使用Idea简单快速搭建springcloud项目的图文教程
作者:Firm陈
前言:
开发工具:IntelliJ IDEA 2020版 (Ultimate Edition)
框架:spring boot 、spring cloud
搭建一套spring cloud微服务系统,实现服务之间的调用。
需要搭建一个父工程springcloud-test,一个服务注册中心eureka-server,两个微服务cloud-client,cloud-provider。
两个微服务均注册到服务注册中心。
一.搭建父项目
2.
3.
(1)删掉src目录
(2)定义pom.xml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> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.4.1</version> <relativePath/> <!-- lookup parent from repository --> </parent> <groupId>com.chen.test</groupId> <artifactId>springcloud-test</artifactId> <version>1.0-SNAPSHOT</version> <packaging>pom</packaging> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <java.version>1.8</java.version> </properties> </project>
二.搭建eureka-server注册中心
1.
2.
3.
4.
5.
6.
(1)定义pom.xml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 https://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <!--引入父工程依赖--> <parent> <groupId>com.chen.test</groupId> <artifactId>springcloud-test</artifactId> <version>1.0-SNAPSHOT</version> </parent> <groupId>com.chen.test</groupId> <artifactId>eureka-server</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>eureka-server</name> <description>Demo project for Spring Boot</description> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <java.version>1.8</java.version> <spring-cloud.version>2020.0.0</spring-cloud.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> </dependencies> <dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-dependencies</artifactId> <version>${spring-cloud.version}</version> <type>pom</type> <scope>import</scope> </dependency> </dependencies> </dependencyManagement> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> <repositories> <repository> <id>spring-milestones</id> <name>Spring Milestones</name> <url>https://repo.spring.io/milestone</url> </repository> </repositories> </project>
(2)删掉test文件夹(自己设置,可有可无)
(3)启动加注解@EnableEurekaServer(开启eureka服务)
package com.chen.test.eurekaserver; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer; @SpringBootApplication @EnableEurekaServer public class EurekaServerApplication { public static void main(String[] args) { SpringApplication.run(EurekaServerApplication.class, args); } }
(4)定义配置文件
配置文件改为application.yml(可有可无,看自己喜好)
server: port: 8080 spring: application: #应用名称(在注册中显示的) name: eureka-server eureka: client: #此客户端是否获取eureka服务器注册表上的注册信息,默认为true fetch-registry: false #实例是否在eureka服务器上注册自己的信息以供其他服务发现,默认为true,即自己注册自己。 register-with-eureka: true #与Eureka注册服务中心的通信zone和url地址 serviceUrl: #http://localhost:8080/eureka/eureka defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka #服务注册中心实例的主机名 instance: hostname: 127.0.0.1 prefer-ip-address: true instance-id: 127.0.0.1:8080 server: #设为false,关闭自我保护,即Eureka server在云心光器件会去统计心跳失败比例在15分钟之内是否低于85%,如果低于85%,EurekaServer #会将这些事例保护起来,让这些事例不会过期,但是在保护器内如果刚哈这个服务提供者非正常下线了,此时服务消费者会拿到一个无效的服务 #实例,此时调用会失败,对于这个问题需要服务消费者端有一些容错机制,如重试、断路器等; enable-self-preservation: false #扫描失效服务的间隔时间(单位是毫秒,摩恩是60*1000),即60s eviction-interval-timer-in-ms: 10000
(5)测试
三.搭建提供者服务
1.
2.
3.
4.
5.
6.
(1)定义pom.xml文件
<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <!--引入父工程依赖--> <parent> <groupId>com.chen.test</groupId> <artifactId>springcloud-test</artifactId> <version>1.0-SNAPSHOT</version> </parent> <groupId>com.chen.test</groupId> <artifactId>cloud-provider</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>cloud-provider</name> <description>Demo project for Spring Boot</description> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <java.version>1.8</java.version> <spring-cloud.version>2020.0.0</spring-cloud.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> </dependencies> <dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-dependencies</artifactId> <version>${spring-cloud.version}</version> <type>pom</type> <scope>import</scope> </dependency> </dependencies> </dependencyManagement> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> <repositories> <repository> <id>spring-milestones</id> <name>Spring Milestones</name> <url>https://repo.spring.io/milestone</url> </repository> </repositories> </project>
(2)删除test文件加(可有可无)
(3)修改配置文件为application.yml(可有可无)
spring: application: name: cloud-provider server: port: 8081 eureka: client: #此客户端是否获取eureka服务器注册表上的注册信息,默认为true fetch-registry: false #实例是否在eureka服务器上注册自己的信息以供其他服务发现,默认为true,即自己注册自己。 register-with-eureka: true service-url: #defaultZone 这个是不会提示的,此处需要自己写 #实际上属性应该是service-url,这个属性是个map(key-value)格式;当key是defaultZone的时候才能被解析;所以这里没有提示, #但是自己还需要写一个defaultZone; defaultZone: http://localhost:8080/eureka #服务注册中心实例的主机名 instance: hostname: 127.0.0.1 prefer-ip-address: true instance-id: 127.0.0.1:8081
(4)启动类加注解@EnableEurekaClient
package com.chen.test.cloudprovider; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.cloud.netflix.eureka.EnableEurekaClient; @SpringBootApplication @EnableEurekaClient public class CloudProviderApplication { public static void main(String[] args) { SpringApplication.run(CloudProviderApplication.class, args); } }
(5)测试
四.搭建消费者服务
1.
