title: SpringCloud 项目构建 and 技术选型
author: mykk
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cover: false
toc: true
mathjax: false
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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img:
password:
1、版本
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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
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2、查询:get请求,url,postman皆可
http://localhost:8001/payment/get/1
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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-830172-1648466098520)]
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-d32281-1648466098520)]
3、设置自动编译
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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...
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2、两个打勾
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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
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3、怎么用
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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
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7、项目重构
1、观察问题
1、系统中有重复部分,重构
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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-ea4c3d-1648466098520)]
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}
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7、项目模块结构图
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