SpringCloud -1- 项目搭建和技术选型

title: SpringCloud 项目构建 and 技术选型
author: mykk
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cover: false
toc: true
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summary: SpringCloud项目搭建
tags:

springcloud
搭建
categories:
分布式技术栈
abbrlink: 9df20094
reprintPolicy: cc_by
date: 2022-01-12 23:42:15
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1、版本

[图片上传失败...(image-3362aa-1648466768288)]

2、官网地址【Spring Cloud】

1、英文

https://cloud.spring.io/spring-cloud-static/Hoxton.SR1/reference/htmlsingle/

2、中文

https://www.bookstack.cn/read/spring-cloud-docs/docs-index.md

3、springboot

https://docs.spring.io/spring-boot/docs/2.2.2.RELEASE/reference/htmlsingle/

3、项目搭建-父工程构建

父工程坐标




    4.0.0
    com.kk
    springcloud2021to2022
    1.0-SNAPSHOT
    pom


    
    
        UTF-8
        1.8
        1.8
        4.12
        1.2.17
        1.16.18
        5.1.47
        1.1.16
        1.3.0
    

    
    
        
            
            
                org.springframework.boot
                spring-boot-dependencies
                2.2.2.RELEASE
                pom
                import
            
            
            
                org.springframework.cloud
                spring-cloud-dependencies
                Hoxton.SR1
                pom
                import
            
            
            
                com.alibaba.cloud
                spring-cloud-alibaba-dependencies
                2.1.0.RELEASE
                pom
                import
            

            
                mysql
                mysql-connector-java
                ${mysql.version}
            
            
                com.alibaba
                druid
                ${druid.version}
            
            
                org.mybatis.spring.boot
                mybatis-spring-boot-starter
                ${mybatis.spring.boot.version}
            
            
                junit
                junit
                ${junit.version}
            
            
                log4j
                log4j
                ${log4j.version}
            
            
                org.projectlombok
                lombok
                ${lombok.version}
                true
            
        
    

    
        
            
                org.springframework.boot
                spring-boot-maven-plugin
                
                    true
                    true

4、项目搭建-Rest微服务工程构建

1、坐标



    
        springcloud2021to2022
        com.kk
        1.0-SNAPSHOT
    
    4.0.0
    cloud-provider-payment8001
    
    
        
        
            org.springframework.boot
            spring-boot-starter-web
        

        
        
            org.springframework.boot
            spring-boot-starter-actuator
        

        
        
            org.mybatis.spring.boot
            mybatis-spring-boot-starter
        

        
        
            com.alibaba
            druid-spring-boot-starter
            1.1.10
        
        
        
            mysql
            mysql-connector-java
        

        
        
            org.springframework.boot
            spring-boot-starter-jdbc
        

        
        
            org.springframework.boot
            spring-boot-devtools
            runtime
            true
        

        
        
            org.projectlombok
            lombok
            true
        

        
        
            org.springframework.boot
            spring-boot-starter-test
            test

2、yml

server:
  port: 8001


spring:
  application:
    name: cloud-payment-service
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource
    driver-class-name: org.gjt.mm.mysql.Driver
    url: jdbc:mysql://localhost:3306/spring_cloud?useUnicode=true&characterEncoding=utf-8&useSSL=false
    username: root
    password: a1b2c3

mybatis:
  mapperLocations: classpath:mapper/*.xml
  type-aliases-package: com.kk.springclond.entities

3、主启动

@SpringBootApplication
public class PaymentMain8001 {
    public static void main(String[] args) {
        SpringApplication.run (PaymentMain8001.class, args);
    }
}

4、业务类

1、建表

CREATE TABLE `payment` (
`id`  bigint NOT NULL AUTO_INCREMENT ,
`serial`  varchar(255) NULL ,
PRIMARY KEY (`id`)
)

2、实体（entity）

（1）通用返回结果实体

@Data
@AllArgsConstructor
@NoArgsConstructor
public class CommonResult {
    private Integer code;
    private String message;
    private T data;

