《SpringCloud专题04》-微服务架构编码构建-服务消费者

1.建cloud-consumer-order80

2.改POM

<?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>springcloud2020</artifactId>
        <groupId>com.itxiongmao.springcloud</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

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

    <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>
        </dependency>
        
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>


        <dependency>
            <groupId>com.itxiongmao.springcloud</groupId>
            <artifactId>cloud-api-commons</artifactId>
            <version>1.0-SNAPSHOT</version>
            <scope>compile</scope>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>

    </dependencies>


</project>

3.写YML

server:
  port: 80

spring:
  application:
    name: cloud-comsumer-order

4.主启动

package com.itxiongmao;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

/**
 * @BelongsProject: springcloud2020
 * @BelongsPackage: com.itxiongmao
 * @CreateTime: 2020-07-09 11:52
 * @Description: TODO
 */
@SpringBootApplication
public class OrderMain80 {
    public static void main(String[] args) {
        SpringApplication.run(OrderMain80.class,args);
    }
}

5.Resttemplate

Resttemplate是Spring用于同步client端的核心类，简化了与http服务的通信，并满足RestFul原则，程序代码可以给它提供URL，并提取结果。默认情况下，RestTemplate默认依赖jdk的HTTP连接工具。当然你也可以 通过setRequestFactory属性切换到不同的HTTP源，比如Apache HttpComponents、Netty和OkHttp。

官网地址：​​https://docs.spring.io/spring-framework/docs/5.2.2.RELEASE/javadoc-api/org/springframework/web/client/RestTemplate.html​​

config配置类

package com.itxiongmao.config;

/**
 * @BelongsProject: springcloud2020
 * @BelongsPackage: com.itxiongmao.config
 * @CreateTime: 2020-07-09 12:27
 * @Description: TODO
 */
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.client.RestTemplate;

@Configuration
public class ApplicationContextConfig {

    @Bean
    public RestTemplate getRestTemplate() {
        return new RestTemplate();
    }
}

6.controller

package com.itxiongmao.controller;

/**
 * @BelongsProject: springcloud2020
 * @BelongsPackage: com.itxiongmao.controller
 * @CreateTime: 2020-07-09 12:31
 * @Description: TODO
 */
import com.itxiongmao.springcloud.entities.CommonResult;
import com.itxiongmao.springcloud.entities.Payment;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;
import java.net.URI;
import java.util.List;

@RestController
@RequestMapping("consumer")
public class OrderController {

    public static final String PAYENT_URL = "http://localhost:8001";

    @Resource
    private RestTemplate restTemplate;

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

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

7.测试

​​http://localhost/consumer/payment/selectOne/31​​​
​​​ http://localhost/consumer/payment/create?serial=1234567​​

不要忘记@RequestBody注解