一、创建父工程

1.父工程pom文件

  1. <?xml version="1.0" encoding="UTF-8"?>
  3. <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  4.   xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  5.   <modelVersion>4.0.0</modelVersion>
  7.   <groupId>com.atguigu.com</groupId>
  8.   <artifactId>cloud2020</artifactId>
  9.   <version>1.0-SNAPSHOT</version>
  10.   <packaging>pom</packaging>
  13.   <!-- 统一管理jar包版本 -->
  14.   <properties>
  15.     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  16.     <maven.compiler.source>1.8</maven.compiler.source>
  17.     <maven.compiler.target>1.8</maven.compiler.target>
  18.     <junit.version>4.12</junit.version>
  19.     <log4j.version>1.2.17</log4j.version>
  20.     <lombok.version>1.16.18</lombok.version>
  21.     <druid.version>1.1.16</druid.version>
  22.     <mybatis.spring.boot.version>1.3.0</mybatis.spring.boot.version>
  23.   </properties>
  25.   <!-- 子模块继承之后，提供作用：锁定版本+子modlue不用写groupId和version  -->
  26.   <dependencyManagement>
  27.     <dependencies>
  28.       <!--spring boot 2.2.2-->
  29.       <dependency>
  30.         <groupId>org.springframework.boot</groupId>
  31.         <artifactId>spring-boot-dependencies</artifactId>
  32.         <version>2.2.2.RELEASE</version>
  33.         <type>pom</type>
  34.         <scope>import</scope>
  35.       </dependency>
  36.       <!--spring cloud Hoxton.SR1-->
  37.       <dependency>
  38.         <groupId>org.springframework.cloud</groupId>
  39.         <artifactId>spring-cloud-dependencies</artifactId>
  40.         <version>Hoxton.SR1</version>
  41.         <type>pom</type>
  42.         <scope>import</scope>
  43.       </dependency>
  44.       <!--spring cloud alibaba 2.1.0.RELEASE-->
  45.       <dependency>
  46.         <groupId>com.alibaba.cloud</groupId>
  47.         <artifactId>spring-cloud-alibaba-dependencies</artifactId>
  48.         <version>2.1.0.RELEASE</version>
  49.         <type>pom</type>
  50.         <scope>import</scope>
  51.       </dependency>
  52.       <dependency>
  53.         <groupId>mysql</groupId>
  54.         <artifactId>mysql-connector-java</artifactId>
  55.         <version>8.0.17</version>
  56.       </dependency>
  57.       <dependency>
  58.         <groupId>com.alibaba</groupId>
  59.         <artifactId>druid</artifactId>
  60.         <version>${druid.version}</version>
  61.       </dependency>
  62.       <dependency>
  63.         <groupId>org.mybatis.spring.boot</groupId>
  64.         <artifactId>mybatis-spring-boot-starter</artifactId>
  65.         <version>${mybatis.spring.boot.version}</version>
  66.       </dependency>
  67.       <dependency>
  68.         <groupId>junit</groupId>
  69.         <artifactId>junit</artifactId>
  70.         <version>${junit.version}</version>
  71.       </dependency>
  72.       <dependency>
  73.         <groupId>log4j</groupId>
  74.         <artifactId>log4j</artifactId>
  75.         <version>${log4j.version}</version>
  76.       </dependency>
  77.       <dependency>
  78.         <groupId>org.projectlombok</groupId>
  79.         <artifactId>lombok</artifactId>
  80.         <version>${lombok.version}</version>
  81.         <optional>true</optional>
  82.       </dependency>
  83.     </dependencies>
  84.   </dependencyManagement>
  86.   <build>
  87.     <plugins>
  88.       <plugin>
  89.         <groupId>org.springframework.boot</groupId>
  90.         <artifactId>spring-boot-maven-plugin</artifactId>
  91.         <configuration>
  92.           <fork>true</fork>
  93.           <addResources>true</addResources>
  94.         </configuration>
  95.       </plugin>
  96.     </plugins>
  97.   </build>
  98. </project>

二.创建cloud-provider-payment8001(maven模块)

image.png

1.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>cloud2020</artifactId>
        <groupId>com.atguigu.com</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

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

    <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>

</project>

2.YAML

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: com.mysql.cj.jdbc.Driver   #8.0版本
    url: jdbc:mysql://localhost:3306/db2019?useUnicode=true&characterEncoding=utf-8&useSSL=false
    username: root
    password: root


mybatis:
  mapper-locations: classpath:mapper/*.xml
  type-aliases-package: com.atguigu.springcloud.entities

