教學(xué)視頻傳送：

springBoot和springCloud的版本選型https://start.spring.io/actuator/info

查看json串返回結(jié)果

這就是我們的選型依據(jù)

本次開發(fā)選用版本如下：

cloud ? ? ? ? : Hoxton.SR1boot ? ? ? ? ?: 2.2.2.RELEASEcloud alibaba : 2.1.0.RELEASEjava ? ? ? ? ?: java8Maven ? ? ? ? : 3.5及以上Mysql ? ? ? ? : 5.7及以上

關(guān)于Cloud各種組件的停更、升級、替換

約定>配置>編碼

IDEA新建project工作空間

微服務(wù)cloud整體聚合工程

父工程步驟New Project

聚合總父工程名字

Maven選版本

工程名字

字符編碼

注解生效激活

java編譯版本選8

File Type過濾

父工程POM

<?xml version="1.0" encoding="UTF-8"?>

xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">

4.0.0

org.springframework.boot

spring-boot-starter-parent

2.2.6.RELEASE

com.top

cloud2020-learn

1.0

cloud2020-learn

pom

Demo project for cloud2020-learn

cloud-provider-payment8001

UTF-8

1.8

1.8

4.12

1.2.17

1.16.18

5.1.47

1.1.16

2.2.2.RELEASE

Hoxton.SR1

2.1.0.RELEASE

1.3.0

org.springframework.boot

spring-boot-dependencies

${spring.boot.version}

pom

import

org.springframework.cloud

spring-cloud-dependencies

${spring.cloud.version}

pom

import

com.alibaba.cloud

spring-cloud-alibaba-dependencies

${spring.cloud.alibaba.version}

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}

org.projectlombok

lombok

${lombok.version}

true

org.springframework.boot

spring-boot-maven-plugin

true

true

nexus-aliyun

Nexus aliyun

http://maven.aliyun.com/nexus/content/groups/public

true

false

Maven工程落地細(xì)節(jié)復(fù)習(xí)

Maven中的DependencyManagement和Dependencies

maven中跳過單元測試

父工程創(chuàng)建完成執(zhí)行mvn:insall將父工程發(fā)布到倉庫方便子工程繼承

Rest微服務(wù)工程搭建

構(gòu)建步驟

1. Cloud-provider-payment8001 微服務(wù)提供者M(jìn)odule模塊

- 建module

- 改POM

org.springframework.boot

spring-boot-starter-web

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.projectlombok

lombok

true

org.springframework.boot

spring-boot-starter-test

test

org.junit.vintage

junit-vintage-engine

- 寫YML

server:port: 8001spring:application:name: cloud-payment-servicedatasource:type: com.alibaba.druid.pool.DruidDataSource ? ? ? ? ? ?# 當(dāng)前數(shù)據(jù)源操作類型driver-class-name: org.gjt.mm.mysql.Driver ? ? ? ? ? ? ?# mysql驅(qū)動包url: jdbc:mysql://localhost:3306/the_course?useUnicode=true&characterEncoding=utf-8&useSSL=falseusername: rootpassword: aaaaaamybatis:mapperLocations: classpath:mapper/*.xmltype-aliases-package: com.top.cloud.provider.payment8001.entities ? ?# 所有Entity別名類所在包

- 主啟動

@SpringBootApplicationpublic class CloudProviderPayment8001Application {

public static void main(String[] args) {

SpringApplication.run(CloudProviderPayment8001Application.class, args);

}

}

- 業(yè)務(wù)類CommonResult

@Data@AllArgsConstructor@NoArgsConstructorpublic class CommonResult

{ ? ?private Integer code; ? ?private String ?message; ? ?private T ? ? ? data; ? ?public CommonResult(Integer code, String message)

{ ? ? ? ?this(code,message,null);

}

}Payment

@Data@AllArgsConstructor@NoArgsConstructorpublic class Payment implements Serializable { ? ?private Long id; ? ?private String name;

}PaymentDao

@Mapperpublic interface PaymentDao { ? ?public int create(Payment payment); ? ?public Payment getPaymentById(@Param("id") Long id);

}PaymentService

public interface PaymentService{ ? ?int create(Payment payment); ? ?Payment getPaymentById(@Param("id") Long id);

}PaymentServiceImpl

@Servicepublic class PaymentServiceImpl implements PaymentService{ ? ?@Resource

private PaymentDao paymentDao; ? ?@Override

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

} ? ?@Override

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

}

}PaymentMapper.xml

insert into payment(name) ?values(#{name}); ? ?

