/*** @author xbchenf* @date 2018-10-27 16:35:52* @description 通过拦截器，将head补上，避免session丢失*/
@Configuration
public class FeignConfiguration implements RequestInterceptor{private final Logger logger = LoggerFactory.getLogger(FeignConfiguration.class);@Overridepublic void apply(RequestTemplate template) {RequestAttributes requestAttributes = RequestContextHolder.getRequestAttributes();if (requestAttributes == null) {return;}HttpServletRequest request = ((ServletRequestAttributes) requestAttributes).getRequest();Enumeration<String> headerNames = request.getHeaderNames();if (headerNames != null) {while (headerNames.hasMoreElements()) {String name = headerNames.nextElement();Enumeration<String> values = request.getHeaders(name);while (values.hasMoreElements()) {String value = values.nextElement();logger.warn("name:"+name+";value:"+value);template.header(name, value);}}}}
}

@FeignClient(name = "mpmt-user")
public interface PersonFeignClient {@GetMapping("/feign/testGet/{id}")public ResponseEntity<JsonResult> testGet(@PathVariable(value = "id") Integer id);@PostMapping("/feign/testPost")public ResponseEntity<JsonResult> testPost(@RequestBody Person person);
}

@RestController
@RequestMapping("/feign")
public class FeignController {private final Logger logger = Logger.getLogger(FeignController.class);@GetMapping("/testGet/{id}")public ResponseEntity<JsonResult> testGet(@PathVariable(value = "id") Integer id,HttpServletRequest request) {JsonResult r = new JsonResult();try {logger.info("sessionid:"+request.getSession().getId());User user = (User)request.getSession().getAttribute("sessionUser");logger.info("userId:"+user.getId());r.setResult(user);r.setStatus("200");} catch (Exception e) {r.setResult(e.getClass().getName() + ":" + e.getMessage());r.setStatus("error");e.printStackTrace();}return ResponseEntity.ok(r);}/*** 添加用户* 提供给后端feign调用的接口，post请求都要使用@RequestBody ，包括feign中定义的接口* @param person* @return*/@PostMapping("/testPost")public ResponseEntity<JsonResult> testPost(@RequestBody Person person,HttpServletRequest request) {JsonResult r = new JsonResult();try {logger.info("sessionid:"+request.getSession().getId());User user = (User)request.getSession().getAttribute("sessionUser");logger.info("userId:"+user.getId());r.setResult(person);} catch (Exception e) {r.setResult(e.getClass().getName() + ":" + e.getMessage());r.setStatus("error");e.printStackTrace();}return ResponseEntity.ok(r);}}