Java 如何使用 Apache POI 浏览工作簿的工作表？
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How to go though the sheets of a Workbook with Apache POI?
提问by Kotsor
I am a real newb programer trying to make a small java program that edits spreadsheets for a friend using Apache Poi. Currently I go through the excel file using this code:
我是一个真正的新手程序员，试图制作一个使用 Apache Poi 为朋友编辑电子表格的小型 Java 程序。目前我使用以下代码浏览 excel 文件：
Sheet paxgs = rs1.getSheetAt(0);
for (Row row : paxgs) {
Cell secCell = row.getCell(1);
Cell firstCell = row.getCell(0);
if (firstCell!=null && firstCell.getCellType()==firstCell.CELL_TYPE_STRING)
}
The problem is that I don't know the exact number of sheets that the excel file is going to have. I tried :
问题是我不知道 excel 文件将拥有的确切工作表数量。我试过 ：
Workbook rs1 = WorkbookFactory.create(new FileInputStream(filename));
for (Sheet sheet : rs1)
but it didn't work so I was wondering if there is any way to go through all the sheet of a workbook.
但它没有用，所以我想知道是否有任何方法可以浏览工作簿的所有工作表。
采纳答案by rgettman
A Workbookdoesn't implement Iterable<Sheet>like a Sheetimplements Iterable<Row>, so you can't use an "enhanced" for loop. But you can loop through the Sheetobjects yourself, with a traditional for loop. Use getNumberOfSheets()to find the number of sheets, and getSheetAtto retrieve the individual Sheetobjects.
AWorkbook不像 implementsIterable<Sheet>那样Sheet实现Iterable<Row>，因此您不能使用“增强型” for 循环。但是您可以Sheet使用传统的 for 循环自己循环遍历对象。使用getNumberOfSheets()找张数，并getSheetAt取回个人Sheet物品。
for (int i = 0; i < workbook.getNumberOfSheets(); i++)
{
Sheet sheet = workbook.getSheetAt(i);
// Process your sheet here.
}
回答by James Anderson
The workbook contains a protected field "_sheets" which is of type java.util.List so:-
该工作簿包含一个受保护的字段“_sheets”，其类型为 java.util.List，因此：-
rs1._sheets.size();
Should get you the number of sheets. You should also be able to iterate through this list.
应该给你张数。您还应该能够遍历此列表。
