SpringCloud 是微服务一站式服务解决方案,微服务全家桶。它是微服务开发的主流技术栈。它采用了名称,而非数字版本号。
SpringCloud 和 SpringCloud Alibaba 目前是最主流的微服务框架组合。
选用 SpringBoot 和 SpringCloud 版本有约束,不按照它的约束会有冲突。
查看版本对ces应关系:https://spring.io/projects/spring-cloud#overview
cloud | Hoxton.SR1 |
boot | 2.2.2.RELEASE |
cloud alibaba | 2.1.0.RELEASE |
Java | Java8 |
Maven | 3.5及以上 |
Mysql | 5.7及以上 |
题外话:当前boot版已经到2.7.3为最新,为什么选2.2.2?
现在(2020年):
https://cloud.spring.io/spring-cloud-static/Hoxton.SR1/reference/htmlsingle/
Spring Cloud中文文档:https://www.bookstack.cn/read/spring-cloud-docs/docs-index.md
约定 > 配置 > 编码
• 1.3.0 mybatis.spring.boot.version 的版本太低,无法使用注解@Mapper,@Parm
<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>4.0.0modelVersion>
<groupId>springcloudgroupId>
<artifactId>cloud2020artifactId>
<version>1.0-SNAPSHOTversion>
<packaging>pompackaging>
<properties>
<project.build.sourceEncoding>UTF-8project.build.sourceEncoding>
<maven.compiler.source>1.8maven.compiler.source>
<maven.compiler.target>1.8maven.compiler.target>
<junit.version>4.12junit.version>
<log4j.version>1.2.17log4j.version>
<lombok.version>1.16.18lombok.version>
<mysql.version>5.1.47mysql.version>
<druid.version>1.1.16druid.version>
<mybatis.spring.boot.version>1.3.0mybatis.spring.boot.version>
properties>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.apache.maven.pluginsgroupId>
<artifactId>maven-project-info-reports-pluginartifactId>
<version>3.0.0version>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-dependenciesartifactId>
<version>2.2.2.RELEASEversion>
<type>pomtype>
<scope>importscope>
dependency>
<dependency>
<groupId>org.springframework.cloudgroupId>
<artifactId>spring-cloud-dependenciesartifactId>
<version>Hoxton.SR1version>
<type>pomtype>
<scope>importscope>
dependency>
<dependency>
<groupId>com.alibaba.cloudgroupId>
<artifactId>spring-cloud-alibaba-dependenciesartifactId>
<version>2.1.0.RELEASEversion>
<type>pomtype>
<scope>importscope>
dependency>
<dependency>
<groupId>mysqlgroupId>
<artifactId>mysql-connector-javaartifactId>
<version>${mysql.version}version>
<scope>runtimescope>
dependency>
<dependency>
<groupId>com.alibabagroupId>
<artifactId>druidartifactId>
<version>${druid.version}version>
dependency>
<dependency>
<groupId>org.mybatis.spring.bootgroupId>
<artifactId>mybatis-spring-boot-starterartifactId>
<version>${mybatis.spring.boot.version}version>
dependency>
<dependency>
<groupId>junitgroupId>
<artifactId>junitartifactId>
<version>${junit.version}version>
dependency>
<dependency>
<groupId>log4jgroupId>
<artifactId>log4jartifactId>
<version>${log4j.version}version>
dependency>
dependencies>
dependencyManagement>
<build>
<plugins>
<plugin>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-maven-pluginartifactId>
<configuration>
<fork>truefork>
<addResources>trueaddResources>
configuration>
plugin>
plugins>
build>
project>
1、支付Module模块8001
新建模块cloud-provider-payment8001
pom.xml
<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>cloud2020artifactId>
<groupId>springcloudgroupId>
<version>1.0-SNAPSHOTversion>
parent>
<modelVersion>4.0.0modelVersion>
<artifactId>cloud-provider-payment8001artifactId>
<dependencies>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-webartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-actuatorartifactId>
dependency>
<dependency>
<groupId>org.mybatis.spring.bootgroupId>
<artifactId>mybatis-spring-boot-starterartifactId>
dependency>
<dependency>
<groupId>com.alibabagroupId>
<artifactId>druid-spring-boot-starterartifactId>
<version>1.1.10version>
dependency>
<dependency>
<groupId>mysqlgroupId>
<artifactId>mysql-connector-javaartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-jdbcartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-devtoolsartifactId>
<scope>runtimescope>
<optional>trueoptional>
dependency>
<dependency>
<groupId>org.projectlombokgroupId>
<artifactId>lombokartifactId>
<optional>trueoptional>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-testartifactId>
<scope>testscope>
dependency>
dependencies>
project>
application.yml
server:
port: 8001
spring:
application:
name: cloud-payment-service # 项目名,也是注册的名字
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/db2019?useUnicode=true&characterEncoding=utf-8&useSSL=false&serverTimezone=UTC
username: root
password: 12345
mybatis:
mapper-locations: classpath:mapper/*.xml
# 所有Entity 别名类所在包
type-aliases-package: com.atguigu.springcloud.entities
主启动类
@SpringBootApplication
public class PaymentMain8001 {
public static void main(String[] args) {
SpringApplication.run(PaymentMain8001.class,args);
}
}
建表SQL
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
select * from payment;
实体类
@Data
@AllArgsConstructor
@NoArgsConstructor
public class Payment implements Serializable {
private long id; //数据库是bigint
private String serial;
}
返回给前端的通用json数据串
@Data
@NoArgsConstructor
@AllArgsConstructor
public class CommonResult<T> {
private Integer code;
private String message;
private T data;
public CommonResult(Integer id,String message){
this(id,message,null);
}
}
dao
@Mapper
public interface PaymentDao {
public int create(Payment payment);
public Payment getPaymentById(@Param("id") Long id);
}
resource下创建mapper文件夹,新建mapper.xml。在yml里有所有entity别名类所在包,所有payment不用写全类名
DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.atguigu.springcloud.springcloud.dao.PaymentDao">
<resultMap id="BaseResultMap" type="Payment">
<id column="id" property="id" jdbcType="BIGINT"/>
<id 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>
service
public interface PaymentService {
public int create(Payment payment);
public Payment getPaymentById(@Param("id") Long id);
}
serviceImpl
@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
@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+"\t"+"oo哈哈");
if (payment!=null){
return new CommonResult(200,"查询成功",payment);
}else {
return new CommonResult(444,"查询失败",null);
}
}
}
使用Postman测试:http://localhost:8001/payment/get/31
返回JSON数据:{“code”:200,“message”:“查询成功,serverPort:8001”,“data”:{“id”:31,“serial”:“尚硅谷”}}
效果:代码改动后自动生效,不用重新运行; 重点:热部署只允许在开发阶段使用
第一步:
往springcloud的微服务模块的POM添加【引入jar包】:上面也已经添加好了.
