java web poi操作

/**
*  读取Excel流
*/
POIFSFileSystem fs = new POIFSFileSystem(in);
// 得到Excel工作簿对象
HSSFWorkbook wb = new HSSFWorkbook(fs);
for (int i = 0; i < wb.getNumberOfSheets(); i++) {
HSSFSheet sheet = wb.getSheetAt(i);
for (int j = 0; j <= sheet.getLastRowNum(); j++) {
HSSFRow row = sheet.getRow(j);
for (int k = 0; k < row.getLastCellNum(); k++) {
HSSFCell cell = row.getCell((short) k);
System.out.print("\t"+cell.toString());
}
System.out.println();
}
System.out.println("\n");
}


/**
 * 生成Excel
 * @throws Exception
 */
public HSSFWorkbook exportExcel() throws Exception
{
HSSFWorkbook wb = new HSSFWorkbook();
// 设置样式
HSSFCellStyle topStyle = wb.createCellStyle();
HSSFCellStyle infoStyle = wb.createCellStyle();