SpringCloud 2020 - 微服务架构编码构建（笔记）
微服务架构编码构建
-
- 1、新建maven工程
- 2、配置环境
- 3、修改工程文件
- 4、构建微服务
-
- 4.1、cloud-provider-payment8001微服务提供者支付Module模块
- 4.2、Devtools热部署
- 4.3、cloud-consumer-order80微服务消费者订单Module模块
- 5、工程重构
- 6、下一篇：SpringCloud 2020-Eureka服务注册与发现（笔记）
- 视频地址：
1、新建maven工程
2、配置环境
3、修改工程文件
删除src目录
pom.xml
<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">
<modelVersion>4.0.0modelVersion>
<groupId>com.liukai.springcloudgroupId>
<artifactId>cloud2020artifactId>
<version>1.0-SNAPSHOTversion>
<packaging>pompackaging>
<properties>
<project.build.sourceEncoding>UTF-8project.build.sourceEncoding>
<maven.compiler.source>1.8maven.compiler.source>
<maven.compiler.target>1.8maven.compiler.target>
<junit.version>4.12junit.version>
<log4j.version>1.2.17log4j.version>
<lombok.version>1.16.18lombok.version>
<mysql.version>5.1.47mysql.version>
<druid.version>1.1.16druid.version>
<mybatis.spring.boot.version>1.3.0mybatis.spring.boot.version>
properties>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.apache.maven.pluginsgroupId>
<artifactId>maven-project-info-reports-pluginartifactId>
<version>3.0.0version>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-dependenciesartifactId>
<version>2.2.2.RELEASEversion>
<type>pomtype>
<scope>importscope>
dependency>
<dependency>
<groupId>org.springframework.cloudgroupId>
<artifactId>spring-cloud-dependenciesartifactId>
<version>Hoxton.SR1version>
<type>pomtype>
<scope>importscope>
dependency>
<dependency>
<groupId>com.alibaba.cloudgroupId>
<artifactId>spring-cloud-alibaba-dependenciesartifactId>
<version>2.1.0.RELEASEversion>
<type>pomtype>
<scope>importscope>
dependency>
<dependency>
<groupId>mysqlgroupId>
<artifactId>mysql-connector-javaartifactId>
<version>${mysql.version}version>
<scope>runtimescope>
dependency>
<dependency>
<groupId>com.alibabagroupId>
<artifactId>druidartifactId>
<version>${druid.version}version>
dependency>
<dependency>
<groupId>org.mybatis.spring.bootgroupId>
<artifactId>mybatis-spring-boot-starterartifactId>
<version>${mybatis.spring.boot.version}version>
dependency>
<dependency>
<groupId>junitgroupId>
<artifactId>junitartifactId>
<version>${junit.version}version>
dependency>
<dependency>
<groupId>log4jgroupId>
<artifactId>log4jartifactId>
<version>${log4j.version}version>
dependency>
dependencies>
dependencyManagement>
<build>
<plugins>
<plugin>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-maven-pluginartifactId>
<version>2.2.6.RELEASEversion>
<configuration>
<fork>truefork>
<addResources>trueaddResources>
configuration>
plugin>
plugins>
build>
project>
Maven中的dependencyManagement和dependencies:
dependencyManagement中声明依赖，并不实现引入，因此子项目中需要显示的声明需要用的依赖。
如果不在子项目中声明依赖，是不会从父工程中继承下来的，只有在子工程中写了该依赖，并且没有指定具体版本，才会从父项目中继承该项，并且version和scpoe都读取自父pom。
如果子项目中指定了版本号，那么会使用子项目中指定的jar版本。
Maven如何跳过单元测试：
4、构建微服务
构建微服务
- 建module
- 改pom
- 写yml
- 主启动
- 业务类
4.1、cloud-provider-payment8001微服务提供者支付Module模块
父工程的pom文件改变了，说明cloud-provider-payment8001是子模块
- cloud-provider-payment8001的pom.xml
<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>cloud2020artifactId>
<groupId>com.liukai.springcloudgroupId>
<version>1.0-SNAPSHOTversion>
parent>
<modelVersion>4.0.0modelVersion>
<artifactId>cloud-provider-payment8001artifactId>
<properties>
<maven.compiler.source>8maven.compiler.source>
<maven.compiler.target>8maven.compiler.target>
properties>
<dependencies>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-webartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-actuatorartifactId>
dependency>
<dependency>
<groupId>org.mybatis.spring.bootgroupId>
<artifactId>mybatis-spring-boot-starterartifactId>
dependency>
<dependency>
<groupId>com.alibabagroupId>
<artifactId>druid-spring-boot-starterartifactId>
<version>1.1.10version>
dependency>
<dependency>
<groupId>mysqlgroupId>
<artifactId>mysql-connector-javaartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-jdbcartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-devtoolsartifactId>
<scope>runtimescope>
<optional>trueoptional>
dependency>
<dependency>
<groupId>org.projectlombokgroupId>
<artifactId>lombokartifactId>
<optional>trueoptional>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-testartifactId>
<scope>testscope>
dependency>
dependencies>
project>
- cloud-provider-payment8001的application.yml
server:
port: 8001
spring:
application:
name: cloud-payment-service
datasource:
type: com.alibaba.druid.pool.DruidDataSource # 当前数据源操作类型
driver-class-name: org.gjt.mm.mysql.Driver # mysql驱动包