select * from payment where id=#{id}; ? ?PaymentController

@RestController@Slf4jpublic class PaymentController{ ? ?@Resource

private PaymentService paymentService; ? ?@Value("${server.port}")

private String serverPort; ? ?@PostMapping(value = "/payment/create")

public CommonResult create(@RequestBody Payment payment)

{

int result = paymentService.create(payment);

log.info("*****插入結(jié)果："+result); ? ? ? ?if(result > 0)

{ ? ? ? ? ? ?return new CommonResult(200,"插入數(shù)據(jù)庫成功,serverPort: "+serverPort,result);

}else{ ? ? ? ? ? ?return new CommonResult(444,"插入數(shù)據(jù)庫失敗",null);

}

} ? ?@GetMapping(value = "/payment/get/{id}")

public CommonResult getPaymentById(@PathVariable("id") Long id)

{

Payment payment = paymentService.getPaymentById(id); ? ? ? ?if(payment != null)

{ ? ? ? ? ? ?return new CommonResult(200,"查詢成功,serverPort: ?"+serverPort,payment);

}else{ ? ? ? ? ? ?return new CommonResult(444,"沒有對應(yīng)記錄,查詢ID: "+id,null);

}

}

}

- 測試

用postman或者idea自帶的HTTPClient測試接口

2. cloud-consumer-order80 微服務(wù)消費者訂單Module模塊

- 建cloud-consumer-order80

- 改POM

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

org.junit.vintage

junit-vintage-engine

- 寫YML

server:port: 80spring:application:name: cloud-order-service

- 主啟動

@SpringBootApplicationpublic class CloudConsumerOrder80Application {

public static void main(String[] args) {

SpringApplication.run(CloudConsumerOrder80Application.class, args);

}

}

- 業(yè)務(wù)類CommonResult

@Data@AllArgsConstructor@NoArgsConstructorpublic class CommonResult

{ ? ?private Integer code; ? ?private String ?message; ? ?private T ? ? ? data; ? ?public CommonResult(Integer code, String message)

{ ? ? ? ?this(code,message,null);

}

}Payment

@Data@AllArgsConstructor@NoArgsConstructorpublic class Payment implements Serializable { ? ?private Long id; ? ?private String name;

}ApplicationContextConfig

@Configurationpublic class ApplicationContextConfig{ ? ?@Bean

//@LoadBalanced

public RestTemplate getRestTemplate(){ ? ? ? ?return new RestTemplate();

}

}OrderController

@RestController@Slf4jpublic 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);

} ? ?@GetMapping("/consumer/payment/get/{id}")

public CommonResult getPayment(@PathVariable("id") Long id)

{

System.out.println("哈哈"); ? ? ? ?return restTemplate.getForObject(PAYMENT_URL+"/payment/get/"+id,CommonResult.class);

} ? ?@GetMapping("/consumer/payment/getForEntity/{id}")

public CommonResult getPayment2(@PathVariable("id") Long id)

{

ResponseEntity entity = restTemplate.getForEntity(PAYMENT_URL+"/payment/get/"+id,CommonResult.class); ? ? ? ?if(entity.getStatusCode().is2xxSuccessful()){ ? ? ? ? ? ?return entity.getBody();

}else{ ? ? ? ? ? ?return new CommonResult<>(444,"操作失敗");

}

}

}

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

3. 工程重構(gòu)觀察問題： 系統(tǒng)中有重復(fù)部分,重構(gòu)新建cloud-api-common

就是一個最簡單的工程改pom

<?xml version="1.0" encoding="UTF-8"?>

xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">

4.0.0

com.top

cloud2020-learn

1.0

com.top

cloud-api-common

1.0

cloud-api-common

Demo project for cloud-api-common

1.8

org.springframework.boot

spring-boot-devtools

runtime

true

org.projectlombok

lombok

true

提取公共部分

maven命令clean install

其他模塊依賴 刪除各自的原先的entities文件夾

pom中添加：

com.top

cloud-api-common

1.0

修改代碼中的依賴路徑解決SpringBoot項目repackage failed: Unable to find main class Maven打包 install的問題

發(fā)現(xiàn)父項目有一個打包的插件

org.springframework.boot

spring-boot-maven-plugin

repackage

這時，問題就出現(xiàn)了，報打包失敗錯誤！！！解決：如果你的項目是一個放置通用工具類的工程，那么該項目中，就不能包括上面這個打包插件，如果你這個工具類工程依賴有父工程，那么父工程中也不能包括該打包插件，只有你的項目是一個web項目時，含有Main方法的程序入口類，要加該打包插件，我放在了父工程的pom文件中，那就是代表了所有子模塊都有這個打包插件，所以報錯，解決就是去掉這個插件 ，只在web工程中加入這個打包插件！

目前工程樣圖

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