2.
3.
4.
5.
(1)定义pom.xml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 https://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <!--引入父工程依赖--> <parent> <groupId>com.chen.test</groupId> <artifactId>springcloud-test</artifactId> <version>1.0-SNAPSHOT</version> </parent> <groupId>com.chen.demo</groupId> <artifactId>cloud-client</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>cloud-client</name> <description>Demo project for Spring Boot</description> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <java.version>1.8</java.version> <spring-cloud.version>2020.0.0</spring-cloud.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-openfeign</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> </dependencies> <dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-dependencies</artifactId> <version>${spring-cloud.version}</version> <type>pom</type> <scope>import</scope> </dependency> </dependencies> </dependencyManagement> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> <repositories> <repository> <id>spring-milestones</id> <name>Spring Milestones</name> <url>https://repo.spring.io/milestone</url> </repository> </repositories> </project>
(2)删除test文件夹(可有可无)
(3)修改配置文件为application.yml(可有可无)
server: #定义端口号 port: 8082 spring: application: #定义应用名称,即服务名称 name: cloud-client eureka: client: service-url: defaultZone: http://localhost:8080/eureka #服务注册中心实例的主机名 instance: hostname: 127.0.0.1 prefer-ip-address: true instance-id: 127.0.0.1:8082
(4)启动类加注解@EnableEurekaClient
package com.chen.demo.cloudclient; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.cloud.netflix.eureka.EnableEurekaClient; @SpringBootApplication @EnableEurekaClient public class CloudClientApplication { public static void main(String[] args) { SpringApplication.run(CloudClientApplication.class, args); } }
(5)测试
(6)在父pom中加上
<modules> <module>eureka-server</module> <module>cloud-provider</module> <module>cloud-client</module> </modules>
五.实现服务之间的调用
1.在cloud-provider中创建controller包和service包
package com.chen.test.cloudprovider.controller; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; import com.chen.test.cloudprovider.service.HelloService; @RestController @RequestMapping("/hello") public class HelloController { @Autowired private HelloService helloService; @GetMapping("/getHello") public String getHello(){ return helloService.getHello(); } }
package com.chen.test.cloudprovider.service; public interface HelloService { String getHello(); }
package com.chen.test.cloudprovider.service.impl; import com.chen.test.cloudprovider.service.HelloService; import org.springframework.stereotype.Service; @Service public class HelloServiceImpl implements HelloService { @Override public String getHello() { return "你好兄弟"; } }
(2)测试
(3)在cloud-client中创建controller包和service包
package com.chen.demo.cloudclient.controller; import com.chen.demo.cloudclient.service.HelloService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; import javax.annotation.Resource; @RestController @RequestMapping("/Hello") public class HelloClient { @Autowired private HelloService helloService; @GetMapping("/getClient") public String getClient(){ return helloService.getProduct(); } }
package com.chen.demo.cloudclient.service; import org.springframework.cloud.openfeign.FeignClient; import org.springframework.stereotype.Component; import org.springframework.web.bind.annotation.RequestMapping; //name 为product项目中application.yml配置文件中的application.name; //path 为product项目中application.yml配置文件中的context.path; @FeignClient(name = "cloud-provider",path ="/hello" ) //@Componet注解最好加上,不加idea会显示有错误,但是不影响系统运行; @Component public interface HelloService { @RequestMapping(value = "getHello") String getProduct(); }
特别注意
在启动类加上注解@EnableFeignClients
package com.chen.demo.cloudclient; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.cloud.netflix.eureka.EnableEurekaClient; import org.springframework.cloud.openfeign.EnableFeignClients; @SpringBootApplication @EnableEurekaClient @EnableFeignClients public class CloudClientApplication { public static void main(String[] args) { SpringApplication.run(CloudClientApplication.class, args); } }
(4)测试
到此这篇关于使用Idea简单快速搭建springcloud项目的图文教程的文章就介绍到这了,更多相关idea搭建springcloud项目内容请搜索脚本之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持脚本之家!