问题背景

从零开始学springcloud微服务项目
注意事项：

约定 > 配置 > 编码
IDEA版本2021.1
这个项目，我分了很多篇章，每篇文章一个操作步骤，目的是显得更简单明了
controller调service，service调dao
项目源码以及sentinel安装包

项目搭建

1 右键新增module

2 点击next

3 输入项目名，cloud-consumer-order80，点击finish

4 替换pom文件

<?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>springcloud2022</artifactId>
        <groupId>com.yg</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-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>

5 在resources下新增application.yml文件

server:
  port: 80

6 新增启动类

package com.yg.springcloud;

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

/**
 * @Author suolong
 * @Date 2022/6/15 15:10
 * @Version 2.0
 */

@SpringBootApplication
public class MainApp80 {

    public static void main(String[] args) {
        SpringApplication.run(MainApp80.class);
    }
    
}

7 新增RestTemplate配置类，使用@Bean注入到spring容器，才能使用自动注入的方式

package com.yg.springcloud.config;

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

/**
 * @Author suolong
 * @Date 2022/6/15 20:53
 * @Version 2.0
 */
@Configuration
public class ApplicationContextConfig {

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

}

8 添加entities

package com.yg.springcloud.entities;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

import java.io.Serializable;

/**
 * @Author suolong
 * @Date 2022/6/14 21:13
 * @Version 2.0
 */
@Data
@NoArgsConstructor
@AllArgsConstructor
public class Payment implements Serializable {

    private Long id;
    private String serial;

}

package com.yg.springcloud.entities;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

/**
 * @Author suolong
 * @Date 2022/6/14 21:15
 * @Version 2.0
 */
@Data
@AllArgsConstructor
@NoArgsConstructor
public class CommonResult<T> {

    private Integer code;
    private String message;
    private T data;

    public CommonResult(Integer code, String message) {
        this(code, message, null);
    }
}

9 添加controller

package com.yg.springcloud.controller;

import com.yg.springcloud.entities.CommonResult;
import com.yg.springcloud.entities.Payment;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

/**
 * @Author suolong
 * @Date 2022/6/15 20:54
 * @Version 2.0
 */

@RestController
public class OrderController {


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

    @Autowired
    private RestTemplate restTemplate;

    @GetMapping("/consumer/payment/create") //客户端用浏览器是get请求，但是底层实质发送post调用服务端8001
    public CommonResult create(Payment payment) {
        return restTemplate.postForObject(PaymentSrv_URL + "/payment/create", payment, CommonResult.class);
    }


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

}