如何使用Java Eclipse閱讀Excel頁面的特定工作表

Question

我想閱讀Excel電子表格的第3張紙，並比較包含日期的D列和F列。 如何閱讀這些專欄並在Eclipse中進行比較？

我想使用Apache POI 。

提前致謝。

Answer 1

FileInputStream file = new FileInputStream(new File("C:\\test.xls"));

//Get the workbook instance for XLS file 
HSSFWorkbook workbook = new HSSFWorkbook(file);

//Get third(numbering starts from 0) sheet from the workbook
HSSFSheet sheet = workbook.getSheetAt(2);

//Get iterator to all the rows in current sheet
Iterator<Row> rowIterator = sheet.iterator();

// Iterate through rows
while (rowIterator.hasNext()) {
    Row row = rowIterator.next();

    // Index of column D is 3 (A->0, B->1, etc)
    Cell cellD = row.getCell(3);
    Cell cellF = row.getCell(5);

    Date dateD = HSSFDateUtil.getJavaDate(cellD.getNumberValue()); 
    Date dateF = HSSFDateUtil.getJavaDate(cellF.getNumberValue()); 

    // Your business logic continues....
}