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說明:
1、專欄涉及到的源碼已經同步至https://github.com/SetAlone/springcloud2020(持續更新)
2、springcloud系列博文內容爲學習《尚硅谷2020最新版SpringCloud(H版&alibaba)框架開發教程》的記錄,此係列課程是目前看來個人覺得非常不錯的資源,在此可以與大家進行分享。
3、個人收集到了課程源碼和所需的腦圖、筆記等資源,如需要私信我即可。查找資源不易,希望可以給個點贊和關注。
一、IDEA新建project工作空間
1、New Project
2、聚合總父工程名字
3.、Maven選版本
4、工程名字
5、 字符編碼
6、註解生效激活
7、java編譯版本選8
8、File Type過濾(可做可不做)
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.atguigu.springcloud</groupId>
<artifactId>cloud2020</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>pom</packaging>
<!--統一管理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>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>
<!--子模塊繼承後,提供作用:鎖定版本+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.projectlombok</groupId>
<artifactId>lombok</artifactId>
</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>
<!--第三方maven私服-->
<repositories>
<repository>
<id>nexus-aliyun</id>
<name>Nexus aliyun</name>
<url>http://maven.aliyun.com/nexus/content/groups/public</url>
<releases>
<enabled>true</enabled>
</releases>
<snapshots>
<enabled>false</enabled>
</snapshots>
</repository>
</repositories>
</project>
Maven中的DependencyManagement和Dependencies
這樣做的好處就是: 如果有多個子項目都引用同一樣的依賴,則可以避免在每個使用的子項目裏都聲明一個版本號,這樣想升級或切換到另一個版本時,只需在頂層父容器裏更新,而不需要一個一個子項目的修改;另外如果某個子項目需要另外的一個版本,只需聲明version版本
父工程創建完成執行mvn:insall將父工程發佈到倉庫方便子工程繼承。
二、Rest微服務工程搭建
每次建立一個新的Moudle模塊的時候我們都將進行如下的操作步驟:建moudle,改pom,寫yml,主啓動類、業務類、測試
1.Cloud-provider-payment8001 微服務提供者Module模塊
建moudle
在父工程上右鍵,new——>moudle,新建一個新的maven項目,不需要選擇嚮導。命令爲cloud-provider-payment8001。
創建完成後在父工程的pom文件中查看,會有如下的一個變化,因爲新的子工程是繼承自父工程的。
<modules>
<module>cloud-provider-payment8001</module>
</modules>
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">
<parent>
<artifactId>SpringCloud2020</artifactId>
<groupId>com.atguigu.springcloud</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>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>${lombok.version}</version>
<optional>true</optional>
</dependency>
</dependencies>
</project>
寫yml
在resources文件夾下 創建一個application.yml文件,進行yml文件的編寫
server:
port: 8001
spring:
application:
name: cloud-payment-service
datasource:
type: com.alibaba.druid.pool.DruidDataSource
driver-class-name: org.gjt.mm.mysql.Driver
url: jdbc:mysql://000.000.000.000:3306/db2020_cloud?useUnicode=true&characterEncoding=utf-8&useSSL=false
username: root
password: 123456
mybatis:
mapper-locations: classpath:mapper/*.xml
type-aliases-package: com.atguigu.springcloud.entities
主啓動類
在java文件夾下創建一個新的java文件作爲主啓動類。
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);
}
}
業務類
1、數據庫建表:
DROP TABLE IF EXISTS `payment`;
CREATE TABLE `payment`
(
`id` bigint(20) NOT NULL AUTO_INCREMENT COMMENT '主鍵',
`serial` varchar(200) CHARACTER SET utf8 COLLATE utf8_general_ci DEFAULT NULL COMMENT '支付流水號',
PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB
CHARACTER SET = utf8
COLLATE = utf8_general_ci COMMENT = '支付表'
ROW_FORMAT = Dynamic;
2、實體類entities
主實體Payment
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;
}
Json封裝體CommonResult
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, message, null);
}
}
3、dao
接口PaymentDao
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);
}
4、mybatis的映射文件PaymentMapper.xml
在src\main\resources下創建文件夾mapper,再創建PaymentMapper.xml文件
<?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">
<insert id="insert" parameterType="Payment" useGeneratedKeys="true" keyProperty="id">
insert into payment(serial)
values (#{serial});
</insert>
<!-- 使用resultMap進行映射-->
<resultMap id="BaseResultMap" type="com.atguigu.springcloud.entities.Payment">
<id column="id" property="id" jdbcType="BIGINT"></id>
<id column="serial" property="serial" jdbcType="VARCHAR"></id>
</resultMap>
<select id="getPaymentById" parameterType="Long" resultType="BaseResultMap">
