第SpringCloudOpenFeign超詳細(xì)講解模板化遠(yuǎn)程通信的實(shí)現(xiàn)目錄1.openFeign實(shí)現(xiàn)1.1pom依賴1.2yaml配置1.3客戶端調(diào)用代碼1.4.服務(wù)端暴露接口1.5.測試日志

1.openFeign實(shí)現(xiàn)

基于spring-boot-starter-parent2.6.8，spring-cloud-dependencies2025.0.3，一個(gè)order服務(wù)一個(gè)user服務(wù)

1.1pom依賴

!--nacos服務(wù)注冊與發(fā)現(xiàn)--

dependency

groupIdcom.alibaba.cloud/groupId

artifactIdspring-cloud-starter-alibaba-nacos-discovery/artifactId

version20/version

/dependency

!--遠(yuǎn)程服務(wù)調(diào)用--

dependency

groupIdorg.springframework.cloud/groupId

artifactIdspring-cloud-loadbalancer/artifactId

/dependency

!--服務(wù)調(diào)用feign--

dependency

groupIdorg.springframework.cloud/groupId

artifactIdspring-cloud-starter-openfeign/artifactId

/dependency

1.2yaml配置

order調(diào)用端，配置的超時(shí)設(shè)置注釋掉了只為記錄

spring:

application:

name:orderservice

cloud:

inetutils:

preferred-networks:192.168.0

nacos:

discovery:

server-addr:21:8848

user服務(wù)僅需要注冊

spring:

application:

name:userservice

cloud:

inetutils:

preferred-networks:192.168.0

nacos:

discovery:

server-addr:21:8848

遠(yuǎn)程調(diào)用依賴于注冊中心，這里用的是nacos，其他的eureka也可以的

1.3客戶端調(diào)用代碼

啟動類上添加@EnableFeignClients注解api接口，可以單獨(dú)放在api包

@FeignClient(value="userservice")

//沒有注冊中心的服務(wù)調(diào)用使用testFeign/隨便寫

//@FeignClient(value="testFeign",url="99:7540")

publicinterfaceUserService{

//默認(rèn)是@RequestBody注解參數(shù)

//如果使用其他注解一定要帶上value否者會報(bào)錯(cuò)RequestParam.value()wasemptyonparameter1

@GetMapping("/getTime/{uuid}")

StringgetTime(@PathVariable("uuid")Stringuuid,@RequestParam("name")Stringname);

@PostMapping("/postTime")

MapString,ObjectgetTime(@RequestBodyMapString,Objectparams);

}

客戶端代碼

@Resource

UserServiceuserService;

@GetMapping("/test")

publicStringtest()throwsException{

("openFeign--start");

MapString,Objecttime=userService.getTime(resMap);

("openFeign--{}",time);

returntemplate+":"+time;

}

1.4.服務(wù)端暴露接口

@PostMapping("/postTime")

publicMapString,ObjectgetTime(@RequestBodyMapString,Objectparams){

params.put("time",newDate().getTime());

returnparams;

1.5.測試日志

c.e.order.controller.OrderContro