refactor(charging): 将post请求改为发送JSON格式的请求体

- 移除对Gson的依赖，改用JSONObject构造JSON字符串
- 将doPostForm调用替换为doPostJson调用，统一请求为JSON格式
- 更新推送充电订单、启动充电结果和停止充电结果的请求体格式
- 添加异常捕获和日志记录，增强错误追踪能力

src/main/java/com/zsElectric/boot/charging/service/impl/ChargingReceptionServiceImpl.java

@@ -8,7 +8,6 @@ import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
 import com.baomidou.mybatisplus.core.toolkit.Wrappers;
 import com.fasterxml.jackson.databind.JsonNode;
 import com.fasterxml.jackson.databind.ObjectMapper;
-import com.google.gson.Gson;
 import com.zsElectric.boot.business.mapper.*;
 import com.zsElectric.boot.business.model.entity.*;
 import com.zsElectric.boot.business.service.ChargeOrderInfoService;
@@ -186,9 +185,10 @@ public class ChargingReceptionServiceImpl implements ChargingReceptionService {
                             Map<String, Object> map = objectMapper.convertValue(jsonNode, Map.class);
                             map.put("chargeOrderNo", chargeOrderInfo.getChargeOrderNo());
                             FirmInfo firmInfo = firmInfoMapper.selectById(chargeOrderInfo.getFirmId());
+                            String requestBody = new JSONObject(map).toString();
                             if (ObjectUtil.isNotNull(firmInfo)) {
                                 try {
-                                    JsonNode response = okHttpUtil.doPostForm(firmInfo.getChannelUrl() + "/notification_charge_order_info", map, null);
+                                    JsonNode response = okHttpUtil.doPostJson(firmInfo.getChannelUrl() + "/notification_charge_order_info", requestBody, null);
                                     log.info("渠道方推送充电订单信息成功 - chargeOrderNo: {}, firmId: {}, response: {}", 
                                             chargeOrderInfo.getChargeOrderNo(), chargeOrderInfo.getFirmId(), response);
                                 } catch (Exception e) {
@@ -460,8 +460,8 @@ public class ChargingReceptionServiceImpl implements ChargingReceptionService {
                     map.put("connectorId", chargeOrderInfo.getConnectorId());
                     map.put("jsonNode", jsonNode);
                     String url = firmInfo.getChannelUrl() + "/notification_start_charge_result";
-                    Gson gson = new Gson();
-                    String requestBody = gson.toJson(map);
+                    String requestBody = new JSONObject(map).toString();
+
                     try {
                         JsonNode response = okHttpUtil.doPostJson(url, requestBody, null);
                         log.info("推送启动充电结果成功 - StartChargeSeq: {}, chargeOrderNo: {}, url: {}, response: {}",
@@ -557,7 +557,16 @@ public class ChargingReceptionServiceImpl implements ChargingReceptionService {
                                         HashMap<String, Object> map = new HashMap<>();
                                         map.put("chargeOrderNo", chargeOrderInfo.getChargeOrderNo());
                                         map.put("status", SystemConstants.STATUS_TWO);
-                                        okHttpUtil.doPostForm(firmInfo.getChannelUrl() + "/notification_stop_charge_result", map, null);
+                                        String url = firmInfo.getChannelUrl() + "/notification_stop_charge_result";
+                                        String requestBody = new JSONObject(map).toString();
+                                        try {
+                                            JsonNode response = okHttpUtil.doPostJson(url, requestBody, null);
+                                            log.info("推送停止充电结果成功 - StartChargeSeq: {}, chargeOrderNo: {}, url: {}, response: {}",
+                                                    startChargeSeq, chargeOrderInfo.getChargeOrderNo(), url, response);
+                                        } catch (Exception e) {
+                                            log.error("推送停止充电结果失败 - StartChargeSeq: {}, chargeOrderNo: {}, url: {}, params: {}",
+                                                    startChargeSeq, chargeOrderInfo.getChargeOrderNo(), url, map, e);
+                                        }
                                     }
                                 }
                             } else {