微服务Spring Cloud实战 简易操作教程

简介 编写服务消费者

服务提供者链接：https://blog.csdn.net/weixin_43439494/article/details/83213744

1.创建一个Maven项目，ArtifactId是microservice-simple-consumer-movie。

大致目录如下:

2.和服务提供者，电影微服务也需要引入String Boot及Sprig Cloud的依赖管理。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的依赖 -->
    <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的依赖 -->
    <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>

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

3.创建用户实体类，该类是一个POJO。

POJO指的是不包含java业务逻辑的只单纯用来存储数据的java类。

	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.创建启动类ConsumerMovieApplication，代码如下。

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

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

5.创建Controller，在其中使用RestTemplate请求用户微服务的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.配置编写文件 application.yml:

server:
    port: 8010

7.访问网址 http：//127.0.0.1：8010/user/1，结果如下：

本文大部分内容转载自周立的《Spring Cloud与Docker微服务架构实战》