[英]How Do I Output To A Specific Column and Worksheet Using Apache POI?
I am teaching myself Apache POI on the fly this weekend. 这个周末我要在自学Apache POI。 My latest task is to take a column that has numerical values and also blank cells, and add values to the blank ones.
我的最新任务是获取具有数值和空白单元格的列,并将值添加到空白单元格中。 I think I've almost accomplished that much with a switch statement and setCellValues, but I cannot seem to output the contents back to my workbook on the specific sheet and column.
我想我用switch语句和setCellValues差不多可以做到,但是我似乎无法将内容输出到特定工作表和列上的工作簿中。
Here is what I Have below. 这是我下面的内容。 The data is pulled into the method just fine.
数据被很好地拉入方法中。
Random randomNum = new Random();
double randomD = randomNum .nextDouble();
for (Row row : sheet2) {
for (Cell cell : row) {
switch (cell.getCellType()) {
case Cell.CELL_TYPE_NUMERIC:
System.out.println(cell.getNumericCellValue());
break;
case Cell.CELL_TYPE_BLANK:
cell.setCellValue(randomD);
FileOutputStream fileOut = new FileOutputStream("C:/Users/testtest/Desktop/Test/ProductTests.xls");
wb.write(fileOut);
fileOut.close();
System.out.println(cell.getNumericCellValue());
break;
default:
System.out.println();
}
}
}
First: Don't try to write the whole file on every cell, only do this at the end when you have done all the changes 第一:不要尝试在每个单元格上写入整个文件,只有在完成所有更改后才这样做
Second: Do no try to write to the same file that you used for loading, POI does not support in-place writing of changes (yet). 第二:不要尝试写入与用于加载的文件相同的文件,POI不支持就地写入更改(但)。
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