用release编译能读不能写，用的QT5.9

[hjfzxc]

QString xlsFile = QFileDialog::getExistingDirectory(this);
if(xlsFile.isEmpty())
return;
xlsFile += "/excelRWByCztr1988.xls";
if(m_xls.isNull())
m_xls.reset(new ExcelBase);
m_xls->create(xlsFile); //返回true
m_xls->setCurrentSheet(1); // 返回true
m_xls->writeCurrentSheet(write_data); //返回false，write_data已测试行数为187
m_xls->save();