1、导入依赖
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-openfeign</artifactId>
<version>2.2.9.RELEASE</version>
</dependency>
2、编写配置类
我这里配置类包括FeignConfig和实体的配置类
PhotovoltFeignConfig: 日志level 和 请求拦截器 PhotovoltConfig: yml配置文件的信息
@Configurable
@Slf4j
public class PhotovoltFeignConfig implements RequestInterceptor {
public static String token;
@Bean
Logger.Level photovoltFeignLevel(){
return Logger.Level.FULL;
}
@Override
public void apply(RequestTemplate requestTemplate) {
requestTemplate.header("token", token);
}
}
@Data
@Component
@ConfigurationProperties(prefix = "photovolt")
public class PhotovoltConfig {
private static final long serialVersionUID = 1L;
@ApiModelProperty("地址")
private String url;
@ApiModelProperty("协议版本号")
private String version;
@ApiModelProperty("用户名")
private String username;
@ApiModelProperty("密码")
private String password;
}
3、开启FeignClients
我这里自定义了一个开启FeignClients的注解
@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
@Documented
@EnableFeignClients(basePackages = {"com.cspg.photovolt.api"})
@Import({PhotovoltFeignConfig.class,PhotovoltConfig.class})
public @interface EnablePhotovoltFeignClients {
}
然后添加这个注解到启动类里
@SpringBootApplication
@Slf4j
@MapperScan("com.cspg.photovolt.mapper")
@EnablePhotovoltFeignClients
@EnableScheduling
public class PhotovoltApplication {
public static void main(String[] args) {
SpringApplication.run(PhotovoltApplication.class, args);
}
}
4、编写客户端调用别人提供的http接口
@FeignClient 标注该类是一个feign接口 name:因为这里并未进行服务注册,所以就随便命名一个 url:服务提供方的接口地址 (别人提供的http接口地址)
@FeignClient(name = "photovolt",url = "${photovolt.url}")
@Component
public interface PhotovoltApi {
@PostMapping(value = "/login")
JSONObject login(@RequestBody JSONObject jsonObject);
@PostMapping(value = "/config_get")
JSONObject getConfig(@RequestBody JSONObject jsonObject);
@PostMapping(value = "/online_data_get")
JSONObject getOnlineData(@RequestBody JSONObject jsonObject);
}
5、调用服务端然后我们提供端接口
@RestController
@RequiredArgsConstructor
public class PhotovoltController {
private final PhotovoltApi photovoltApi;
private final PhotovoltConfig photovoltConfig;
@Autowired
private PvTelemeterStatusService pvTelemeterService;
@PostMapping(value = "/north/login")
@PostConstruct
@ApiOperation("4.2.1 建立连接")
@Scheduled(cron = "0/2 * * * * ? ")
public String login() {
PhotovoltRequest photovoltResult = new PhotovoltRequest();
JSONObject loginInfo = photovoltApi.login(photovoltResult.tologinJson());
System.out.println(loginInfo);
String error_msg = String.valueOf(loginInfo.get("error_msg"));
String token = error_msg.substring(error_msg.indexOf(":") + 1);
PhotovoltFeignConfig.token = token;
return token;
}
}
定时任务
上面已经写了,什么?????? 没错就那两个注解
//定时任务 @EnableScheduling
//每2秒执行一次那个方法 @Scheduled(cron = "0/2 * * * * ? ")
最后
注意: 我这里并没有向其他文章一样自己搞个服务端的Controller,因为那个服务的接口地址是别人厂家弄好的了,我拿来用就行,只需在@FeignClient里指明url,然后在每个方法里指明下地址即可,然后在编写一个Controller去调用它获取返回结果
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