问题描述
Excel 格式 - .xls
我正在尝试将值从一个 Excel 工作表复制/粘贴到另一个现有的 Excel 工作表。我无法在空行中写入值。如果 Excel 行有一些值,则它正在更新。请检查下面的代码。
我的代码:
FileInputStream file = new FileInputStream(new File(strWorkBookName));
hssfWorkbook strWorkBook = new hssfWorkbook(file);
hssfSheet sheet = strWorkBook.getSheet(sheetName);
// Retrieve the row and check for null
hssfRow sheetrow = sheet.getRow(rowNo);
if(sheetrow == null){
logger.info("CREATING ROW"+rowNo);
sheetrow = sheet.createRow(rowNo);
}
// Update the value of a cell
hssfCell cell = sheetrow.getCell(columnNo);
if(cell == null){
logger.info("CREATING COLUMN " + columnNo);
cell = sheetrow.createCell(columnNo); }
cell.setCellValue(valuetoUpdate);
FileOutputStream outFile = new FileOutputStream(new File(strWorkBookName));
strWorkBook.write(outFile);
outFile.close();
解决方法
您确定您正在正确验证现有 Excel 文件是否正在更新?
您忘记关闭 Workbook
对象,但您的代码对我来说仍然像魅力一样工作。这是我测试过的工作代码(适用于完整行和空行):
public static void main(String[] args) throws IOException {
int sheetPosition = 0;
int rowPosition = 100;
int cellPosition = 100;
String excelFilePath = "D:\\Desktop\\testExcel.xls";
FileInputStream fileInputStream = new FileInputStream(new File(excelFilePath));
HSSFWorkbook workbook = new HSSFWorkbook(fileInputStream);
HSSFSheet sheet = workbook.getSheetAt(sheetPosition);
HSSFRow sheetrow = sheet.getRow(rowPosition);
if (sheetrow == null){
System.out.println("new row at position " + rowPosition);
sheetrow = sheet.createRow(rowPosition);
}
HSSFCell cell = sheetrow.getCell(cellPosition);
if(cell == null){
System.out.println("new cell (for row " + rowPosition + ") at position " + cellPosition);
cell = sheetrow.createCell(cellPosition);
}
cell.setCellValue("New Amazing Value!");
FileOutputStream outFile = new FileOutputStream(new File(excelFilePath));
workbook.write(outFile);
outFile.close();
workbook.close(); // <-- Do not forget that!
}