小编Wil*_*ver的帖子

我遵循了使用Apache POI XSSF构建工作簿的简单指南.按照相同的指南,我能够写一个Excel工作表,但是当试图从一个读取时,我收到代码后显示的错误.

码:

try {
    FileInputStream file = new FileInputStream(new File("howtodoinjava_demo.xlsx"));

    // Create Workbook instance holding reference to .xlsx file
    XSSFWorkbook workbook = new XSSFWorkbook(file);

    // Get first/desired sheet from the workbook
    XSSFSheet sheet = workbook.getSheetAt(0);

    // Iterate through each rows one by one
    Iterator<Row> rowIterator = sheet.iterator();
    while (rowIterator.hasNext()) {
        Row row = rowIterator.next();
        // For each row, iterate through all the columns
        Iterator<Cell> cellIterator = row.cellIterator();

        while (cellIterator.hasNext()) {
            Cell cell = cellIterator.next();
            // Check the cell …