帮后端问的，跨域请求头加上去了，但是为什么无效

java 部分的代码

@Configuration @EnableWebMvc public class CorsConfig implements WebMvcConfigurer { @Override public void addCorsMappings(CorsRegistry registry) { log.info("Adding CORS mappings"); registry.addMapping("/**") // 推荐限定路径前缀，而不是 /** .allowedOrigins("*") .allowedMethods("GET", "POST", "PUT", "DELETE", "OPTIONS") .allowedHeaders("*") .exposedHeaders("Authorization", "Link", "X-Total-Count") .allowCredentials(false) .maxAge(3600); } }@CrossOrigin(origins = "*", methods = {RequestMethod.GET, RequestMethod.POST, RequestMethod.PUT, RequestMethod.DELETE, RequestMethod.OPTIONS}) @RestController @RequestMapping("/count") public class LaborHourCountController { 

我还试了显示的处理 options 请求

@Slf4j @RestController @CrossOrigin(origins = "*", methods = {RequestMethod.GET, RequestMethod.POST, RequestMethod.PUT, RequestMethod.DELETE, RequestMethod.OPTIONS}) @RequestMapping("/laborOrder") public class LaborOrderController { @Resource private LaborOrderService laborOrderService; /** * 查询工时工单列表 * */ @PostMapping(value = "/getLaborOrder/list") public Result getLaborOrderList(@RequestBody LaborOrderVo laborOrderVo){ PageResult<LaborOrder> laborOrderList = laborOrderService.listByVo(laborOrderVo); return Result.success(laborOrderList); } // 显式处理 OPTIONS 请求 @RequestMapping(value = "/getLaborOrder/list", method = RequestMethod.OPTIONS) public ResponseEntity<?> handleOptions() { return ResponseEntity.ok() .header("Access-Control-Allow-Origin", "*") .header("Access-Control-Allow-Methods", "POST") .header("Access-Control-Allow-Headers", "Content-Type") .build(); } } 

仍然浏览器显示

Access to XMLHttpRequest at 'http://xxx:8085/laborOrder/getLaborOrder/list' from origin 'http://xxxx:5173' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource.