modify:

1. 增加项目内容变更修改；

hz-pm-api/src/main/java/com/hz/pm/api/projectlib/manage/ProjectChangeManage.java

@@ -89,9 +89,9 @@ public class ProjectChangeManage {
             throw BizException.wrap("暂无法提交变更申请");
         }
         ProjectDetailVO projDetailOld = projectLibManage.getProjectDetail(project);
-
         List<FieldDiff> projDiffs = ProjectDetailDiffUtil.diff(projDetailOld, projJsonObj, true,
                 EditProjectDTO.SYSTEM_REPLACE_INFOS, "id", "projectCode");
+        int changeFieldsCount = projDiffs.size();
         List<GovSystemReplaceInfoDTO> systemReplaceInfos = reqProj.getSystemReplaceInfos();
         List<GovSystemReplaceInfoDTO> systemReplaceInfosOld = projDetailOld.getSystemReplaceInfos();
         if (!CollUtil.isEqualList(systemReplaceInfos, systemReplaceInfosOld)) {
@@ -101,6 +101,7 @@ public class ProjectChangeManage {
                     .oldValue(systemReplaceInfosOld)
                     .newValue(systemReplaceInfos)
                     .build());
+            changeFieldsCount++;
         }
         projectEditDetail.set(EditProjectDetailDTO.FIELD_PROJECT_DIFFS, projDiffs);
         List<JSONObject> purchaseJsonObjs = projectEditDetail.getBeanList(EditProjectDetailDTO.FIELD_PURCHASES, JSONObject.class);
@@ -134,13 +135,16 @@ public class ProjectChangeManage {
                     List<FieldDiff> purchaseDiffs = ProjectDetailDiffUtil.diff(purchase, reqPurchase, true, "id");
                     List<FieldDiff> operationDiffs = ProjectDetailDiffUtil.diff(operation, reqOperation, true, "id");
                     List<FieldDiff> contractDiffs = ProjectDetailDiffUtil.diff(contract, reqContract, true, "id");
+                    changeFieldsCount += purchaseDiffs.size() + operationDiffs.size() + contractDiffs.size();
                     reqPurchaseDetail.set(EditPurchaseDetailDTO.FIELD_PURCHASE_DIFFS, purchaseDiffs);
                     reqPurchaseDetail.set(EditPurchaseDetailDTO.FIELD_CONTRACT_DIFFS, contractDiffs);
                     reqPurchaseDetail.set(EditPurchaseDetailDTO.FIELD_OPERATION_DIFFS, operationDiffs);
                 }
             }
         }
-
+        if (changeFieldsCount == 0) {
+            throw BizException.wrap("项目内容无修改");
+        }
         UserInfoDetails userDetail = LoginUserUtil.loginUserDetail();
 
         WflowModels wflowModels = processModelManage.getWflowModelsNoNull(ProjectProcessType.PROJECT_CHANGE, userDetail.getMhUnitId());
@@ -206,7 +210,7 @@ public class ProjectChangeManage {
         return result;
     }
 
-    public ProjectChangeDetailVO changeDetail(Long projectId,String instCode) {
+    public ProjectChangeDetailVO changeDetail(Long projectId, String instCode) {
         Wrapper<ProjectChangeHistory> query = Wrappers.lambdaQuery(ProjectChangeHistory.class)
                 .eq(ProjectChangeHistory::getProjectId, projectId)
                 .eq(ProjectChangeHistory::getInstCode, instCode);