url: jdbc:mysql://localhost:3306/cloud2020?useUnicode=true&characterEncoding=utf-8&useSSL=false
username: root
password: 123456
mybatis:
mapperLocations: classpath:mapper/*.xml
type-aliases-package: com.liukai.springcloud.entities # 所有Entity别名类所在包
- 主启动类
package com.liukai.springcloud;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
/**
* @author liukai
* @version 1.0.0
* @ClassName PaymentMain8001.java
* @Description TODO
* @createTime 2021年03月19日 16:47:00
*/
@SpringBootApplication
public class PaymentMain8001 {
public static void main(String[] args) {
SpringApplication.run(PaymentMain8001.class);
}
}
- 建表
CREATE TABLE payment (
id BIGINT(20) NOT NULL AUTO_INCREMENT COMMENT ID,
'serial' VARCHAR(200) DEFAULT '',
PRIMARY KEY(id)
) ENGINE=INNODB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8
- Payment类
package com.liukai.springcloud.entities;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import lombok.ToString;
import java.io.Serializable;
/**
* @author liukai
* @version 1.0.0
* @ClassName Payment.java
* @Description TODO
* @createTime 2021年03月19日 16:55:00
*/
@Data
@AllArgsConstructor
@NoArgsConstructor
@ToString
public class Payment implements Serializable {
private Long id;
private String serial;
}
- 通用返回实体类CommonResult
package com.liukai.springcloud.entities;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
/**
* @author liukai
* @version 1.0.0
* @ClassName CommonResult.java
* @Description TODO
* @createTime 2021年03月19日 16:55:00
*/
@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);
}
}
- PaymentDao类
package com.liukai.springcloud.dao;
import com.liukai.springcoud.entities.Payment;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Param;
/**
* @author liukai
* @version 1.0.0
* @ClassName PaymentDao.java
* @Description TODO
* @createTime 2021年03月19日 16:51:00
*/
@Mapper
public interface PaymentDao
{
public int create(Payment payment);
public Payment getPaymentById(@Param("id") Long id);
}
- PaymentMapper.xml
<mapper namespace="com.liukai.springcloud.dao.PaymentDao">
<insert id="create" parameterType="Payment" useGeneratedKeys="true" keyProperty="id">
insert into payment(serial) values(#{serial});
insert>
<resultMap id="BaseResultMap" type="com.liukai.springcloud.entities.Payment">
<id column="id" property="id" jdbcType="BIGINT"/>
<id column="serial" property="serial" jdbcType="VARCHAR"/>
resultMap>
<select id="getPaymentById" parameterType="Long" resultMap="BaseResultMap">
select * from payment where id=#{id};
select>
mapper>
- PaymentService
package com.liukai.springcloud.service;
import com.liukai.springcloud.entities.Payment;
import org.apache.ibatis.annotations.Param;
/**
* @author liukai
* @version 1.0.0
* @ClassName PaymentService.java
* @Description TODO
* @createTime 2021年03月19日 16:52:00
*/
public interface PaymentService {
public int create(Payment payment);
public Payment getPaymentById(@Param("id") Long id);
}
- PaymentServiceImpl
package com.liukai.springcloud.service.impl;
import com.liukai.springcloud.dao.PaymentDao;
import com.liukai.springcloud.entities.Payment;
import com.liukai.springcloud.service.PaymentService;
import org.springframework.stereotype.Service;
import javax.annotation.Resource;
/**
* @author liukai
* @version 1.0.0
* @ClassName PaymentServiceImpl.java
* @Description TODO
* @createTime 2021年03月19日 16:52:00
*/
@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);
}
}
- PaymentController
package com.liukai.springcloud.controller;
import com.liukai.springcloud.entities.CommonResult;
import com.liukai.springcloud.entities.Payment;
import com.liukai.springcloud.service.PaymentService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.*;
import javax.annotation.Resource;
import java.util.List;
import java.util.concurrent.TimeUnit;
/**
* @author liukai
* @version 1.0.0
* @ClassName PaymentController.java
* @Description TODO
* @createTime 2021年03月19日 16:55:00
*/
@RestController
@Slf4j
public class PaymentController {
@Resource
private PaymentService paymentService;
@Value("${server.port}")
private String serverPort;
@PostMapping(value = "/payment/create")
public CommonResult create(Payment payment) {
int result = paymentService.create(payment);
log.info("*****插入结果：" + result);
if (result > 0) {
return new CommonResult(200, "插入数据库成功,serverPort: " + serverPort, result);
} else {
return new CommonResult(444, "插入数据库失败", null);
}
}
@GetMapping(value = "/payment/get/{id}")
