Spring Cloud的介绍及项目搭建
SpringBoot与SpringCloud的关系与区别
1,SpringBoot ：是一个快速开发框架，通过用maven依赖的继承方式，帮我们快速整合第三方框架，完全采用注解化（使用注解方式启动SpringMVC），简化XML配置，内置HTTP服务器（Tomcat，Jetty），最终以Java应用程序进行执行。
简化了spring的程序的搭建和开发。
2,SpringCloud：是一套目前完整的微服务框架，它是是一系列框架的有序集合。通过SpringBoot风格进行再封装屏蔽掉了复杂的配置和实现原理，最终给开发者留出了一套简单易懂、易部署和易维护的分布式系统开发工具包。它利用Spring Boot的开发便利性巧妙地简化了分布式系统基础设施的开发，如服务发现注册、配置中心、消息总线、负载均衡、断路器、数据监控等，都可以用SpringBoot的开发风格做到一键启动和部署。
通过上面的描述可以总结出：
（1） maven是springboot的基础，springboot项目本身就是maven项目。在maven项目中使用springboot的多个starter加几个约定，就能成为springboot项目了。
（2）springboot是springcloud的基础，springcloud本身是springboot项目。
（3）关系：maven->springboot->springcloud
maven是springboot的基础，springboot是springcloud的基础，maven不依赖于springboot，springboot不依赖与springcloud。
SpringCloud 包含哪些？
服务注册与发现 zookeeper nacos consul
服务调用 openfeign
服务熔断
负载均衡
服务降级 hystrix stentienl
服务消息队列
配置中心管理 nacos
服务网关 gateway
服务监控
全链路追踪
自动化构建部署
手动搭建一个SpringCloud项目
1，建父工程
2,删除src 只保留pom文件
3，配置pom.xml
<?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.demo</groupId>
<artifactId>springcloud2022</artifactId>
<packaging>pom</packaging>
<version>1.0-SNAPSHOT</version>
<modules>
<module>provider-payment</module>
<module>consumer-order</module>
<module>commons</module>
</modules>
<!-- 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>
<lombok.version>1.16.18</lombok.version>
<mysql.version>5.1.47</mysql.version>
<druid.version>1.1.16</druid.version>
<druid.spring.boot.starter.version>1.1.10</druid.spring.boot.starter.version>
<mybatis.plus.boot.starter.version>3.3.2</mybatis.plus.boot.starter.version>
</properties>
<!-- 1、只是声明依赖，并不实际引入，子项目按需声明使用的依赖 -->
<!-- 2、子项目可以继承父项目的 version 和 scope -->
<!-- 3、子项目若指定了 version 和 scope，以子项目为准 -->
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-dependencies</artifactId>
<version>2.3.2.RELEASE</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>Hoxton.SR7</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<dependency>
<groupId>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-alibaba-dependencies</artifactId>
<version>2.2.1.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>com.alibaba</groupId>
<artifactId>druid-spring-boot-starter</artifactId>
<version>${druid.spring.boot.starter.version}</version>
</dependency>
<dependency>
<groupId>com.baomidou</groupId>
<artifactId>mybatis-plus-boot-starter</artifactId>
<version>${mybatis.plus.boot.starter.version}</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${junit.version}</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>${lombok.version}</version>
<optional>true</optional>
</dependency>
</dependencies>
</dependencyManagement>
</project>
4，建子工程
5，配置子工程的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>springcloud2022</artifactId>
<groupId>com.demo</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>provider-payment</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>com.baomidou</groupId>
<artifactId>mybatis-plus-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid-spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</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>com.demo</groupId>
<artifactId>commons</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency>
</dependencies>
</project>
6，建基础公用模块工程
7.导入基础模块的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>springcloud2022</artifactId>
<groupId>com.demo</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>commons</artifactId>
<dependencies>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
</dependencies>
</project>
8，生产者-消费模块
基础类
controller 类
package com.demo.provider.payment.controller;
import com.demo.entity.CommonResult;
import com.demo.entity.Payment;
import com.demo.provider.payment.service.PaymentService;
import org.springframework.web.bind.annotation.*;
import javax.annotation.Resource;
@RestController
@RequestMapping("payment")
public class PaymentController {
@Resource
private PaymentService paymentService;
@GetMapping("get/{id}")
