下面有每一步详细步骤: 不懂的可以留言评论。
全部笔记
1、约定 > 配置 > 编码
2、IDEA新建project工作空间
2.1、微服务cloud整体聚合父工程Project
- 父工程步骤
- New Project
- 聚合总父工程名字
- Maven选版本 这里选择自己的就可以了。
- 工程名字
- 字符编码
- 注解生效激活
- java 编译版本 选择自己的就可以了。
- File Type过滤 可有可不有
2.2、父工程POM
个人建议: 除了之前说明要统一的版本 其余的东西可以试一下把版本调到现在用的版本上来,cloud学习思想,其他的还是要跟随主流丫。仅限于个人建议。
代码语言:javascript复制<?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>mscloud03</artifactId>
<version>1.0-SNAPSHOT</version>
<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>
</project>
2.3、Maven工程落地细节复习
2.3.1、Maven中的DependencyManagement和Dependencies
dependencyManagement
Maven 使用dependencyManagement 元素来提供了一种管理依赖版本号的方式。 通常会在一个组织或者项目的最顶层的父POM 中看到dependencyManagement 元素。
使用pom.xml 中的dependencyManagement 元素能让所有在子项目中引用一个依赖而不用显式的列出版本号。 Maven 会沿着父子层次向上走,直到找到一个拥有dependencyManagement 元素的项目,然后它就会使用这个 dependencyManagement 元素中指定的版本号。
这样做的好处就是:如果有多个子项目都引用同一样依赖,则可以避免在每个使用的子项目里都声明一个版本号,这样当想升级或切换到另一个版本时,只需要在顶层父容器里更新,而不需要一个一个子项目的修改 ;另外如果某个子项目需要另外的一个版本,只需要声明version就可。
代码语言:javascript复制dependencyManagement里只是声明依赖,并不实现引入,因此子项目需要显示的声明需要用的依赖。
代码语言:javascript复制如果不在子项目中声明依赖,是不会从父项目中继承下来的;只有在子项目中写了该依赖项,并且没有指定具体版本,
才会从父项目中继承该项,并且version和scope都读取自父pom;
代码语言:javascript复制如果子项目中指定了版本号,那么会使用子项目中指定的jar版本。
2.3.2、maven中跳过单元测试
配置
代码语言:javascript复制<build><!-- maven中跳过单元测试 -->
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<configuration>
<skip>true</skip>
</configuration>
</plugin>
</plugins>
</build>
- IDEA工具支持(推荐)
3.2.4、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
3.3、Rest微服务工程构建
3.3.1、cloud-provider-payment8001 -微服务提供者支付Module模块
建cloud-provider-payment8001
改POM
代码语言:javascript复制<?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>mscloud03</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>
<!--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>
写YML
代码语言:javascript复制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: org.gjt.mm.mysql.Driver # mysql驱动包 com.mysql.jdbc.Driver
url: jdbc:mysql://localhost:3306/db2019?useUnicode=true&characterEncoding=utf-8&useSSL=false
username: root
password: 123456
mybatis:
mapperLocations: classpath:mapper/*.xml
type-aliases-package: com.atguigu.springcloud.entities # 所有Entity别名类所在包
业务类
建表SQL
代码语言:javascript复制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
entities
主实体Payment
代码语言:javascript复制import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import java.io.Serializable;
/**
* @auther zzyy
* @create 2020-01-27 20:01
*/
@Data
@AllArgsConstructor
@NoArgsConstructor
public class Payment implements Serializable
{
private Long id;
private String serial;
}
Json封装体CommonResult
代码语言:javascript复制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);
}
}
dao
接口PaymentDao 用注解就可以了。
代码语言:javascript复制import com.atguigu.springcloud.entities.Payment;
import org.apache.ibatis.annotations.Mapper;
/**
* @Author: crush
* @Date: 2021-05-19 20:44
* version 1.0
*/
@Mapper
public interface PaymentDao {
@Insert("insert into payment(serial) values(#{serial})")
int create(Payment payment);
@Select("select * from payment where id=#{id}")
Payment getPaymentById(@Param("id") Long id);
}
service
接口PaymentService
代码语言:javascript复制public interface PaymentService
{
public int create(Payment payment);
public Payment getPaymentById(@Param("id") Long id);
}
实现类
代码语言:javascript复制@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);
}
}
controller
代码语言:javascript复制@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);
}
}
}
测试
- http://localhost:8001/payment/get/31
- postman模拟post
- 运行
- 通过修改idea的workspace.xml的方式来快速打开Run Dashboard窗口 (这个看不到可以搜一下 应该是在view 那个菜单中 )
- 开启Run DashBoard
- 部分同学可能由于idea版本不同,需要关闭重启
小总结
3.3.2、热部署Devtools
Adding devtools to your project
代码语言:javascript复制<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
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
代码语言:javascript复制<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>
Enabling automatic build
Update the value of
重启IDEA
3.3.3、cloud-consumer-order80 —微服务消费者订单Module模块
建cloud-consumer-order80
改POM
代码语言:javascript复制<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>
写YML
代码语言:javascript复制server:
port: 80 #服务端口
spring:
application:
name: cloud-order-service #服务名
datasource:
type: com.alibaba.druid.pool.DruidDataSource #当前数据源操作类型
driver-class-name: com.mysql.jdbc.Driver #数据库驱动包
url: jdbc:mysql://localhost:3306/springcloud_2021?characterEncoding=utf8&useSSL=false&serverTimezone=UTC&rewriteBatchedStatements=true
username: root
password: 123456
mybatis:
mapper-locations:
classpath: mapper/*.xml
type-aliases-package:
com:
crush:
springcloud: entities #所有entity别名所在包
主启动
代码语言:javascript复制@SpringBootApplication
public class MainApp80
{
public static void main(String[] args)
{
SpringApplication.run(MainApp80.class,args);
}
}
业务类
entities 主实体Payment Json封装体CommonResult 和服务提供者中都是一样的。
首说RestTemplate
- 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
- 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。
config配置类 ApplicationContextConfig
代码语言:javascript复制@Configuration
public class ApplicationContextConfig
{
@Bean
public RestTemplate restTemplate()
{
return new RestTemplate();
}
}
controller
代码语言:javascript复制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;
@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(@RequestBody 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);
}
}
测试
http://localhost/consumer/payment/get/1
http://localhost/consumer/payment/create?serial=aaaaa1
3.3.4、工程重构
观察问题 系统中有重复部分,重构
新建 cloud-api-commons
POM
代码语言:javascript复制<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>
entities
Payment实体
代码语言:javascript复制@Data
@AllArgsConstructor
@NoArgsConstructor
public class Payment implements Serializable
{
private Long id;
private String serial;
}
CommonResult通用封装类
代码语言:javascript复制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;
}
}
maven命令clean install
订单80和支付8001分别改造
删除各自的原先有过的entities文件夹
各自粘贴POM内容
80 8001 都是一样
代码语言:javascript复制<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>${project.version}</version>
</dependency>
3.4、目前工程样式图
自言自语
如果在学习过程中,有什么错误,大家也可以一起交流。 有什么不懂,也可以留言评论,欢迎来访。