为什么
使用这个三个版本,是有讲究的;spring boot 2.2.2
,spring cloud Hoxton.SR1
,spring cloud alibaba 2.1.0.RELEASE
父工程坐标:
<groupId>cn.cookily.springcloud</groupId>
<artifactId>cloud2020</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>pom</packaging>
cloud-consumer-order80坐标:
<groupId>cn.cookily.springcloud</groupId>
<artifactId>cloud-consumer-order80</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>
子模块可以精简写
groupId,version,因为子模块继承父模块,所以gv可以省略
packaging可以省略
packaging
不显示声明
默认为jar
类型
cloud-consumer-order80坐标可改为:
<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
RestTemplate 这边用到了RestTemplate,其实相当于httpclick调用
OrderController.class
@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");
}
}
}
ApplicationContextConfig.class
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=""/>
*/
OrderMain80.class
@SpringBootApplication
public class OrderMain80 {
public static void main(String[] args) {
SpringApplication.run(OrderMain80.class, args);
}
}
先插入
,注意我们order服务是get
请求,调用订单post
请求
查一下