SpringCloud 微服务搭建

我是苞谷
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一、微服务架构编码构建

① 约定 > 配置 > 编码

  1. slave会从master读取binlog来进行数据同步

  2. 三步骤+原理图

    image-20201006220405125

    • MySQL复制过程分成三步：
      1 master将改变记录到二进制日志（binary log）。这些记录过程叫做二进制日志事件，binary log events；
      2 slave将master的binary log events拷贝到它的中继日志（relay log）；
      3 slave重做中继日志中的事件，将改变应用到自己的数据库中。 MySQL复制是异步的且串行化的

② IDEA 新建project 工作空间

1.微服务cloud 整体聚合父工程 Project

​ 父工程步骤：

1） New Project

image-20201007105232669

2）聚合总工程名字和工程名字（idea 2020.2 版本）

image-20201007105535326

整理了一份Java核心知识点。覆盖了JVM、锁、并发、Java反射、Spring原理、微服务、Zookeeper、数据库、数据结构等大量知识点。基本上涵盖了Java架构所有的技术知识点的资料，还覆盖了大厂面试题，同时也有一些springboot等项目源码分享给大家

![](https://p1-juejin.byteimg.com/tos-cn-i-k3u1fbpfcp/2ce8d6774b9d4a96a83b884ad2e413c5~tplv-k3u1fbpfcp-watermark.image)
![](https://p9-juejin.byteimg.com/tos-cn-i-k3u1fbpfcp/426bcb0376ac421db3012859528863d6~tplv-k3u1fbpfcp-watermark.image)

由于资料图片太多就不一一的展示出来了 如果需要获取到这个 扫一扫

3）选择Maven 版本

image-20201007105655931

4）字符编码

image-20201007110105043

5） 注解生效激活

image-20201007110442711

6）Java 编译版本选择8

image-20201007110543699

  1. File Type 过滤

image-20201007110748680

2.父工程

<?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.oy</groupId>
    <artifactId>clould</artifactId>
    <version>1.0-SNAPSHOT</version>
    <modules>
        <module>cloud-provider-payment8001</module>
    </modules>
    <packaging>pom</packaging>

    <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>1.16.18</lombok.version>
        <mysql.version>8.0.19</mysql.version>
        <druid.version>1.1.16</druid.version>
        <spring.boot.version>2.2.2.RELEASE</spring.boot.version>
        <spring.cloud.version>Hoxton.SR1</spring.cloud.version>
        <spring.cloud.alibaba.version>2.1.0.RELEASE</spring.cloud.alibaba.version>
        <mybatis.spring.boot.version>1.3.0</mybatis.spring.boot.version>
    </properties>

    <!--子模块继承后,提供作用:锁定版本+子module不用groupId和version-->
    <dependencyManagement>
        <dependencies>
            <!--springboot 2.2.2-->
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>${spring.boot.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <!--Spring cloud Hoxton.SR1-->
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring.cloud.version}</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>${spring.cloud.alibaba.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>mysql</groupId>
                <artifactId>mysql-connector-java</artifactId>
                <version>${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>org.projectlombok</groupId>
                <artifactId>lombok</artifactId>
                <version>${lombok.version}</version>
            </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>
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3.Maven 工程落地细节复习

Maven 中的 dependencyManagement 和 dependencies

image-20201007114601490

maven 中跳过单元测试

image-20201007114648701

4.父工程创建完成执行mvn:insall将父工程发布到仓库方便子工程继承

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cloud-provider-payment8001

​ 创建完成之后请回到父工程产看pom文件的变化

1\. **改POM 文件**
1

<?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>clould</artifactId>
        <groupId>com.oy</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>cloud-provider-payment8001</artifactId>

    <dependencies><!--
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-devtoo
        ls -->
        <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>
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  1. 写 YML

    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/db2019?useUnicode=true&characterEncoding=utf-8&useSSL=false username: root password: 6090 mybatis: mapperLocations: classpath:mapper/*.xml type-aliases-package: com.oy.springcloud.entities # 所有Entity别名类所在包 1234567891011121314

注意：有可能在编译时会出现以下的异常

The server time zone value ‘�й���׼ʱ��’ is unrecogni

需要在配置文件中的datasource.url 后面添加上 serverTimezone=UTC

url: jdbc:mysql://localhost:3306/db2019?useUnicode=true&characterEncoding=utf-8&useSSL=false&serverTimezone=UTC
1

  1. 主启动类

    @SpringBootApplication public class PaymentMain8001 { public static void main(String[] args) { SpringApplication.run(PaymentMain8001.class, args); } } 123456

  2. 业务类

  • 建表 SQL

    CREATE TABLE payment ( id bigint(20) NOT NULL AUTO_INCREMENT COMMENT '主键', serial varchar(200) CHARACTER SET utf8 COLLATE utf8_general_ci DEFAULT NULL COMMENT '支付流水号', PRIMARY KEY (id) USING BTREE ) ENGINE = InnoDB CHARACTER SET = utf8 COLLATE = utf8_general_ci COMMENT = '支付表' ROW_FORMAT = Dynamic; 123456789

  • emtities

​ 主实体 Payment

package com.oy.springcloud.entities;

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

import java.io.Serializable;

/**
 * @Author OY
 * @Date 2020/10/7
 */

@Data
@AllArgsConstructor 
@NoArgsConstructor
public class Payment implements Serializable {
    private Long id;
    private String serial;
}
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  • Json 封装 CommonResult

    package com.oy.springcloud.entities;