public CommonResult<Payment> getPaymentById(@PathVariable("id") Long id) {
Payment payment = paymentService.getPaymentById(id);
if (payment != null) {
return new CommonResult(200, "查询成功,serverPort: " + serverPort, payment);
} else {
return new CommonResult(444, "没有对应记录,查询ID: " + id, null);
}
}
}
- 测试
4.2、Devtools热部署
添加依赖
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-devtoolsartifactId>
<scope>runtimescope>
<optional>trueoptional>
dependency>
Ctrl+Alt+Shift+/
重启idea
4.3、cloud-consumer-order80微服务消费者订单Module模块
- 新建步骤和3.1一样
- pom.xml
<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>cloud2020artifactId>
<groupId>com.liukai.springcloudgroupId>
<version>1.0-SNAPSHOTversion>
parent>
<modelVersion>4.0.0modelVersion>
<artifactId>cloud-consumer-order80artifactId>
<dependencies>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-webartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-actuatorartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-devtoolsartifactId>
<scope>runtimescope>
<optional>trueoptional>
dependency>
<dependency>
<groupId>org.projectlombokgroupId>
<artifactId>lombokartifactId>
<optional>trueoptional>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-testartifactId>
<scope>testscope>
dependency>
dependencies>
project>
- application.yml
server:
port: 80
- 主启动类OrderMain80
package com.liukai.springcloud;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
/**
* @author liukai
* @version 1.0.0
* @ClassName OrderMain80.java
* @Description TODO
* @createTime 2021年03月19日 18:27:00
*/
@SpringBootApplication
public class OrderMain80 {
public static void main(String[] args) {
SpringApplication.run(OrderMain80.class);
}
}
- 添加实体类，赋值cloud-provider-payment中的entities包
- OrderController
package com.liukai.springcloud.controller;
import com.liukai.springcloud.entities.CommonResult;
import com.liukai.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;
/**
* @author liukai
* @version 1.0.0
* @ClassName OrderController.java
* @Description TODO
* @createTime 2021年03月19日 21:48:00
*/
@RestController
@Slf4j
public class OrderController {
// 8001端口地址
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> getPaymentById(@PathVariable("id") Long id){
return restTemplate.getForObject(PAYMENT_URL + "/payment/get/" + id,CommonResult.class);
}
}
RestTemplate提供了多种便捷访问远程Http服务的方法，是一种给简单便捷的访问restful服务类模板，是Spring提供的用于访问Rest服务的客户端模板工具集。（此处用于80端口访问8001端口）
官网地址：
https://docs.spring.io/spring-framework/docs/5.2.2.RELEASE/javadoc-api/org/springframework/web/client/RestTemplate.html
使用：（url，requestMap，ResponseBean.class）这三个参数分别代表REST请求地址，请求参数，Http响应转换成被转换的对象类型。
- ApplicationContextConfig 中配置注入RestTemplate
package com.liukai.springcloud.config;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.client.RestTemplate;
/**
* @author liukai
* @version 1.0.0
* @ClassName ApplicationContextConfig.java
* @Description TODO
* @createTime 2021年03月19日 22:01:00
*/
@Configuration
public class ApplicationContextConfig {
// 注入RestTemplate
@Bean
public RestTemplate getRestTemplate(){
return new RestTemplate();
}
}
- 测试，启动8001，80端口
当启动多个服务时，idea右下角会弹出一个对话框，需要点击打开Services，才会在一个界面显示所有服务。如果不显示，请查看idea启动多个服务不显示Services或者RunDashboard窗口
测试查询：成功测试插入：返回的是成功，但是数据库却没有
需要在PaymentController中的create方法中添加一个@RequestBody注解
再次测试，插入成功
5、工程重构
1、新建Module cloud-api-commons
2、pom.xml
<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>cloud2020artifactId>
<groupId>com.liukai.springcloudgroupId>
<version>1.0-SNAPSHOTversion>
parent>
<modelVersion>4.0.0modelVersion>
<artifactId>cloud-api-commonsartifactId>
<dependencies>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-devtoolsartifactId>
<scope>runtimescope>
<optional>trueoptional>
dependency>
<dependency>
<groupId>org.projectlombokgroupId>
<artifactId>lombokartifactId>
<optional>trueoptional>
dependency>
<dependency>
<groupId>cn.hutoolgroupId>
<artifactId>hutool-allartifactId>
<version>5.1.0version>
dependency>
dependencies>
project>
3、将cloud-provider-payment8001中的包entities复制到cloud-api-commons中，删除cloud-consumer-order80和cloud-provider-payment8001中的entities包
4、cloud-api-commons打包提交到仓库，代码供其他模块使用
5、需要引用cloud-api-commons的模块需要修改pom.xml，添加依赖，比如cloud-consumer-order80和cloud-provider-payment8001的pom.xml中添加以下代码
<dependency>
<groupId>com.liukai.springcloudgroupId>
<artifactId>cloud-api-commonsartifactId>
<version>${project.version}version>
dependency>
6、测试：成功
6、下一篇：SpringCloud 2020-Eureka服务注册与发现（笔记）
下一篇：SpringCloud 2020-Eureka服务注册与发现（笔记）
视频地址：
此笔记的视频地址：尚硅谷SprngCloud（H版&alibaba框架开发教程（大牛讲授SpringCloud））