springcloud微服务之负载均衡feign+eurake

Eurake(pom):

   4.0.0
   
      org.springframework.boot
      spring-boot-starter-parent
      2.3.2.RELEASE
       
   
   com.example.eurake
   eurake
   0.0.1-SNAPSHOT
   eurake
   Demo project for Spring Boot

   
      1.8
      Hoxton.SR6
   

   
      
         org.springframework.cloud
         spring-cloud-starter-netflix-eureka-server
      

      
         org.springframework.boot
         spring-boot-starter-test
         test
         
            
               org.junit.vintage
               junit-vintage-engine
            
         
      
   

   
      
         
            org.springframework.cloud
            spring-cloud-dependencies
            ${spring-cloud.version}
            pom
            import
         
      
   

   
      
         
            org.springframework.boot
            spring-boot-maven-plugin
         
      
   

 

@SpringBootApplication
@EnableEurekaServer
public class EurakeApplication {

   public static void main(String[] args) {
      SpringApplication.run(EurakeApplication.class, args);
   }

}

server:
  port: 8761 #eureka


eureka:
  instance:
    hostname: localhost
  client:
    registerWithEureka: false
    fetchRegistry: false
    serviceUrl:
      defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/

 

service-hello服务端

   4.0.0
   
      org.springframework.boot
      spring-boot-starter-parent
      2.3.2.RELEASE
       
   
   com.example.fegin
   service-hello
   0.0.1-SNAPSHOT
   service-hello
   Demo project for Spring Boot

   
      1.8
      Hoxton.SR6
   

   
      
         org.springframework.boot
         spring-boot-starter-web
      
      
         org.springframework.cloud
         spring-cloud-starter-netflix-eureka-client
      

      
         org.springframework.boot
         spring-boot-starter-test
         test
         
            
               org.junit.vintage
               junit-vintage-engine
            
         
      
   

   
      
         
            org.springframework.cloud
            spring-cloud-dependencies
            ${spring-cloud.version}
            pom
            import
         
      
   

   
      
         
            org.springframework.boot
            spring-boot-maven-plugin
         
      
   

 

package com.example.fegin;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

@SpringBootApplication
@EnableEurekaClient
@RestController
public class ServiceHelloApplication {

    public static void main(String[] args) {
        SpringApplication.run(ServiceHelloApplication.class, args);
    }

    @Value("${server.port}")
    String port;

    @RequestMapping("/hello")
    public String home(@RequestParam(value = "name", defaultValue = "toher") String name) {
        return "hi " + name + " ,this is Feign Project , i am from port:" + port;
    }
}

FeignWeb客户端

   4.0.0
   
      org.springframework.boot
      spring-boot-starter-parent
      2.3.2.RELEASE
       
   
   com.study.feign
   feign-web
   0.0.1-SNAPSHOT
   feign-web
   Demo project for Spring Boot

   
      1.8
      Hoxton.SR6
   

   
      
         org.springframework.boot
         spring-boot-starter-web
      
      
         org.springframework.cloud
         spring-cloud-starter-netflix-eureka-client
      
      
         org.springframework.cloud
         spring-cloud-starter-openfeign
      

      
         org.springframework.boot
         spring-boot-starter-test
         test
         
            
               org.junit.vintage
               junit-vintage-engine
            
         
      
   

   
      
         
            org.springframework.cloud
            spring-cloud-dependencies
            ${spring-cloud.version}
            pom
            import
         
      
   

   
      
         
            org.springframework.boot
            spring-boot-maven-plugin
         
      
   

server:
  port: 9001
spring:
  application:
    name: feign-web
  client:
    serviceUrl:
      defaultZone: http://localhost:8761/eureka/

package com.study;

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 FeignWebApplication {

   public static void main(String[] args) {
      SpringApplication.run(FeignWebApplication.class, args);
   }

}

package com.study.service;

import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;

/**
 */

@FeignClient(value = "SERVICE-HELLO")//SERVICE-HELLO就是服务端yml的名称
public interface HelloFeignService {
    @RequestMapping(value = "/hello")
    String helloFeign(@RequestParam(value = "name") String name);//@RequestParam保证接收参数，否则会出现接收为空的问题
}

package com.study.controller;

import com.study.service.HelloFeignService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

/**
 */
@RestController
public class HelloFeignController {

    @Autowired
    private HelloFeignService helloFeignService;

    /**
     * http://192.168.0.103:9001/helloFeign?name=123
     * 访问到SERVICE-HELLO实现服务之间的通信，SERVICE-HELLO可以多启动几个，实现负载的效果
     * @return
     */
    @RequestMapping("/helloFeign")
    public String helloFeign(@RequestParam(value = "name") String name){
        return helloFeignService.helloFeign(name);
    }

    /**
     * http://192.168.0.103:9001/hello?name=123
     * @param name
     * @return
     */
    @RequestMapping("/hello")
    public String hello(@RequestParam(value = "name") String name){
        return "hello Feign";
    }
}