SpringCloud学习笔记——环境搭建

其他 2020-06-25 10:58:20 阅读次数: 0

SpringCloud学习笔记——环境搭建

参考：尚硅谷2020最新版SpringCloud(H版&alibaba)——周阳

1. 环境搭建

1. 创建父工程

  1. pom依赖

    <!-- 配置打包方式 -->
<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>1.16.18</lombok.version>
    <mysql.version>5.1.47</mysql.version>
    <druid.version>1.1.16</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>

  2. ss

2. 创建子模块1：支付模块

  1. 子模块名称

    cloud-provider-payment8001

  2. pom依赖

    <dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-actuator</artifactId>
    </dependency>
    <dependency>
        <groupId>org.mybatis.spring.boot</groupId>
        <artifactId>mybatis-spring-boot-starter</artifactId>
    </dependency>
    <dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>druid-spring-boot-starter</artifactId>
        <version>1.1.10</version>
    </dependency>
    <!--mysql-connector-java-->
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
    </dependency>
    <!--jdbc-->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-jdbc</artifactId>
    </dependency>
    <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>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
</dependencies>

  3. 创建application.yml

    server:
  port: 8001

spring:
  application:
    name: cloud-provider-payment
  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/springcloudstudy?serverTimezone=Asia/Shanghai&useSSL=true&useUnicode=true&characterEncoding=UTF-8
    username: root
    password: root

mybatis:
  mapperLocations: classpath:mapper/*.xml
  type-aliases-package: com.naclo.entities    # 所有Entity别名类所在包

  4. 创建主启动类PaymentMain8001

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

  5. 编写业务类

    1. 创建数据库，表

      # 创建数据库
CREATE DATABASE `springcloudstudy`;

# 建payment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;

# 插入数据
INSERT INTO payment(serial) values ('123456');

    2. 创建实体类

      主实体Payment

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

      json封装实体CommonResult

      @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);
    }
}

    3. dao

      PaymentDao

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

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

      PaymentMapper

      <?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.naclo.dao.PaymentDao">

    <insert id="create" parameterType="Payment" useGeneratedKeys="true" keyProperty="id">
        insert into payment(serial)
        values (#{serial});
    </insert>

    <resultMap id="BaseResultMap" type="com.naclo.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

      public interface PaymentService {
    public int create(Payment payment);

    public Payment getPaymentById(Long id);
}

      PaymentServiceImpl

      @Service
public 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);
    }
}

    5. controller

      PaymentController

      @RestController
@Slf4j
public class PaymentController {

    @Resource
    private PaymentService paymentService;

    @PostMapping(value = "/payment/create")
    public CommonResult create(@RequestBody Payment payment) {
        int result = paymentService.create(payment);
        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<Payment> getPaymentById(@PathVariable("id") Long id) {
        Payment payment = paymentService.getPaymentById(id);
        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);
        }
    }
}

  6. 启动，测试

    1. get数据

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

      返回：{"code":200,"message":"查询成功","data":{"id":1,"serial":"123456"}}

    2. post数据

      发送：http://localhost:8001/payment/create?serial=222

      返回：{"code":200,"message":"插入数据库成功","data":1}

3. 开启热部署Devtools

  1. 在子工程添加pom依赖

    <dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-devtools</artifactId>
    <scope>runtime</scope>
    <optional>true</optional>
</dependency>

  2. 在父工程pom添加插件

    <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>

  3. 开启自动编译选项

    File | Settings | Build, Execution, Deployment | Compiler

    勾选

    • Automatically show first error in editor
    • Display notification on build completion
    • Build project automatically
    • Compile independent modules in parallel

  4. 注册

    ctrl+shift+alt+/选择1. Registry...

    勾选compiler.automake.allow.when.app.running

  5. 重启

4 创建子模块2：消费者订单模块

  1. 子模块名称

    cloud-consumer-order80

  2. pom依赖

    <dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-actuator</artifactId>
    </dependency>
    <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>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
</dependencies>

  3. 创建application.yml

    server:
  port: 80

  4. 创建主启动类OrderMain80

    @SpringBootApplication
public class OrderMain80 {
    public static void main(String[] args) {
        SpringApplication.run(OrderMain80.class, args);
    }
}

  5. 复制实体类Payment以及CommonResult

  6. 引入RestTemplate

    @Configuration
public class ApplicationContextConfig {
    @Bean
    public RestTemplate getRestTemplate() {
        return new RestTemplate();
    }
}

  7. 编写controller

    @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);
    }
}

  8. 启动，测试

    1. get数据

      发送：http://localhost:80/consumer/payment/get/1

      返回：{"code":200,"message":"查询成功","data":{"id":1,"serial":"123456"}}

    2. post数据

      发送：http://localhost:80/consumer/payment/create?serial=222

      返回：{"code":200,"message":"插入数据库成功","data":1}

5. 工程重构：提取公共模块

  1. 子模块名称

    cloud-api-commons

  2. pom依赖

    <dependencies>
    <!--日常通用jar包配置-->
    <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>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>cn.hutool</groupId>
        <artifactId>hutool-all</artifactId>
        <version>5.1.0</version>
    </dependency>
</dependencies>

  3. 复制实体类Payment以及CommonResult

  4. maven clean install

  5. 在项目中引入自己定义的api

    <dependency><!-- 引入自己定义的api-->
    <groupId>com.naclo</groupId>
    <artifactId>cloud-api-commons</artifactId>
    <version>${project.version}</version>
</dependency>

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