一、SpringCloud学习笔记之微服务架构编码构建

微服务架构编码构建

约定 > 配置 > 编码

版本：
cloud：Hoxton.SR1
boot：2.2.2.RELEASE
cloud Alibaba：2.1.0.RELEASE
java：8
maven：3.5及以上

mysql：5.7及以上

IDEA新建project工作空间

1、微服务cloud整体聚合父工程Project

1.New Project

2、聚合总工程名字

3、MAVEN选择版本

4、字符编码

4、注解生效激活

5、JDK编译版本1.8

5、File Type文件过滤

6、父工程POM文件

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

<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>4.0.0</modelVersion>

  <groupId>com.liang.springcloud</groupId>
  <artifactId>cloud</artifactId>
  <version>1.0-SNAPSHOT</version>
  <modules>
    <module>cloud-provider-payment8001</module>
      <module>common</module>
    <module>cloud-consumer-order80</module>
  </modules>
  <packaging>pom</packaging>

  <!-- 统一管理jar包版本 -->
  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.source>1.8</maven.compiler.source>
    <maven.compiler.target>1.8</maven.compiler.target>
    <junit.version>4.12</junit.version>
    <log4j.version>1.2.17</log4j.version>
    <lombok.version>1.18.8</lombok.version>
    <mysql.version>8.0.17</mysql.version>
    <druid.version>1.1.13</druid.version>
    <mybatis.spring.boot.version>1.3.0</mybatis.spring.boot.version>
  </properties>

  <!-- 子模块继承之后，提供作用：锁定版本+子modlue不用写groupId和version  -->
  <dependencyManagement>
    <dependencies>
      <!--spring boot 2.2.2-->
      <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-dependencies</artifactId>
        <version>2.2.2.RELEASE</version>
        <type>pom</type>
        <scope>import</scope>
      </dependency>
      <!--spring cloud Hoxton.SR1-->
      <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-dependencies</artifactId>
        <version>Hoxton.SR1</version>
        <type>pom</type>
        <scope>import</scope>
      </dependency>
      <!--spring cloud alibaba 2.1.0.RELEASE-->
      <dependency>
        <groupId>com.alibaba.cloud</groupId>
        <artifactId>spring-cloud-alibaba-dependencies</artifactId>
        <version>2.1.0.RELEASE</version>
        <type>pom</type>
        <scope>import</scope>
      </dependency>

      <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>${mysql.version}</version>
      </dependency>
      <dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>druid</artifactId>
        <version>${druid.version}</version>
      </dependency>
      <dependency>
        <groupId>org.mybatis.spring.boot</groupId>
        <artifactId>mybatis-spring-boot-starter</artifactId>
        <version>${mybatis.spring.boot.version}</version>
      </dependency>
      <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>${junit.version}</version>
      </dependency>
<!--      <dependency>-->
<!--        <groupId>log4j</groupId>-->
<!--        <artifactId>log4j</artifactId>-->
<!--        <version>${log4j.version}</version>-->
<!--      </dependency>-->
      <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <version>${lombok.version}</version>
        <optional>true</optional>
      </dependency>
    </dependencies>
  </dependencyManagement>
  <build>
    <plugins>
      <plugin>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-maven-plugin</artifactId>
        <configuration>
          <fork>true</fork>
          <addResources>true</addResources>
        </configuration>
      </plugin>
    </plugins>
  </build>
</project>

7、Maven中的dependencyManagement和dependencies

8、maven中跳过单元测试

9、父工程创建完成执行mvn:install将父工程发布到仓库方便子工程继承

2、Rest微服务工程构建

2.1.cloud-provider-payment8001微服务提供者支付Module模块

1、建cloud-provider-payment8001 （Test 我已经构建过了 ）



2、改POM

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

<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>4.0.0</modelVersion>
  <parent>
    <artifactId>cloud</artifactId>
    <groupId>com.liang.springcloud</groupId>
    <version>1.0-SNAPSHOT</version>
  </parent>
  <artifactId>cloud-provider-payment8001</artifactId>

  <dependencies>
  //公共 工具类、方法等
    <dependency>
      <groupId>com.liang.springcloud</groupId>
      <artifactId>common</artifactId>
      <version>1.0-SNAPSHOT</version>
    </dependency>


    <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web -->
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-web</artifactId>
    </dependency>

    <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web -->
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-actuator</artifactId>
    </dependency>

    <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web -->
    <dependency>
      <groupId>org.mybatis.spring.boot</groupId>
      <artifactId>mybatis-spring-boot-starter</artifactId>
    </dependency>

    <!-- https://mvnrepository.com/artifact/com.alibaba/druid -->
    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>druid-spring-boot-starter</artifactId>
      <version>1.1.10</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
    </dependency>

    <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-jdbc -->
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-jdbc</artifactId>
    </dependency>

    <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-devtools -->
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-devtools</artifactId>
      <scope>runtime</scope>
      <optional>true</optional>
    </dependency>

    <!-- https://mvnrepository.com/artifact/org.projectlombok/lombok -->
    <dependency>
      <groupId>org.projectlombok</groupId>
      <artifactId>lombok</artifactId>
      <optional>true</optional>
    </dependency>

    <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-test -->
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-test</artifactId>
      <scope>test</scope>
    </dependency>
  </dependencies>
</project>

3、新建application.yml文件

内容：

server:
  port: 8001


spring:
  application:
    name: cloud-payment-service
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://localhost:3306/cloud?useUnicode=true&characterEncoding=utf-8&useSSL=false
    username: root
    password: root
mybatis:
  mapperLocations: classpath:mapper/*.xml
  type-aliases-package: com.atguigu.springcloud.model

