cloud项目中常见错误

• 错误1：服务调用时报错
• 服务消费者模块assess通过openFeign调用服务提供者模块hires
• 如下为服务提供者模块hires的控制层接口

@RestController
@RequestMapping("/hires")
public class FeignController {
 
    @Autowired
    private UserService userService;
 
    @RequestMapping(value = "/getInfo", method = RequestMethod.GET)
    public RespResult getUserinfo(@RequestParam(value = "id") int id){
        User userInfo = userService.getUserInfo(id);
        return RespResult.success(userInfo);
    }
 
}
 

• 如下为服务消费者模块assess的service层

@Component
@FeignClient(value = "hires-8081")
public interface UserFeignService {
 
    @RequestMapping(value = "/hires/getInfo", method = RequestMethod.GET)
    public RespResult getUserinfo(@RequestParam(value = "id") int id);
 
}
 

• 以下为服务消费者模块assess的控制层

@RestController
@Slf4j
public class UserFeignController {
    @Resource
    private UserFeignService userFeignService;
 
    @RequestMapping(value = "/hi", method = RequestMethod.GET)
    public RespResult getUserinfo(@RequestParam(value = "id") int id){
        return userFeignService.getUserinfo(id);
    }
 
}
 

• 错误还原：通过服务消费者模块assess-8082调用hires-8081时报错status 405 reading EmpService#findAll(Integer);

• 错误原因：在调用方法时应使用@RequestParam(value = "id")注入参数

• 参考

• 错误2：启动时报错，当前服务没有找到另一个子模块的公共类

解决方案：将公共模块编译打包发布

• 将公共模块打包，引入公共模块包

• 如下为公共模块
  

• 其他微服务中引入
  

• 错误3：分布式微服务启动时报错：'artifactId' with value 'java' does not match a valid id pattern

错误原因：新建项目时项目名中包好空格，pom文件中artifactid中包含空格

• 错误4：分布式微服务启动时报错：Error: Could not find or load main class
  

• 错误5：导入项目后显示红色波浪线，报错等

删除.idea  .mvn等文件重新编译打包项目
拉取cloud项目到本地后应先编译打包父工程，再编译打包子项目，否则会报找不到某个公共模块的错误