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

（2）Payment

@Data
@AllArgsConstructor
@NoArgsConstructor
public class Payment {
    private Long id;
    private String serial;
}

3、dao层

1、接口PaymentDao编写

package com.kk.springcloud.dao;
import com.kk.springcloud.entities.Payment;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Param;

@Mapper
public interface PaymentDao {
    public int create(Payment payment); //写

    public Payment getPaymentById(@Param("id") Long id);  //读取
}

2、mybatis的映射文件PaymentMapper.xml

（1）路径

src\main\resources\mapper\PaymentMapper.xml

（2）头文件





    
            insert into payment(serial) values(${serial});

4、service

1、接口

package com.kk.springcloud.service;
import com.kk.springcloud.entities.Payment;
import org.apache.ibatis.annotations.Param;

public interface PaymentService {
    public int create(Payment payment); //写

    public Payment getPaymentById(@Param("id") Long id);  //读取
}

2、实现类

package com.kk.springcloud.service.impl;
import com.kk.springcloud.dao.PaymentDao;
import com.kk.springcloud.entities.Payment;
import com.kk.springcloud.service.PaymentService;
import org.springframework.stereotype.Service;
import javax.annotation.Resource;

@Service
public class PaymentServiceImpl implements PaymentService {
    @Resource
    private PaymentDao paymentDao;

    public int create(Payment payment) {
        return paymentDao.create (payment);
    }

    public Payment getPaymentById(Long id) {
        return paymentDao.getPaymentById (id);
    }
}

5、controller

package com.kk.springcloud.controller;
import com.kk.springcloud.entities.CommonResult;
import com.kk.springcloud.entities.Payment;
import com.kk.springcloud.service.PaymentService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RestController;
import javax.annotation.Resource;

@RestController
@Slf4j
public class PaymentController {

    @Resource
    private PaymentService paymentService;

    @PostMapping(value = "/payment/create")
    public CommonResult create(Payment payment) {
        int result = paymentService.create (payment);
        log.info ("*****插入结果：" + result);
        if (result > 0) {  //成功
            return new CommonResult (200, "插入数据库成功", result);
        } else {
            return new CommonResult (444, "插入数据库失败", null);
        }
    }

    @GetMapping(value = "/payment/get/{id}")
    public CommonResult getPaymentById(@PathVariable("id") Long id) {
        Payment payment = paymentService.getPaymentById (id);
        log.info ("*****查询结果：" + payment);
        if (payment != null) {  //说明有数据，能查询成功
            return new CommonResult (200, "查询成功", payment);
        } else {
            return new CommonResult (444, "没有对应记录，查询ID：" + id, null);
        }
    }
}

5、测试

1、插入：使用post请求才能被插入，所以在url上无效，可以使用postman

http://localhost:8001/payment/create?serial=mykk02

[图片上传失败...(image-d36e2-1648466768288)]

2、查询：get请求，url，postman皆可

http://localhost:8001/payment/get/1

[图片上传失败...(image-bdd95d-1648466768288)]

5、热部署

1、子工程 pom

上面的依赖已经有加了，是这个

[图片上传失败...(image-2154f1-1648466768288)]

2、父工程 pom插件

上面的依赖已经有加了，是这个

[图片上传失败...(image-8cc33a-1648466768288)]

3、设置自动编译

[图片上传失败...(image-b4d78e-1648466768288)]

4、开启自动更新

1、打开设置面板

ctrl + shift + alt + /同时按住，点击第一个Registry...

