Question

我正在测试POI资产（将数据写入Excell表格）。
我想每次都将x行写入xlsx文件。
我可以编写前X行，但是当我尝试编写另外X行时，我会遇到异常 -

org.apache.poi.openxml4j.exceptions.OpenXML4JRuntimeException：无法保存：保存包时发生错误：部件/docProps/app.xml无法使用marshaller org.apache.poi保存在流中。 openxml4j.opc.internal.marshallers.DefaultMarshaller@6825c828

public class ExcellTest
{
    XSSFWorkbook workbook;
    XSSFSheet sheet;
    int rowNum = 0;
    String excellFileName = "";
    FileOutputStream fileOut;

    public ExcellTest(String excellFileName) {
        createExcellSheet("test");
        this.excellFileName = excellFileName;
    }

    public void createExcellSheet(String sheetName) {
        workbook = new XSSFWorkbook();
        sheet =  workbook.createSheet(sheetName);
    }

    public void addData() {
        Row rowMsg = sheet.createRow((short)rowNum);
        rowNum++;

        Cell cell;        
        for (int i = 0; i < 200; i++) {
            cell = rowMsg.createCell(i);
            cell.setCellValue(rowNum);               
        }
    }

    public void createExcellFile() {
        try {
            fileOut =  new FileOutputStream(new File (excellFileName));//, true);
        }
        catch (IOException e) {
            System.out.print("Cant write workbook into file: " + excellFileName);
        }
    }

    public void writeExcellSheet() {
        // write workbook into file
        try {        
            workbook.write(fileOut);                        
        } catch (FileNotFoundException e) {
           System.out.print("Cant create file: " + excellFileName);
        } catch (IOException e) {
            System.out.print("Cant write workbook into file: " + excellFileName);
        }
    }

    public void closeFile() {      
        try {
            fileOut.close();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
}

public static void main(String[] args)
{
      ExcellTest excellTest = new ExcellTest("C:\\TestJavaBinary\\1.xlsx");
      excellTest.createExcellFile();

      // write 2 rows
      excellTest.addData();
      excellTest.addData();        
      excellTest.writeExcellSheet();

      // write 2 additional rows
      excellTest.addData();
      excellTest.addData();

      // THE NEXT LINE WILL THROW EXCEPTION 
      excellTest.writeExcellSheet();
      excellTest.closeFile();
}

我只能将行写入xlsx文件一次，因为第二次尝试会抛出异常：

Exception in thread "main" org.apache.poi.openxml4j.exceptions.OpenXML4JRuntimeException: Fail to save: an error occurs while saving the package : The part /docProps/app.xml fail to be saved in the stream with marshaller org.apache.poi.openxml4j.opc.internal.marshallers.DefaultMarshaller@6825c828
    at org.apache.poi.openxml4j.opc.ZipPackage.saveImpl(ZipPackage.java:503)
    at org.apache.poi.openxml4j.opc.OPCPackage.save(OPCPackage.java:1425)
    at org.apache.poi.POIXMLDocument.write(POIXMLDocument.java:201)
    at mainPkg.ExcellTest.writeExcellSheet(ExcellTest.java:58)
    at mainPkg.Main.main(Main.java:23)
Caused by: org.apache.poi.openxml4j.exceptions.OpenXML4JException: The part /docProps/app.xml fail to be saved in the stream with marshaller org.apache.poi.openxml4j.opc.internal.marshallers.DefaultMarshaller@6825c828
    at org.apache.poi.openxml4j.opc.ZipPackage.saveImpl(ZipPackage.java:494)

为什么我得到org.apache.poi.openxml4j.exceptions.OpenXML4JRuntimeException？

0 个答案: