otl插入sqlite中文乱码

网上找了一个转换 字符串的方法

string GBKToUTF8(std::string& strGBK)
{ 
  string strOutUTF8 = ""; 
  wchar_t * str1; 
  int n = MultiByteToWideChar(CP_ACP, 0, strGBK.c_str(), -1, NULL, 0);
  str1 = new WCHAR[n]; 
  MultiByteToWideChar(CP_ACP, 0, strGBK.c_str(), -1, str1, n);
  n = WideCharToMultiByte(CP_UTF8, 0, str1, -1, NULL, 0, NULL, NULL); 
  char * str2 = new char[n]; 
  WideCharToMultiByte(CP_UTF8, 0, str1, -1, str2, n, NULL, NULL); 
  strOutUTF8 = str2; 
  delete[]str1; 
  str1 = NULL; 
  delete[]str2; 
  str2 = NULL; 
  return strOutUTF8;
}

在提交到数据库操作时用这个方法转换一下就可保存成中文了

void insert()
{ 
 otl_stream 
   o(50,      "insert into test_tab values(:f1<int>,:f2<char[31]>)", 
             db     );
 char tmp[32];

 string tt="姓名bhgy765_+00";
 string ts=GBKToUTF8(tt);

 strcpy(tmp,ts.c_str());

 o<<1<<tmp;


}