public CommonResult<Payment> selectOne(@PathVariable("id") String id) {
Payment payment = this.paymentService.listById(id);
return new CommonResult<Payment>(200, "select success", payment);
}
@PostMapping("create")
public CommonResult<Integer> create(@RequestBody Payment payment) {
Integer insert = this.paymentService.create(payment);
return new CommonResult<>(200, "insert success", insert);
}
}
service 接口
package com.demo.provider.payment.service;
import com.baomidou.mybatisplus.extension.service.IService;
import com.demo.entity.Payment;
public interface PaymentService extends IService<Payment> {
Payment listById(String id);
Integer create(Payment payment);
}
service impl 类
package com.demo.provider.payment.service.impl;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.demo.entity.Payment;
import com.demo.provider.payment.dao.PaymentDao;
import com.demo.provider.payment.service.PaymentService;
import org.springframework.stereotype.Service;
import javax.annotation.Resource;
@Service("paymentService")
public class PaymentServiceImpl extends ServiceImpl<PaymentDao,Payment> implements PaymentService {
@Resource
private PaymentDao paymentDao;
@Override
public Payment listById(String id) {
return paymentDao.selectById(id);
}
@Override
public Integer create(Payment payment) {
return paymentDao.insert(payment);
}
}
dao 接口
package com.demo.provider.payment.dao;
import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.demo.entity.Payment;
import org.apache.ibatis.annotations.Mapper;
@Mapper
public interface PaymentDao extends BaseMapper<Payment> {
}
启动类
package com.demo.provider.payment;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class ProviderPaymentApplication {
public static void main(String[] args) {
SpringApplication.run(ProviderPaymentApplication.class,args);
}
}
配置文件
server:
port: 8011
spring:
application:
name: provider-payment
#mysql 5用的驱动是com.mysql.jdbc.Driver
#mysql 6用的驱动是com.mysql.cj.jdbc.Driver
datasource:
driver-class-name: com.mysql.jdbc.Driver
url: jdbc:mysql://58.48.40.198:14306/test?autoRreconnect=true&useSSL=false&useUnicode=true&characterEncoding=utf-8&allowMultiQueries=true&serverTimezone=GMT%2b8
username: root
password: bcle98i3nf
9，消费者-订单模块
基础类
RestTemplateConfig 类
package com.demo.consumerorder.config;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.client.RestTemplate;
@Configuration
public class RestTemplateConfig {
@Bean
public RestTemplate getRestTemplate() {
return new RestTemplate();
}
}
controller 类
package com.demo.consumerorder.controller;
import com.demo.entity.CommonResult;
import com.demo.entity.Payment;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.client.RestTemplate;
import javax.annotation.Resource;
@RestController
@RequestMapping("consumer")
public class OrderController {
public static final String PAYMENT_URL = "http://localhost:8011";
@Resource
private RestTemplate restTemplate;
@PostMapping("/create")
public CommonResult<Payment> create(@RequestBody Payment payment) {
return restTemplate.postForObject(PAYMENT_URL + "/payment/create", payment, CommonResult.class);
}
@GetMapping("/get/{id}")
public CommonResult<Payment> getPayment(@PathVariable("id") Long id) {
return restTemplate.getForObject(PAYMENT_URL + "/payment/get/" + id, CommonResult.class);
}
}
启动类
package com.demo.consumerorder;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class ConsumerOrderApplication {
public static void main(String[] args) {
SpringApplication.run(ConsumerOrderApplication.class,args);
}
}
配置类
server:
port: 8012
spring:
application:
name: consumer-order
#mysql 5用的驱动是com.mysql.jdbc.Driver
#mysql 6用的驱动是com.mysql.cj.jdbc.Driver
datasource:
driver-class-name: com.mysql.jdbc.Driver
url: jdbc:mysql://58.48.40.198:14306/test?autoRreconnect=true&useSSL=false&useUnicode=true&characterEncoding=utf-8&allowMultiQueries=true&serverTimezone=GMT%2b8
username: root
password: bcle98i3nf
运行结果：
