// 使用Map构建请求体，让RestClient自动序列化为JSON

            java.util.Map<String, String> requestBody = new java.util.HashMap<>();

            requestBody.put("code", phoneCode);

            System.out.println("请求体对象: " + requestBody);

            String url = "https://api.weixin.qq.com/wxa/business/getuserphonenumber?access_token=" + accessToken;

            System.out.println("请求URL: " + url);

            String raw = null;

            try {

                // 使用RestClient，传入Map对象让其自动序列化为JSON

                raw = restClient.post()

                        .uri(url)

                        .contentType(MediaType.APPLICATION_JSON)

                        .accept(MediaType.APPLICATION_JSON)

                        .body(requestBody)  // 传入Map对象，RestClient会自动序列化为JSON

                        .retrieve()

                        .onStatus(status -> status.value() == 412, (request, response) -> {

                            System.err.println("微信API返回 412 Precondition Failed");

                            System.err.println("响应状态: " + response.getStatusCode());

                            System.err.println("响应头: " + response.getHeaders());

                            // 尝试读取响应体

                            try {

                                byte[] bodyBytes = response.getBody().readAllBytes();

                                String bodyStr = new String(bodyBytes, StandardCharsets.UTF_8);

                                System.err.println("响应体: " + bodyStr);

                            } catch (Exception ex) {

                                System.err.println("无法读取响应体: " + ex.getMessage());

                            }

                            throw new ApiException(HttpStatus.BAD_GATEWAY, "WECHAT_ERROR", 

                                "微信API返回412错误。\n\n" +

                                "可能原因：\n" +

                                "1. phoneCode已过期（有效期5分钟）或已被使用\n" +

                                "2. 服务器IP未加入微信公众平台IP白名单\n" +

                                "3. 请求体格式不符合微信要求\n" +

                                "4. access_token无效或过期\n\n" +

                                "请检查微信公众平台的接口权限设置");

                        })

                        .body(String.class);

            } catch (ApiException e) {

                // ApiException直接抛出

                throw e;

            } catch (Exception e) {

                System.err.println("调用微信API异常: " + e.getClass().getName());

                System.err.println("异常信息: " + e.getMessage());

                e.printStackTrace();

                // 检查是否是412错误

                if (e.getMessage() != null && e.getMessage().contains("412")) {

                    throw new ApiException(HttpStatus.BAD_GATEWAY, "WECHAT_ERROR", 

                        "微信API返回412错误。\n\n" +

                        "可能原因：\n" +

                        "1. phoneCode已过期（有效期5分钟）或已被使用\n" +

                        "2. 服务器IP未加入微信公众平台IP白名单\n" +

                        "3. 请求体格式不符合微信要求\n\n" +

                        "请检查微信公众平台的接口权限设置");

                }

                // 其他网络异常

                throw new ApiException(HttpStatus.BAD_GATEWAY, "WECHAT_ERROR", 

                    "调用微信API失败: " + e.getMessage());

            }

实在不知道啥问题，白名单啥的也设置了，求支援