func：导入导出添加基本替换功能。

src/data_edit.h

@@ -30,6 +30,13 @@ public:
     bool is_import_{false};
     bool is_import_sucess_{false};
 
+private:
+    void replace();
+    void with_draw();
+
+public:
+    QString pre_content_{};
+
 private:
     Ui::CDataEdit* ui;
     QString        data_{};