如何阻止輸出的 excel 文件損壞？

Question

我正在從以下代碼創建報告並使用石英調度程序對其進行調度，但是當它被保存時，它被破壞了..

public class GenerateReport implements Job{

    XSSFWorkbook report = new XSSFWorkbook();
    MyData myData = new MyData();

    public XSSFWorkbook createReport() {
        Map<Integer, String> data = new HashMap<Integer, String>();
        myData.setData(1652, "Abcs");
        myData.setData(1682, "ksaos");
        myData.setData(1152, "oass");
        myData.setData(1962, "Aajas");

        data = myData.getData();

        XSSFSheet sheet = report.createSheet("Employee data");
        XSSFCellStyle headerStyle = report.createCellStyle();

        XSSFFont headerFont = report.createFont();
        headerFont.setBold(true);
        headerStyle.setFont(headerFont);

        XSSFCell cell = null;
        XSSFRow row;
        int rowNum = 0;
        int colNum = 0;

        row = sheet.createRow(rowNum++);
        row.createCell(colNum++).setCellValue("ID");
        row.createCell(colNum).setCellValue("Name");


        for(Map.Entry<Integer, String> entry: data.entrySet()) {
            colNum = 0;
            row = sheet.createRow(rowNum++);
            cell = row.createCell(colNum++);
            cell.setCellValue(entry.getKey());

            cell = row.createCell(colNum);
            cell.setCellValue(entry.getValue());
        }


        return report;
    }

    public void saveReport() {
        XSSFWorkbook finalWorkbook = new XSSFWorkbook();
        try {
            FileOutputStream fos = new FileOutputStream("C:\\Users\\ra185586\\Desktop\\written.xlsx");
            finalWorkbook.write(fos);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        System.out.print("Report generated");
    }

    @Override
    public void execute(JobExecutionContext arg0) throws JobExecutionException {

        createReport();
        saveReport();
        System.out.println(" and saved");

    }
}

你們能不能幫我解決一下，這樣當報告被保存時，它就不會被破壞。 謝謝！

Answer 1

您的方法 createReport() 返回 XSSFWorkbook。 並且您需要將此 XSSFWorkbook 傳輸到 saveReport。

- 在saveReport(createReport());上execute兩行saveReport(createReport());

- 在saveReport XSSFWorkbook finalWorkbook = new XSSFWorkbook();中saveReport XSSFWorkbook finalWorkbook = new XSSFWorkbook();

- 在saveReport saveReport(XSSFWorkbook finalWorkbook)