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

    /**

    • @Author OY

    • @Date 2020/10/7 */ @Data @AllArgsConstructor @NoArgsConstructor public class CommonResult { private Integer code; private String message; private T data;

      public CommonResult(Integer code, String message){ this.code = code; this.message = message; } } 1234567891011121314151617181920212223

  • Dao

    @Mapper public interface PaymentDao { public int create(Payment payment);

    public Payment getPaymentById(@Param("id") Long id);

    } 123456

​ mybatis 的映射文件为 PaymentMapper.xml, 路径为 src\main\resources\mapper\ParmentMapper.xml

image-20201007214208365

PaymentMapper.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">

<mapper namespace="com.oy.springcloud.dao.PaymentDao">
    <!--public int create(Payment payment);-->
    <insert id="create" parameterType="Payment" useGeneratedKeys="true" keyProperty="id">
        insert into payment(serial) values(#{serial})
    </insert>

    <!--public Payment getPaymentById(@Param("id") Long id);-->
    <resultMap id="BaseResult" type="com.oy.springcloud.entitles.Payment">
        <id column="id" property="id" jdbcType="BIGINT"/>
        <id column="serial" property="serial" jdbcType="VARCHAR"/>
    </resultMap>

    <select id="getPaymentById" parameterType="Long" resultMap="BaseResult">
        select * from payment where id=#{id}
    </select>
</mapper>
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  • Service

​ 接口类 PaymentService

package com.oy.springcloud.service;

import com.oy.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
}
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​ 实体类

package com.oy.springcloud.service.impl;

import com.oy.springcloud.dao.PaymentDao;
import com.oy.springcloud.entities.Payment;
import com.oy.springcloud.service.PaymentService;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;

@Service
public class PaymentServiceImpl implements PaymentService {

    @Resource // @Autowired
    private PaymentDao paymentDao;

    @Override
    public int create(Payment payment){
        return paymentDao.create(payment);
    }

    @Override
    public Payment getPaymentById(Long id){
        return paymentDao.getPaymentById(id);
    }
}
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  • controller

    @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);

    // 成功
    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("*****查询结果： " + payment);

    // 成功
    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);
    }
}

    } 12345678910111213141516171819202122232425262728293031323334

  • 测试

    http://localhost:8001/payment/get/1

    image-20201007214451413

    postman 模拟 post

image-20201007214840114

通过修改 idea 的 workpace.xml 的方式来快速打开 Run DashBoard窗口 开启 Run DashBoard(个别版本需要)

image-20201007215209598

<option name="configurationTypes">
      <set>
        <option value="SpringBootApplicationConfigurationType" />
      </set>
</option>
12345

image-20201007215330956

注意：部分同学可能由于 idea 版本不同， 需要关闭重启

(2) 热部署 Devtools

  1. Adding devtools to your project

    org.springframework.boot spring-boot-devtools runtime true 1234567

  2. Adding plugin to your pom.xml

    // 下面这一段粘贴在父POM.xml中 org.springframework.boot spring-boot-maven-plugin true true 12345678910111213

3.Enabling automatic build

image-20201007215949539

4.Update the value of

image-20201007220138509

image-20201007220250444

(3) cloud-consumer-order80 微服务消费者订单 Module模块

​ 建 cloud-consumer-order80

image-20201007230821048

  1. 改 POM

    clould com.oy 1.0-SNAPSHOT 4.0.0

    <artifactId>cloud-consumer-order80</artifactId>

<dependencies>
    <!--
    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-devtoo
    ls -->
    <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>
    12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152

  2. 写YML

    server: port: 80 12

  3. 主启动

    package com.oy.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); } } 1234567891011

  4. 业务类

创建 entities(将 cloud-provider-payment8001 工程下的entities 包下的两个实体复制过来）

image-20201007232336408

RestTemplate:

​ image-20201007232442081

官网及使用

​ 官网地址：docs.spring.io/spring-fram…

​ 使用：使用restTemplate访问restful接口非常的简单的粗暴无脑。（url, reuestMap, ResponseBean.class）这三个参数分别代表REST请求地址、请求参数、HTTP响应转换成的对象类型。

config 配置类

package com.oy.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();
    }
}
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  1. 测试
  • 先启动 cloud-provider-payment8001
  • 再启动 cloud-consumer-order80

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

image-20201008000733052

不要忘记@RequestBody 注解，不然在测试 http://localhost/consumer/payment/create?serial=“商店003”

image-20201008001000661

image-20201008001511416

(4) 工程重构

观察问题：系统中有重复的部分

image-20201008105959818

重构

  • 新建 cloud-api-commons

image-20201008110313363

  • POM

    clould com.oy 1.0-SNAPSHOT 4.0.0

    <artifactId>cloud-api-commons</artifactId>

<dependencies>
    <!--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>
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <optional>true</optional>
    </dependency>
    <!--https://mvnrepository.com/artifact/cn.hutool/hutool-all -->
    <dependency>
        <groupId>cn.hutool</groupId>
        <artifactId>hutool-all</artifactId>
        <version>5.1.0</version>
    </dependency>
</dependencies>
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  • 在 cloud-api-commons 项目下创建 entities 的 Payment 和 CommonResult 封装类

image-20201008111037541

  • 使用maven 命名 clean 和 install 命令，把它存储到仓库里，方便其他的项目的复用。

image-20201008111441609

  • 对订单80 和 支付8001 分别改造， 删除各自原有的entities 文件夹, 各自黏贴 POM内容 80、8001

    这里根据自己设置来定// com.oy 这是我自己的，不清楚查看一下自己的仓库 cloud-api-commons ${project.version} 12345

② 目前项目样图

image-20201008112551640

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