修复历史病案导出表头丢失的问题

src/main/java/thyyxxk/webserver/service/inpatient/casefrontsheet/CaseFrontSheetExportService.java

@@ -2,6 +2,7 @@ package thyyxxk.webserver.service.inpatient.casefrontsheet;
 
 import com.alibaba.fastjson.JSONArray;
 import com.alibaba.fastjson.JSONObject;
+import com.alibaba.fastjson.serializer.SerializerFeature;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
@@ -206,7 +207,8 @@ public class CaseFrontSheetExportService {
             sheet.setDisdiag0(makeExportFormat(diagCodeArr[0], diagNameArr[0]));
 
             sheet.setSurgery0(makeExportFormat(surgeryCodeArr[0], surgeryNameArr[0], surgeryLevelArr[0]));
-            JSONObject obj = JSONObject.parseObject(JSONObject.toJSONString(sheet));
+            String jstring = JSONObject.toJSONString(sheet, SerializerFeature.WriteMapNullValue);
+            JSONObject obj = JSONObject.parseObject(jstring);
             if (request.needAllDiagnoses() && diagCodeArr.length > 1 && diagNameArr.length > 1) {
                 for (int i = 1; i < diagCodeArr.length; i++) {
                     obj.put("disdiag" + i, makeExportFormat(diagCodeArr[i], diagNameArr[i]));