OpenSource——BasicExcel

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前言:

       一年前在学数据库的时候,有个想法,就是怎么用代码来读取excel的数据;为此,我曾请教Boss Liu,Boss Liu指点说OpenSource里有我要的东西。由于一些小事情,耽搁了,结果这个想法就over了;没想到,现在我需要用上;既然如此,那我得好好学学。在此我要感谢Boss Liu的指导,否则对于这问题,我估计现在也不知道怎么解决;

正题:

BasicExcel

        1.设计者:新加坡人Yap Chun Wei;

       2.基本的功能(对excel里的sheet进行的操作):

                1)Read and write number (integers, real numbers) and strings (ANSI, UTF16)

                2)Add worksheets

                3)Rename worksheets

                4)Delete worksheets

                5)Get the name of a worksheet

       3.优点:

                   1)采用com方式实现,访问速度快,api接口也比较简单

             2)可以跨平台使用

       4.一些操作(读取操作)的具体实现

       1)prepare:

       下载BasicExcel;说明:该包里面有四个文件,由于演示程序不是没用MFC,所以只需要将BasicExcel.hpp与BasicExcel.cpp放在你建的工程下面,或者可以将四个文件都放在你自己的类库中,然后导入;

       使用的excel的名字:classification.data.xls

      sheet的名字analysis.data

        2)show:

#include "BasicExcel.hpp"
// Load a workbook with one sheet, display its contents
int main(int argc, char* argv[])
{
	BasicExcel e;
	// load excel
	e.Load("classification.data.xls");

	BasicExcelWorksheet* sheet = e.GetWorksheet("analysis.data");
	if (sheet){
		size_t maxRows = sheet->GetTotalRows();
		size_t maxCols = sheet->GetTotalCols();
		cout << "Dimension of " << sheet->GetAnsiSheetName() <<
			" (" << maxRows << ", " << maxCols << ")" << endl;

		for (size_t r = 0; r < maxRows; ++r){
		   printf("%10d", r+1);
		   for (size_t c = 0; c < maxCols; ++c){
				BasicExcelCell* cell = sheet->Cell(r,c);
				switch (cell->Type())
				{
				  case BasicExcelCell::UNDEFINED:
					printf(" ");
					break;
				  case BasicExcelCell::INT:
					printf("%10d", cell->GetInteger());
					break;
				  case BasicExcelCell::DOUBLE:
					printf("%10.6lf", cell->GetDouble());
					break;
				  case BasicExcelCell::STRING:
					printf("%10s", cell->GetString());
					break;
				  case BasicExcelCell::WSTRING:
					wprintf(L"%10s", cell->GetWString());
					break;
				}
		   }
		  cout << endl;
		}
	}else{
		printf("cannot read this sheet!\n");
	}
	cout << endl;
 
  return 0;
}
#include "BasicExcel.hpp"
// Create a new workbook and write some contents.
int main(int argc, char* argv[])
{
	BasicExcel e;
	// create a workbook
	e.New();
	// create a sheet
	BasicExcelWorksheet* sheet = e.AddWorksheet("analysis.data");
	// cell
	BasicExcelCell* cell;
	
	if (sheet){
		size_t c;
		// SetString
		for (c = 0; c < 4; ++c){
		   cell = sheet->Cell(0, c);
		   cell->SetString("property");
		   // sheet->Cell(0,c)->SetInteger("property");
		}
        // SetInteger
		for (c = 0; c < 4; ++c){
		   cell = sheet->Cell(1, c);
		   cell->SetInteger(c);
		   // sheet->Cell(1,c)->SetInteger(c);
		}
		// SetDouble
		for (c = 0; c < 4; ++c){
		   cell = sheet->Cell(2, c);
		   double data = c / 2.0;
		   cell->SetDouble(data);
		   // sheet->Cell(2,c)->SetDouble(data);
		}
	}
	// save to a excel
	e.SaveAs("classification.data.xls");

	return 0;
}

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