SpringCloud 中Eureka+Fegin+Zuul的整合使用

最新推荐文章于 2024-12-23 22:30:26 发布

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最新推荐文章于 2024-12-23 22:30:26 发布

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文章标签： Springcloud eureka zuul fegin

本文链接：https://blog.youkuaiyun.com/Mr_xiayijie/article/details/103685888

本文详细介绍了Spring Cloud微服务架构的搭建过程，包括服务注册中心Eureka、微服务实例、Feign客户端负载均衡、Zuul网关等核心组件的配置与使用。

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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