3.启动类

package com.atguigu.springcloud;

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

@SpringBootApplication
public class PaymentMain8001 {

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

}

(1).创建payment表

CREATE TABLE `payment` (
  `id` bigint NOT NULL AUTO_INCREMENT,
  `serial` varchar(200) DEFAULT '',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

4.entities

(1).实体类

package com.atguigu.springcloud.entities;

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

import java.io.Serializable;

@Data
@AllArgsConstructor
@NoArgsConstructor
public class Payment implements Serializable {

    private Long id;

    private String serial;
}

(2).返回结果对象

package com.atguigu.springcloud.entities;

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

@Data
@AllArgsConstructor
@NoArgsConstructor
public class CommonResult<T> {


    private Integer code;

    private String message;

    private T data;


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


}

5.dao接口

(1).dao

package com.atguigu.springcloud.dao;

import com.atguigu.springcloud.entities.Payment;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Param;

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

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

}

(2).resources下添加mapper文件夹 添加mapper.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.atguigu.springcloud.dao.PaymentDao">

    <resultMap id="BaseResultMap" type="com.atguigu.springcloud.entities.Payment">
        <id column="id" property="id" jdbcType="BIGINT"/>
        <result column="serial" property="serial" jdbcType="VARCHAR"/>
    </resultMap>

    <insert id="create" parameterType="Payment" useGeneratedKeys="true" keyProperty="id">
        INSERT INTO payment(SERIAL) VALUES(#{serial});
    </insert>

    <select id="getPaymentById" parameterType="Long" resultMap="BaseResultMap" >
        SELECT * FROM payment WHERE id=#{id};
    </select>

</mapper>

6.service

(1).service接口

package com.atguigu.springcloud.service;

import com.atguigu.springcloud.entities.Payment;
import org.apache.ibatis.annotations.Param;

/**
 * @auther zzyy
 * @create 2020-01-27 21:11
 */
public interface PaymentService
{
    public int create(Payment payment);

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

}

(2).实现类

package com.atguigu.springcloud.service.impl;

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

import javax.annotation.Resource;

/**
 * @auther zzyy
 * @create 2020-01-27 21:12
 */
@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);
    }
}

7.controller

package com.atguigu.springcloud.controller;

import com.atguigu.springcloud.entities.CommonResult;
import com.atguigu.springcloud.entities.Payment;
import com.atguigu.springcloud.service.PaymentService;
import com.sun.media.jfxmedia.logging.Logger;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.*;

import javax.annotation.Resource;

/**
 * @auther zzyy
 * @create 2020-01-27 21:17
 */
@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("*****插入操作返回结果:" + 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<Payment> getPaymentById(@PathVariable("id") Long id)
    {
        Payment payment = paymentService.getPaymentById(id);
        log.info("*****查询结果:{}",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);
        }
    }
}

三、热部署devtools

1.Adding devtools to your project

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

2.Adding plugin to your pom.xml

下段配置我们粘贴进聚合父类总工程的pom.xml里


<build>
    <finalName>你自己的工程名字</finalName>
    <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.Enabling automatic build

image.png
image.png

4.Update the value of

image.png
image.png

5.重启IDEA

四、创建cloud-consumer-order80(maven)

1.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>cloud2020</artifactId>
        <groupId>com.atguigu.com</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

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

    <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>

</project>

2.YAML

server:
  port: 80

3.启动类

package com.atguigu.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);
    }
}

(1).创建payment表

CREATE TABLE `payment` (
  `id` bigint NOT NULL AUTO_INCREMENT,
  `serial` varchar(200) DEFAULT '',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

4.entities

(1).实体类


package com.atguigu.springcloud.entities;

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

import java.io.Serializable;

/**
 * @auther zzyy
 * @create 2019-12-05 11:50
 */
@Data
@AllArgsConstructor
@NoArgsConstructor
public class Payment implements Serializable
{
    private Long id;
    private String serial;
}

(2).返回结果对象

package com.atguigu.springcloud.entities;

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


package com.atguigu.springcloud.entities;

