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//微服务全局登录用户id注解如配置.java // 定义 登录用户id 注解 @Target(ElementType.PARAMETER) @Retention(RetentionPolicy.RUNTIME) @Documented public @interface LoginUserid { boolean required() default true; } // springcloud-gateway //实现GlobalFilter接口，在 filter 接口鉴权通过之后， //将用户信息用 Base64 encode之后，置于ServerWebExchange中，方便微幅端接收. public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) { ServerHttpRequest request = exchange.getRequest(); HttpHeaders httpHeaders = request.getHeaders(); String token = httpHeaders.getFirst("usr-token"); if (!StringUtils.isEmpty(token)) { String authHeaderUid = Base64.getEncoder().encodeToString(String.valueOf(userId).getBytes(StandardCharsets.UTF_8)); ServerHttpRequest shr = exchange.getRequest().mutate(). header("Authorized-UserId", new String[]{authHeaderUid}).build(); return chain.filter(exchange.mutate().request(shr).build()); } return loginRequired(exchange.getResponse()); // 提示登录 } /* 定义 userid 解析器，其做用是解析 来自 微服务网关中 预编码过的用户id字符串（请求头中），方便各个具体的微服务 模块中各个 action (controller) 直接使用 userId; */ public class LoginUserHandlerMethodArgumentResolver implements org.springframework.web.method.support.HandlerMethodArgumentResolver { @Override public boolean supportsParameter(MethodParameter methodParameter) { return methodParameter.hasParameterAnnotation(LoginUserid.class); } @Override public Object resolveArgument(MethodParameter methodParameter, ModelAndViewContainer modelAndViewContainer, NativeWebRequest nativeWebRequest, WebDataBinderFactory webDataBinderFactory) throws Exception { String encodedUserId = nativeWebRequest.getHeader("Authorized-UserId"); // passed from gateway if (StringUtils.isEmpty(hashedUserId)) return null; Long userId = Long.parseLong(new String(Base64.getDecoder().decode(encodedUserId))); return userId; } } // 例如 // 在 user-service 微服务中 进行如下配置 @Configuration public class serWebMvcConfig implements WebMvcConfigurer { @Override public void addArgumentResolvers(List<HandlerMethodArgumentResolver> argumentResolvers) { argumentResolvers.add(new LoginUserHandlerMethodArgumentResolver()); } } @RestController public class UserControllerStub { @GetMapping("/echo") public Map<String, Object> echo(@LoginUserid Long uid) { System.out.println("echo() runs : " + uid); return Map.of(); } }