SpringCloud2020 学习笔记（五）cloud-consumer-order80 消费者订单模块

<groupId>cn.cookily.springcloud</groupId>
<artifactId>cloud2020</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>pom</packaging>

<groupId>cn.cookily.springcloud</groupId>
<artifactId>cloud-consumer-order80</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>

<artifactId>cloud-consumer-order80</artifactId>

<?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>cloud2020</artifactId>
        <groupId>cn.cookily.springcloud</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>cloud-consumer-order80</artifactId>

    <name>cloud-consumer-order80</name>
    
    <dependencies>

        <dependency>
            <!-- 引入自己定义的api通用包，可以使用Payment支付Entity -->
            <groupId>cn.cookily.springcloud</groupId>
            <artifactId>cloud-api-commons</artifactId>
            <version>${project.version}</version>
        </dependency>
        <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>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

</project>

server:
  port: 80

spring:
    application:
        name: cloud-order-service

@RestController
@Slf4j
public class OrderController {
    public static final String PAYMENT_URL = "http://localhost:8001";


    @Resource
    private RestTemplate restTemplate;


    @GetMapping("/consumer/payment/create")
    public CommonResult<Payment> create(Payment payment) {
        return restTemplate.postForObject(PAYMENT_URL + "/payment/create", payment, CommonResult.class);
    }

    @GetMapping("/consumer/payment/get/{id}")
    public CommonResult<Payment> getPayment(@PathVariable("id") Long id) {
        return restTemplate.getForObject(PAYMENT_URL + "/payment/get/" + id, CommonResult.class);
    }

    @GetMapping("/consumer/payment/getForEntity/{id}")
    public CommonResult<Payment> getPayment2(@PathVariable("id") Long id) {
        ResponseEntity<CommonResult> entity = restTemplate.getForEntity(PAYMENT_URL + "/payment/get/" + id, CommonResult.class);

        if (entity.getStatusCode().is2xxSuccessful()) {
            return entity.getBody();
        } else {
            return new CommonResult<>(444, "操作失败");
        }
    }

}

package cn.cookily.springcloud.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.client.RestTemplate;


/**
 * @author cookily
 * @date 2020-10-14
 */
// @Configuration标注在类上，相当于把该类作为spring的xml配置文件中的<beans>，作用为：配置spring容器(应用上下文)
@Configuration
public class ApplicationContextConfig {
    // @Bean标注在方法上(返回某个实例的方法)，等价于spring的xml配置文件中的<bean>，作用为：注册bean对象
    // 也可以这么理解，@Bean相当以前的xml里applicationContext.xml的 <bean id="restTemplate" class="xxx.RestTemplate.class">
    // 反正就是 [@Configuration]声明为配置类，交给spring管理，也就是配置spring容器(应用上下文) 然后 @Bean 注解的方法都会被动态代理，因此调用该方法返回的都是同一个实例
    // 总结：注入直接用，单例
    @Bean
    public RestTemplate getRestTemplate() {
        return new RestTemplate();
    }
}

/**
 * 和xml比较
 *
 * @Configuation等价于<Beans></Beans>
 * @Bean等价于<Bean></Bean>
 * @ComponentScan等价于<context:component-scan base-package=""/>
 */

@SpringBootApplication
public class OrderMain80 {
    public static void main(String[] args) {
        SpringApplication.run(OrderMain80.class, args);
    }
}