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-devtoolsartifactId>
<scope>runtimescope>
<optional>trueoptional>
dependency>
第二步:
往springcloud的父工程的POM添加【添加插件】:上面也已经添加好了.
<build>
<plugins>
<plugin>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-maven-pluginartifactId>
<version>2.2.2.RELEASEversion>
<configuration>
<fork>truefork>
<addResources>trueaddResources>
configuration>
plugin>
plugins>
build>
第三步:
往idea的settings里面在File | Settings | Build, Execution, Deployment | Compiler
勾选A、D、B、C
第四步:
开启idea热部署快捷键 Ctrl+shift+Alt+/ 选第一个 1 Registry… 进入,
勾选
Compiler.automake.allow.when.app.running 和 actionSystem.assertFocusAccessFromEdt
第五步
重启Idea
新建模块cloud-consumer-order80
消费者现在只模拟调用提供者的Controller方法,没有持久层配置,只有Controller和实体类
当然也要配置主启动类和启动端口
pom.xml
<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>cloud2020artifactId>
<groupId>springcloudgroupId>
<version>1.0-SNAPSHOTversion>
parent>
<modelVersion>4.0.0modelVersion>
<artifactId>cloud-consumer-order80artifactId>
<dependencies>
<dependency>
<groupId>org.springframework.cloudgroupId>
<artifactId>spring-cloud-starter-zipkinartifactId>
dependency>
<dependency>
<groupId>org.springframework.cloudgroupId>
<artifactId>spring-cloud-starter-netflix-eureka-clientartifactId>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-webartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-actuatorartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-devtoolsartifactId>
<scope>runtimescope>
<optional>trueoptional>
dependency>
<dependency>
<groupId>org.projectlombokgroupId>
<artifactId>lombokartifactId>
<optional>trueoptional>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-testartifactId>
<scope>testscope>
dependency>
dependencies>
project>
application.yml
server:
port: 80
主启动类
@SpringBootApplication
public class OrderMain80 {
public static void main(String[] args) {
SpringApplication.run(OrderMain80.class,args);
}
}
实体类
@Data
@AllArgsConstructor
@NoArgsConstructor
public class Payment implements Serializable {
private long id;
private String serial;
}
返回给前端的通用json数据串
@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);
}
}
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
@Configuration
public class ApplicationContextConfig {
public RestTemplate getRestTemplate(){
return new RestTemplate();
}
}
controller
@Slf4j
@RestController
public class OrderController {
//远程调用的地址
public static final String PAYMENT_URL="http://localhost:8001";
@Resource
private RestTemplate restTemplate;
@PostMapping("/consumer/payment/create")
public CommonResult<Payment> create(@RequestBody Payment payment){
return restTemplate.postForObject(PAYMENT_URL+"/payment/create",//请求地址
payment,//请求参数
CommonResult.class);//返回类型
}
@GetMapping("/consumer/payment/get/{id}")
public CommonResult<Payment> getPaymentById(@PathVariable("id")Long id){
return restTemplate.getForObject(PAYMENT_URL+"/payment/get/"+id,//请求地址
CommonResult.class);//返回类型
}
}
使用Postman测试:http://localhost/consumer/payment/get/31
返回JSON数据:{“code”:200,“message”:“查询成功,serverPort:8001”,“data”:{“id”:31,“serial”:“尚硅谷”}}
系统中有重复部分
新建模块cloud-api-commons
pom.xml
<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>cloud2020artifactId>
<groupId>springcloudgroupId>
<version>1.0-SNAPSHOTversion>
parent>
<modelVersion>4.0.0modelVersion>
<artifactId>cloud-api-commonsartifactId>
<dependencies>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-devtoolsartifactId>
<scope>runtimescope>
<optional>trueoptional>
dependency>
<dependency>
<groupId>org.projectlombokgroupId>
<artifactId>lombokartifactId>
<optional>trueoptional>
dependency>
<dependency>
<groupId>cn.hutoolgroupId>
<artifactId>hutool-allartifactId>
<version>5.1.0version>
dependency>
dependencies>
project>
实体类
@Data
@AllArgsConstructor
@NoArgsConstructor
public class Payment implements Serializable {
private long id;
private String serial;
}
CommonResult通用封装类
@Data
@AllArgsConstructor
@NoArgsConstructor
public class Payment implements Serializable {
private long id;
private String serial;
}
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,分别粘贴
<dependency>
<groupId>springcloudgroupId>
<artifactId>cloud-api-commonsartifactId>
<version>${project.version}version>
dependency>