

大致目錄如下:

2.和服務提供者，電影微服務也需要引入String Boot及Sprig Cloud的依賴管理。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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.aster</groupId>
    <artifactId>microservice-simple-consumer-movice<
 
/artifactId>
    <version>1.0-SNAPSHOT</version>

    <packaging>jar</packaging>

    <!-- 引入spring boot的依賴 -->
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <
 
version>2.0.4.RELEASE</version>
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
            <version>2.0.4.RELEASE</version>
        </dependency>
    </dependencies>

    <!-- 引入spring cloud的依賴 -->
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Edgwware.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <!-- 新增spring-boot的maven外掛 -->
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
    
</project>

3.建立使用者實體類，該類是一個POJO。

POJO指的是不包含java業務邏輯的只單純用來儲存資料的java類。

	public class User {
    private Long id;
    private String username;
    private String name;
    private Integer age;
    private BigDecimal balance;

	//getters and setters
    public Long getId() { return id; }
    public void setId(Long id) { this.id = id; }
    public String getUsername() { return username; }
    public void setUsername(String username) { this.username = username; }
    public String getName() { return name; }
    public void setName(String name) { this.name = name; }
    public Integer getAge() { return age; }
    public void setAge(Integer age) { this.age = age; }
    public BigDecimal getBalance() { return balance; }
    public void setBalance(BigDecimal balance) { this.balance = balance; }
}

4.建立啟動類ConsumerMovieApplication，程式碼如下。

@SpringBootApplication
public class ConsumerMovieApplication {
    @Bean
    public RestTemplate restTemplate() { return new RestTemplate(); }

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

5.建立Controller，在其中使用RestTemplate請求使用者微服務的API。

@RestController
public class MovieController {
    @Autowired
    private RestTemplate restTemplate;

    @GetMapping("/user/{id}")
    public User findById(@PathVariable Long id){
        return this.restTemplate.getForObject("http://localhost:8000/" + id, User.class);
    }
}

6.配置編寫檔案 application.yml:

server:
    port: 8010

7.訪問網址 http：//127.0.0.1：8010/user/1，結果如下：

本文大部分內容轉載自周立的《Spring Cloud與Docker微服務架構實戰》