select * from payment where id=#{id};
</select>
</mapper>
5、service
接口PaymentService
package com.atguigu.springcloud.service;
import com.atguigu.springcloud.entities.Payment;
import org.apache.ibatis.annotations.Param;
public interface PaymentService {
public int create(Payment payment);
public Payment getPaymentById(@Param("id") Long id);
}
接口實現類PaymentServiceImpl
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;
@Service
public class PaymentServiceImpl implements PaymentService {
@Resource
private PaymentDao paymentDao;
public int create(Payment payment){
return paymentDao.create(payment);
}
public Payment getPaymentById(Long id){
return paymentDao.getPaymentById(id);
}
}
6、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 lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RestController;
import javax.annotation.Resource;
@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("*****插入結果:" + result);
if (result > 0) {
return new CommonResult(200, "插入數據庫成功", result);
} else {
return new CommonResult(444, "插入數據庫失敗", null);
}
}
@GetMapping(value = "/payment/get/{id}")
public CommonResult GetPaymentById(@PathVariable("id") Long id) {
Payment payment = paymentService.getPaymentById(id);
log.info("*****插入結果:" + payment);
if (payment !=null) {
return new CommonResult(200, "查詢成功", payment);
} else {
return new CommonResult(444, "沒有對應記錄,查詢ID:"+id, null);
}
}
}
測試
-
在瀏覽器輸入http://localhost:8001/payment/get/31進行測試
-
postman模擬post
2、熱部署Devtools
1.Adding devtools to your project
在cloud-provider-payment8001項目的pom文件中添加依賴
<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
在聚合父類總工程的pom.xml裏添加配置
<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.Enabling automatic build(開啓自動編譯的選項)
在設置settings中開啓自動編譯選項
4、Update the value of
組合鍵ctrl+shift+alt+/ 打開如下的選項卡進行設置
進行上面的4個步驟後即可開啓熱部署的設置,當你在啓動項目的情況下修改其他內容,項目會自行的重新啓動,不用再手動的重新啓動,提高了開發的效率。但是在實際的生產環境中一班不會開啓熱部署的。
3、cloud-consumer-order80 微服務消費者訂單Module模塊
還是按照建立新moudle的幾個步驟快速構建
1、建立新的moudle,繼承自父工程,命名爲cloud-consumer-order80
2、改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>
<groupId>com.atguigu.springcloud</groupId>
<artifactId>cloud2020</artifactId>
<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>
3、寫yml
server:
port:80
4、主啓動類
package com.atguigu.spring;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import java.io.Serializable;
@SpringBootApplication
public class OrderMain80 implements Serializable {
public static void main(String[] args) {
SpringApplication.run(OrderMain80.class,args);
}
}
5、業務類
作爲一個消費者模塊,我們不需要再進行數據的操作,因此不需要service和dao。
實體類entities(複製上面模塊的中的實體即可)
controller
1)使用Resttemplate完成客戶端消費者80模塊到微服務提供者8001模塊的調用。
使用Resttemplate對象的話需要將它注入到springboot的容器中。
package com.atguigu.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();
}
}
2)編寫controller類
package com.atguigu.springcloud.controller;
import com.atguigu.springcloud.entities.CommonResult;
import com.atguigu.springcloud.entities.Payment;
import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.http.ResponseEntity;
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;
import javax.annotation.Resource;
import java.net.URI;
import java.util.List;
@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);
}
}
6、測試
3、工程重構
因爲整個項目採用的工程聚合的方式進行構建,我們在完成 了上面的兩個子模塊的建立後,發現兩個項目中有共同的部分,即業務類中的實體entities文件夾是共有的部分,因此我們可以將其提取出來,作爲一個模塊進行構建:
1)建立新的moudle,命名爲cloud-api-commons
2)修改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>springcloud2020</artifactId>
<groupId>com.atguigu.springcloud</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>
3)將同有的部分:實體類進行復制
4)使用mvn命令進行clean、install
5)在訂單80和支付8001分別改造
- 刪除原有的實體類entities文件夾
- 修改各自的pom文件,在pom文件中添加依賴
<dependency>
<groupId>com.atguigu.springcloud</groupId>
<artifactId>cloud-api-common</artifactId>
<version>${project.version}</version>
</dependency>
4、工程樣圖
在完成了父工程和兩個子工程的搭建後就會如下圖的樣圖