• Feign負載均衡：

Feign負載均衡：

Feign服務模組建立介面：

匯入依賴：

<!--feign依賴-->
<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-feign</artifactId>
    <version>1.4.6.RELEASE</version>
</dependency>

介面：

package com.stt.springcloud.service;

import com.stt.springcloud.pojo.Dept;
import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.stereotype.Component;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;

import java.util.List;

@Component
@FeignClient(value = "SPRINGCLOUD-PROVIDER-DEPT")  // 宣告去哪裡取，配置服務名稱
public interface DeptClientService {
	// 以下的三個介面是SPRINGCLOUD-PROVIDER-DEPT這個微服務中的介面，在這裡做宣告
    @GetMapping("/dept/get/{id}")
    public Dept queryById(@PathVariable("id") Long id);

    @GetMapping("/dept/list")
    public List<Dept> queryAll();

    @PostMapping("/dept/add")
    public boolean addDept(Dept dept);
}

 

啟動類：

開啟Feign並掃描介面包，開啟註解掃描

package com.stt;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
import org.springframework.cloud.openfeign.EnableFeignClients;
import org.springframework.context.annotation.ComponentScan;

@SpringBootApplication
@EnableEurekaClient
@EnableFeignClients(basePackages = "com.stt.springcloud")  // 啟動Feign,掃描包
@ComponentScan("com.stt.springcloud")  // 掃描註解
public class FeignDeptConsumer_80 {
    public static void main(String[] args) {
        SpringApplication.run(FeignDeptConsumer_80.class, args);
    }
}
 

建立Feign的服務消費者：

使用面向介面呼叫，取代了原有的RestTemplate，使用服務名呼叫

@RestController
public class DeptConsumerController {

    // 注入Feign中宣告的Service
    @Autowired
    private DeptClientService deptClientService;

    @RequestMapping("/consumer/dept/add")
    public boolean get(Dept dept){
        return deptClientService.addDept(dept);
    }

    @RequestMapping("/consumer/dept/get/{id}")
    public Dept get(@PathVariable("id") Long id){
        return deptClientService.queryById(id);
    }

    @RequestMapping("/consumer/dept/list")
    public List<Dept> get(){
        return deptClientService.queryAll();
    }

}