4、新建主启动类PaymentApplication

package com.liang.cloud;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@MapperScan("com.liang.cloud.mapper")
@SpringBootApplication
public class PaymentApplication {
    public static void main(String[] args) {
        SpringApplication.run(PaymentApplication.class,args);
    }
}

5、业务类
【sql】

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

【model】
主实体Payment
Json封装体CommonResult
因为有多个模块需要用到这两个类，所以将他提取到公共common模块
【mapper】

package com.liang.cloud.mapper;
import com.liang.model.CommonResult;
import com.liang.model.Payment;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Param;
import org.apache.ibatis.annotations.Select;
public interface PaymentMapper {
    @Select("select * from payment where id = #{id}")
    Payment select(@Param("id") Long id);
    @Insert("insert into payment (serial) values (#{serial})")
    int insert(Payment payment);
}

【service】

package com.liang.cloud.service;
import com.liang.model.Payment;
public interface IPaymentService {
    Payment select(Long id);
    int insert(Payment payment);
}

【impl】

package com.liang.cloud.service.impl;

import com.liang.cloud.mapper.PaymentMapper;
import com.liang.cloud.service.IPaymentService;
import com.liang.model.CommonResult;
import com.liang.model.Payment;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class PaymentServiceImpl implements IPaymentService {
    @Autowired
    PaymentMapper paymentMapper;

    @Override
    public Payment select(Long id) {
        return paymentMapper.select(id);
    }

    @Override
    public int insert(Payment payment) {
        return paymentMapper.insert(payment);
    }
}

【controller】

package com.liang.cloud.controller;
import com.liang.cloud.service.IPaymentService;
import com.liang.model.CommonResult;
import com.liang.model.Payment;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

@RestController
@RequestMapping("/payment")
public class PaymentController {

    @Autowired
    IPaymentService paymentService;
    @PostMapping(value = "/create")
    public CommonResult create(@RequestBody Payment payment){
        int result = paymentService.insert(payment);
        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 = "/get/{id}")
    public CommonResult getPaymentById(@PathVariable("id") Long id){
        Payment payment = paymentService.select(id);
        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);
        }
    }

}

6、测试
http://localhost:8001/payment/get/31

postman模拟post
7、结构图

总结：
1.建module
2.改POM
3.写YML
4.主启动
5.业务类

2.2.cloud-consumer-order80微服务消费者订单Module模块

操作流程一样
POM文件：

<?xml version="1.0" encoding="UTF-8"?>
<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>cloud</artifactId>
        <groupId>com.liang.springcloud</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>cloud-consumer-order80</artifactId>
    <dependencies>
        <dependency>
            <groupId>com.liang.springcloud</groupId>
            <artifactId>common</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web  -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-devtools -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.projectlombok/lombok -->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-test -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>


</project>

yml文件：

server:
  port: 80

主启动类：

package com.liang.cloud;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

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

使用RestTemplate进行调用

是什么：RestTemplate提供了多种方便快捷访问远程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类
官网地址：
https://docs.spring.io/spring-framework/docs/5.2.2.RELEASE/javadoc-api/org/springframework/web/client/RestTemplate.html

新建config配置类：

package com.liang.cloud.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();
    }
}

Controller：

package com.liang.cloud.controller;


import com.liang.model.CommonResult;
import com.liang.model.Payment;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

@RestController
@Slf4j
@RequestMapping("/order")
public class OrderController {
    //需要调用服务的地址
    public static final String PAYMENT_URL= "http://localhost:8001";

    @Autowired
    private RestTemplate restTemplate;

    @GetMapping("/create")
    public CommonResult<Payment> create(Payment payment){
        return restTemplate.postForObject(PAYMENT_URL+"/payment/create",payment,CommonResult.class);
        //POST请求 对应方法参数列表需要加上@RequestBody注解
       //请求地址：PAYMENT_URL+"/payment/create"
       //参数：payment
       //返回值：CommonResult.class
    }


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

测试：
先启动cloud-provider-payment8001
再启动cloud-consumer-order80

http://localhost/consumer/payment/get/32

不要忘记@RequestBody注解：

2.3.common公共模块

POM文件：

<?xml version="1.0" encoding="UTF-8"?>
<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>cloud</artifactId>
        <groupId>com.liang.springcloud</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>common</artifactId>

    <dependencies>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
    </dependencies>
</project>

目前只提取了相同的CommonResulet以及Payment

对应代码
CommonResulet：

package com.liang.model;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

@Data   //get set 方法
@AllArgsConstructor  //全参构造器
@NoArgsConstructor   //无参构造器
public class CommonResult <T> extends Payment {
    private Integer code;
    private String message;
    private T data;
    public CommonResult(Integer code,String message){
        this(code,message,null);
    }
}

使用lombok idea下载插件

Payment：

package com.liang.model;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import lombok.ToString;

import java.io.Serializable;
@Data
@AllArgsConstructor
@NoArgsConstructor
@ToString
public class Payment implements Serializable {
    private Long id;
    private String serial;
}

maven命令clean install
在消费者订单模块及提供者支付模块Pom文件加入
ps：上面的pom已经引入了

  <dependency>
      <groupId>com.liang.springcloud</groupId>
      <artifactId>common</artifactId>
      <version>1.0-SNAPSHOT</version>
  </dependency>

目前样图：