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写一个微服务接口

Version: 2.5+

本示例以服务jeecg-system调用服务jeecg-demo为例讲解feign调用

一. jeecg-demo中编写服务接口​

编写接口

public interface JeecgDemoService {
    Result<String> getMessage(String name);
}

编写实现类

@Service
public class JeecgDemoServiceImpl implements JeecgDemoService {
    @Override
    public Result<String> getMessage(String name) {
        return Result.OK("Hello" + name);
    }
}

编写服务接口

@RestController
@RequestMapping("/test")
public class JeecgDemoProvider {

    @Resource
    private JeecgDemoService jeecgDemoService;

    @GetMapping("/getMessage")
    public Result<String> getMessage(@RequestParam String name) {
        return jeecgDemoService.getMessage(name);
    }
}

二. jeecg-system中编写feign客户端接口​

  1. 启动类加上 @EnableFeignClients 注解。

  1. 编写feign客户端
//jeecg-boot-module-demo模块的服务名是 jeecg-demo
@FeignClient(value = CloudConstant.SERVER_NAME_JEECGDEMO, configuration = FeignConfig.class,fallbackFactory = JeecgTestClientFactory.class)
@Component
public interface JeecgTestClient {
    @GetMapping(value = "/test/getMessage")
    Result<String> getMessage(@RequestParam(value = "name",required = false) String name);
}
  1. 编写测试方法
@RestController
@RequestMapping("/sys/test")
@Api(tags = "feign测试")
public class JeecgTestFeignTest {

   //注入feign客户端
   @Autowired
   private JeecgTestClient jeecgTestClient;

    @GetMapping("getMessage")
    @ApiOperation(value = "测试feign", notes = "测试feign")
    public Result<String> getMessage() {
        return jeecgTestClient.getMessage("jeecg-boot");
    }
}