理论的话不多说,直接进入主题(项目结构安排):
1.springcloud-config:
作用: 作为父级module,子级module继承父级中的依赖
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 https://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>2.2.2.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.shunyi</groupId>
<artifactId>springcloud-config</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>springcloud-config</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
<spring-cloud.version>Hoxton.SR1</spring-cloud.version>
</properties>
<dependencies>
<!-- springCloud客户端的依赖-->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>
<!-- springCloud注册中心的依赖-->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
</dependency>
<!-- springCloud fegin的依赖-->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-openfeign</artifactId>
<version>2.1.2.RELEASE</version>
</dependency>
<!-- springCloud zuul的依赖-->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-zuul</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>${spring-cloud.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
2.springcloud-eureka
作用: springcloud的服务注册中心,服务的注册和发现
启动类加注解:@EnableEurekaServer
pom.xml:(下面的moudle的pom.xml和此一样)
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>com.shunyi</groupId>
<artifactId>springcloud-config</artifactId>
<version>0.0.1-SNAPSHOT</version>
</parent>
<groupId>com.shunyi</groupId>
<artifactId>springcloud-eureka</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>springcloud-eureka</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
</properties>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
<parent></parent>标签内为继承父级module的依赖
application.yml:
server:
port: 1000
eureka:
instance:
hostname: localhost
client:
register-with-eureka: false
fetch-registry: false
service-url:
defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka
spring:
application:
name: springcloud-eureka-service
3.springcloud-login和springcloud-login01
启动类加注解:@EnableEurekaClient
作用:两个登录的微服务,服务提供
springcloud-login的yml:
server:
port: 2000
eureka:
client:
service-url:
defaultZone: http://localhost:1000/eureka/
spring:
application:
name: springcloud-login-service
---------------------------------------------
springcloud-login01的yml:
server:
port: 2001
eureka:
client:
service-url:
defaultZone: http://localhost:1000/eureka/
spring:
application:
name: springcloud-login-service
创建两个class:
Login01Controller:
package com.shunyi.controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
@RequestMapping("user")
public class Login01Controller {
@RequestMapping("/login")
public String login(){
return "我TM是个Login01Controller登录";
}
}
--------------------------------
Login02Controller:
package com.shunyi.controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
@RequestMapping("user")
public class Login02Controller {
@RequestMapping("/login")
public String login(){
return "我TM是个Login02Controller登录";
}
}
此时可以启动服务:先启动springcloud-eureka 再启动 springcloud-login或者springcloud-login01
3.spring-fegin
作用:主要是用于微服务之间的访问,fegin封装了Robbin,自动默认负载均衡轮询方式
启动类注解: @EnableEurekaClient @EnableFeignClients
application.xml:
server:
port: 3000
eureka:
client:
service-url:
defaultZone: http://localhost:1000/eureka/
spring:
application:
name: springcloud-fegin-service
Service接口类:
package com.shunyi.service;
import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.web.bind.annotation.GetMapping;
@FeignClient(value = "springcloud-login-service")
public interface FeginService {
@GetMapping("/user/login")
public String login();
}
controller类:
package com.shunyi.controller;
import com.shunyi.service.FeginService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class FeginController {
@Autowired
private FeginService feginService;
@RequestMapping("/fegin/login")
public String login(){
return feginService.login();
}
}
此时可以启动服务:先启动springcloud-eureka 再启动 springcloud-login和springcloud-login01 再启动spring-fegin
4.springcloud-zuul
作用:用户客户端通过浏览器访问,通过zuul网关来转发到对应的服务,在对应的服务进行负载
启动类注解:@EnableEurekaClient @EnableZuulProxy
application.xml:
server:
port: 4000
eureka:
client:
service-url:
defaultZone: http://localhost:1000/eureka/
spring:
application:
name: springcloud-zuul
zuul:
routes:
login-service: #自定义名称
path: /abcd/** #自定义路径
serviceId: springcloud-login-service #对应服务的 spring.application.name
此时可以启动服务:先启动springcloud-eureka 再启动 springcloud-login和springcloud-login01 再启动spring-fegin 在启动springcloud-zuul