SpringCloud2020学习笔记03——微服务架构编码构建
目录
- 一、IDEA新建project工作控件
- 1、微服务cloud整体聚合父工程Project
- 父工程步骤：
- 2、父工程POM
- 3、Maven工程落地细节复习
- ① Maven中的dependencyManagement和dependencies
- ② Maven中跳过单元测试
- 二、Rest微服务工程构建
- 1、构建步骤
- ① cloud-provider-payment8001微服务提供者支付Module模块
- ② 热部署Devtools
- ③ cloud-consumer-order80微服务消费者订单Module模块
- ④ 工程重构
一、IDEA新建project工作控件
1、微服务cloud整体聚合父工程Project
父工程步骤：
① New Project
② 字符编码
③ 注解激活生效
④ java编译版本选8
2、父工程POM
<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.radish.springcloudgroupId>
<artifactId>springcloudartifactId>
<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>4.12log4j.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.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>${mysql.version}version>
dependency>
<dependency>
<groupId>com.alibabagroupId>
<artifactId>druidartifactId>
<version>${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>${log4j.version}version>
dependency>
dependencies>
dependencyManagement>
project>
3、Maven工程落地细节复习
① Maven中的dependencyManagement和dependencies
Maven使用dependencyManagement元素提供了一种管理依赖版本号的方式。
通常会在一个组织或者项目的最顶层的父POM中看到dependencyManagement元素。
在父POM指定了版本号，而在子POM中可以不指定版本号，直接引用父POM的版本号。
父POM：
<dependencyManagement>
<dependencies>
<dependency>
<groupId>mysqlgroupId>
<artifactId>mysql-connector-javaartifactId>
<version>${mysql.version}version>
dependency>
dependencies>
dependencyManagement>
子POM：
<dependencies>
<dependency>
<groupId>mysqlgroupId>
<artifactId>mysql-connector-javaartifactId>
dependency>
dependencies>
② Maven中跳过单元测试
二、Rest微服务工程构建
1、构建步骤
① cloud-provider-payment8001微服务提供者支付Module模块
- 建module
- 改POM
<dependencies>
<dependency>
<groupId>org.springframework.cloudgroupId>
<artifactId>spring-cloud-starter-zipkinartifactId>
dependency>
<dependency>
<groupId>com.eiletxie.springcloudgroupId>
<artifactId>cloud-api-commonsartifactId>
<version>${project.version}version>
dependency>
<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>org.springframework.cloudgroupId>
<artifactId>spring-cloud-starter-netflix-eureka-clientartifactId>
dependency>
<dependency>
<groupId>com.alibabagroupId>
<artifactId>druid-spring-boot-starterartifactId>
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>
- 写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/db2020?useUnicode=true&characterEncoding=utf-8&useSSL=false
username: root
password: 123456
mybatis:
mapper-locations: classpath:mapper/*.xml
type-aliases-package: com.radish.springcloud.entities #所有Entity别名类所在包
- 主启动
- 业务类
（1）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
（2）entities
主实体Payment
@Data
@AllArgsConstructor
@NoArgsConstructor
public class Payment implements Serializable {
private Long id;
private String serial;
}
Json封装体CommonResult
@Data
@AllArgsConstructor
@NoArgsConstructor
public class CommonResult<T> {
//404 not_found
private Integer code;
private String message;
private T data;
public CommonResult(Integer code, String message) {
this(code, message, null);
}
}
注意：还需要安装Lombok插件，lombok才可以生效
（3）dao
PaymentDao.java
@Mapper
public interface PaymentDao {
public int create(Payment payment);
public Payment getPaymentById(@Param("id") Long id);
public int delete(@Param("id") Long id);
public int update(Payment payment);
}
PaymentMapper.xml
<mapper namespace="com.radish.springcloud.dao.PaymentDao">
<insert id="create" parameterType="Payment" useGeneratedKeys="true" keyProperty="id">
insert into payment(serial) values(#{serial});
insert>
<resultMap id="BaseResultMap" type="com.radish.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>
（4）service
PaymentService.java
public interface PaymentService {
public int create(Payment payment);
public Payment getPaymentById(@Param("id") Long id);
public int delete(@Param("id") Long id);
public int update(Payment payment);
}
PaymentServiceImpl.java
@Service
public class PaymentServiceImpl implements PaymentService {
@Resource
public PaymentDao paymentDao;
@Override
public int create(Payment payment) {
return paymentDao.create(payment);
}
@Override
public Payment getPaymentById(Long id) {
return paymentDao.getPaymentById(id);
}
@Override
public int delete(Long id) {
return paymentDao.delete(id);
}
@Override
public int update(Payment payment) {
return paymentDao.update(payment);
}
}
（5）controller
@RestController
@Slf4j
public class PaymentController {
@Resource
private PaymentService paymentService;
@PostMapping(value = "/payment/create")
public CommonResult create(@RequestBody 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", 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("*****插入结果："+payment);
if(payment != null) {
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);
}
}
}
② 热部署Devtools
1.Adding devtools to your project
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-devtoolsartifactId>
<scope>runtimescope>
<optional>trueoptional>
dependency>
2.Adding plugin to your pom.xml
<build>
<plugins>
<plugin>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-maven-pluginartifactId>
<configuration>
<fork>truefork>
<addResources>trueaddResources>
configuration>
plugin>
plugins>
build>
3.Enabling automatic build 四个打钩
4.Update the value of
5.重启IDEA
③ cloud-consumer-order80微服务消费者订单Module模块
同上创建cloud-consumer-order80模块
改POM
<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>
写YML
server:
port: 80
主启动
@SpringBootApplication
public class OrderMain80 {
public static void main(String[] args) {
SpringApplication.run(OrderMain80.class,args);
}
}
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
RestTemplate提供了多种便捷访问远程Http服务的方法，是一种简单便捷的访问restful服务模板类，是spring提供的用于访问Rest服务的客户端模板工具集
3.config配置类
ApplicationContextConfig.java
@Configuration
public class ApplicationContextConfig {
@Bean
public RestTemplate getRestTemplate() {
return new RestTemplate();
}
}
4.创建controller
OrderController.java
@RestController
@Slf4j
public class OrderController {
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> getPayment(@PathVariable("id") Long id) {
return restTemplate.getForObject(PAYMENT_URL+"/payment/get/" + id, CommonResult.class);
}
}
测试
④ 工程重构
1.新建cloud-api-commons
2.pom
<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>
3.entities
复制之前的两个实体类
4.maven命令clean install
5.订单80和支付8001分别改造
（1）删除各自的原先有过的entities文件夹
（2）各自黏贴POM内容
<dependency>
<groupId>com.radish.springcloudgroupId>
<artifactId>cloud-api-commonsartifactId>
<version>${project.version}version>
dependency>
