读取多个Excel工作表 [英] Reading multiple excel sheet

问题描述

我正在尝试使用foor循环阅读电子表格的表格.我想知道这是正确的阅读方式，尤其是Sheet Propety的使用[在代码中突出显示]:

I am trying to read the sheets of a spread sheet uisng a foor loop. I wanted to know is this the right way of reading especially the use of Sheet Propety [highlighted in the code] :

Cell[][] newcell=new Cell[200][200];   
int newsheet = workbook1.getNumberOfSheets();
for (int q=1;q < newsheet;q++)    
{
    for(int p=0;p < sheet(q).getColumns();p++)
    {
         for(int p1=0;p1<sheet(q).getRows();p1++)
                       /*^^^^^^^^^*/
         {
               newcell[p][p1] = sheet(q).getCell(p, p1);
                              /*^^^^^^^^^*/
               if(newcell[p][p1].equals(saved[j]))
               {
                    System.out.print( newcell[p][0]);
                }
          }
     }   
}

是否可以将sheet()的属性用作sheet(q)，因为它会抛出NullPointerException?

Can I use the property of sheet() as sheet(q) because its throwing NullPointerException?

推荐答案

处理POI中所有单元格的常用样式是:

The usual style for working with all the cells in POI is:

for(int sheetNum=0; sheetNum < wb.getNumberOfSheets(); sheetNum++) {
    Sheet sheet = wb.getSheetAt(sheetNum);
    for (Row row : sheet) {
        for (Cell cell : row) {
            // Do something here
        }
    }
}

也许将您的代码切换到更多类似的东西?

Maybe switch your code to something more like that?

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