增加获取当前登录用户名功能，增加送返修工单excel文件读取功能。

代码/cpp/car_dealer_util/source/system/system_util.cpp

@@ -0,0 +1,25 @@
+
+#include "system_util.h"
+
+using namespace std;
+
+const unsigned int BUFFER_SIZE = 1024;
+
+std::wstring getUserName()
+{
+	wstring userName;
+	wchar_t szUserName[BUFFER_SIZE];
+	DWORD userNameBufferSize = BUFFER_SIZE;
+
+	if ( GetUserNameW( szUserName, &userNameBufferSize ) == false )
+	{
+		throw runtime_error("获取操作系统用户名失败！");
+	}
+
+	if ( userNameBufferSize != 0 )
+	{
+		userName = szUserName;
+	}
+
+	return userName;
+}

代码/cpp/car_dealer_util/source/system/system_util.h

@@ -0,0 +1,8 @@
+
+#pragma once
+
+#include <windows.h>
+#include <string>
+#include <stdexcept>
+
+std::wstring getUserName();