[图片上传失败...(image-a7ef5f-1648466768288)]

2、两个打勾

[图片上传失败...(image-c930f9-1648466768288)]

[图片上传失败...(image-d1fded-1648466768288)]

5、重启 IDEA

6、项目搭建-Order订单微服务构建

1、坐标



    
        springcloud2021to2022
        com.kk
        1.0-SNAPSHOT
    
    4.0.0

    cloud-consumer-order80
    
        
        
            org.springframework.boot
            spring-boot-starter-web
        

        
        
            org.springframework.boot
            spring-boot-starter-actuator
        

        
        
            org.springframework.boot
            spring-boot-devtools
            runtime
            true
        

        
        
            org.projectlombok
            lombok
            true
        

        
        
            org.springframework.boot
            spring-boot-starter-test
            test

2、yml

server:
  port: 80

3、主启动

package com.kk.springcloud;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

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

4、业务类

1、创建entities

将cloud-provider-payment8001工程下的entities包下的两个实体类复制过来

2、RestTemplate

1、官网：

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

2、是什么

[图片上传失败...(image-45e0de-1648466768289)]

3、怎么用

[图片上传失败...(image-ac4d2e-1648466768289)]

3、配置类

ApplicationContextConfig

package com.kk.springcloud.config;
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();
    }
}

4、创建 controller

package com.kk.springcloud.controller;
import com.kk.springcloud.entities.CommonResult;
import com.kk.springcloud.entities.Payment;
import lombok.extern.slf4j.Slf4j;
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;
import javax.annotation.Resource;

@RestController
@Slf4j
public class OrderController {

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

    @Resource
    private RestTemplate restTemplate;

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

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

5、测试

1、先启动cloud-provider-payment8001

2、再启动cloud-consumer-order80

3、测试消费者接口

http://localhost/consumer/payment/get/1

注意点：被调用的生产者接口传参记得加注解

[图片上传失败...(image-34bf7d-1648466768289)]

7、项目重构

1、观察问题

1、系统中有重复部分，重构

[图片上传失败...(image-5b9331-1648466768289)]

2、新建公共模块【cloud-api-commons】

1、pom



    
        springcloud2021to2022
        com.kk
        1.0-SNAPSHOT
    
    4.0.0
    cloud-api-commons
    
        
        
            org.springframework.boot
            spring-boot-devtools
            runtime
            true
        

        
            org.projectlombok
            lombok
            true
        

        
        
            cn.hutool
            hutool-all
            5.1.0

2、实体

将订单模块和支付模块公共实体放到这里

[图片上传失败...(image-f43ce5-1648466768289)]

3、改造订单和支付

1、删除各自的原先有过的entities文件夹

2、各自分别引入公共模块

        
        
            com.kk
            cloud-api-commons
            ${project.version}

[图片上传失败...(image-4d59b9-1648466768289)]

7、项目模块结构图

[图片上传失败...(image-45b887-1648466768289)]

SpringCloud -1- 项目搭建和技术选型

1、版本

2、官网地址【Spring Cloud】

1、英文

2、中文

3、springboot

3、项目搭建-父工程构建

4、项目搭建-Rest微服务工程构建

1、坐标

2、yml

3、主启动

4、业务类

1、建表

2、实体（entity）

（1）通用返回结果实体

（2）Payment

3、dao层

1、接口PaymentDao编写

2、mybatis的映射文件PaymentMapper.xml

（1）路径

（2）头文件

4、service

1、接口

2、实现类

5、controller

5、测试

1、插入：使用post请求才能被插入，所以在url上无效，可以使用postman

2、查询：get请求，url，postman皆可

5、热部署

1、子工程 pom

2、父工程 pom插件

3、设置自动编译

4、开启自动更新

1、打开设置面板

2、两个打勾

5、重启 IDEA

6、项目搭建-Order订单微服务构建

1、坐标

2、yml

3、主启动

4、业务类

1、创建entities

2、RestTemplate

1、官网：

2、是什么

3、怎么用

3、配置类

4、创建 controller

5、测试

1、先启动cloud-provider-payment8001

2、再启动cloud-consumer-order80

3、测试消费者接口

注意点：被调用的生产者接口传参记得加注解

7、项目重构

1、观察问题

1、系统中有重复部分，重构

2、新建公共模块【cloud-api-commons】

1、pom

2、实体

3、改造订单和支付

1、删除各自的原先有过的entities文件夹

2、各自分别引入公共模块

7、项目模块结构图

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