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

/**
 * @auther zzyy
 * @create 2019-12-05 11:53
 */
public class CommonResult<T>
{
    private Integer code;
    private String message;
    private T data;

    public CommonResult()
    {
    }

    public CommonResult(Integer code, String message, T data)
    {
        this.code = code;
        this.message = message;
        this.data = data;
    }
    public CommonResult( Integer code,String message) {
        this( code, message,null);
    }

    public CommonResult(T data) {
        this(200, "操作成功", data);
    }

    //setter--getter
    public T getData() {
        return data;
    }

    public void setData(T data) {
        this.data = data;
    }

    public String getMessage() {
        return message;
    }

    public void setMessage(String message) {
        this.message = message;
    }

    public Integer getCode() {
        return code;
    }

    public void setCode(Integer code) {
        this.code = code;
    }
}

5.RestTemplate

5.1.RestTemplate

(1).是什么？

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

(2).官网及使用

官网地址
https://docs.spring.io/spring-framework/docs/5.2.2.RELEASE/javadoc-api/org/springframework/web/client/RestTemplate.html

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

2.config配置类


package com.atguigu.springcloud.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.client.RestTemplate;

/**
 * @auther zzyy
 * @create 2019-12-27 12:50
 */
@Configuration
public class ApplicationContextConfig
{
    @Bean
    public RestTemplate restTemplate()
    {
        return new RestTemplate();
    }
}

7.controller


package com.atguigu.springcloud.controller;

import com.atguigu.springcloud.entities.CommonResult;
import com.atguigu.springcloud.entities.Payment;
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.RestController;
import org.springframework.web.client.RestTemplate;

/**
 * @auther zzyy
 * @create 2019-12-27 12:16
 */
@RestController
public class OrderController
{

    public static final String PaymentSrv_URL = "http://localhost:8001";

    @Autowired
    private RestTemplate restTemplate;

    @GetMapping("/consumer/payment/create") //客户端用浏览器是get请求，但是底层实质发送post调用服务端8001
    public CommonResult create(Payment payment)
    {
        return restTemplate.postForObject(PaymentSrv_URL + "/payment/create",payment,CommonResult.class);
    }


    @GetMapping("/consumer/payment/get/{id}")
    public CommonResult getPayment(@PathVariable Long id)
    {
        return restTemplate.getForObject(PaymentSrv_URL + "/payment/get/"+id, CommonResult.class, id);
    }
}

8.测试

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

9.工程重构

9.1.观察问题-系统中有重复部分，重构

image.png

9.2.新建cloud-api-commons模块(maven)

image.png

9.3.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">
    <parent>
        <artifactId>cloud2020</artifactId>
        <groupId>com.atguigu.com</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

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

    <dependencies>
        <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>cn.hutool</groupId>
            <artifactId>hutool-all</artifactId>
            <version>5.1.0</version>
        </dependency>
    </dependencies>
</project>

9.4.entities

(1).Payment实体


package com.atguigu.springcloud.entities;

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

import java.io.Serializable;

/**
 * @auther zzyy
 * @create 2019-12-27 14:50
 */
@Data
@AllArgsConstructor
@NoArgsConstructor
public class Payment implements Serializable
{
    private Long id;
    private String serial;
}

(2).CommonResult通用封装类


package com.atguigu.springcloud.entities;

/**
 * @auther zzyy
 * @create 2019-12-27 14:51
 */
public class CommonResult<T>
{
    private Integer code;
    private String message;
    private T data;

    public CommonResult()
    {
    }

    public CommonResult(Integer code, String message, T data)
    {
        this.code = code;
        this.message = message;
        this.data = data;
    }
    public CommonResult( Integer code,String message) {
        this( code, message,null);
    }

    public CommonResult(T data) {
        this(200, "操作成功", data);
    }

    //setter--getter
    public T getData() {
        return data;
    }

    public void setData(T data) {
        this.data = data;
    }

    public String getMessage() {
        return message;
    }

    public void setMessage(String message) {
        this.message = message;
    }

    public Integer getCode() {
        return code;
    }

    public void setCode(Integer code) {
        this.code = code;
    }
}

9.5.maven命令 clean install

image.png

9.6.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).各自粘贴POM内容
port:80 port:8001pom 分别引入api-commons模块

                 <dependency><!-- 引入自己定义的api通用包，可以使用Payment支付Entity -->
            <groupId>com.atguigu.springcloud</groupId>
            <artifactId>cloud-api-commons</artifactId>
             <version>1.0-SNAPSHOT</version>
        </dependency>