1、修改基本模型中数据从json读入的逻辑，添加了判断读出数据是否为空

CFDStruct/CFDStructDataManager/CFDStructDataSolverBasicModelManager.cpp

@@ -38,17 +38,29 @@ void CFDStructDataSolverBasicModelManager::saveDataToDom(rapidjson::Document &do
 void CFDStructDataSolverBasicModelManager::readDataFromDom(rapidjson::Document &dom) {
     QVariant temp;
     jsonRead(dom, temp, {"region", 0, "flowType"});
-    m_FlowModel = temp.toInt();
+    if (temp != QVariant()) {
+        m_FlowModel = temp.toInt();
+    }
     jsonRead(dom, temp, {"region", 0, "chimeraMesh"});
-    m_OverlayNetwork = temp.toInt();
+    if (temp != QVariant()) {
+        m_OverlayNetwork = temp.toInt();
+    }
     jsonRead(dom, temp, {"region", 0, "refValue", "rgas_mean"});
-    m_Rgasmean = temp.toDouble();
+    if (temp != QVariant()) {
+        m_Rgasmean = temp.toDouble();
+    }
     jsonRead(dom, temp, {"region", 0, "refValue", "gamma"});
-    m_Gmean = temp.toDouble();
+    if (temp != QVariant()) {
+        m_Gmean = temp.toDouble();
+    }
     jsonRead(dom, temp, {"region", 0, "solver", "turbModel", "RANS", "params", "Prl"});
-    m_Prlmean = temp.toDouble();
+    if (temp != QVariant()) {
+        m_Prlmean = temp.toDouble();
+    }
     jsonRead(dom, temp, {"region", 0, "solver", "turbModel", "RANS", "params", "Prt"});
-    m_Prtmean = temp.toDouble();
+    if (temp != QVariant()) {
+        m_Prtmean = temp.toDouble();
+    }
 }
 
 /**