style.xml 破解受密码保护的 XSSFWorkbook (Apache POI v3.16) 保存过程 [英] styles.xml breaking password-protected XSSFWorkbook (Apache POI v3.16) save process

问题描述

目前在 Java 版本 1.7.0-251 (Unix) 上使用 Apache POI 3.16

Currently using Apache POI 3.16 on Java version 1.7.0-251 (Unix)

从@Aniruddh Chandegra (如何使用 Apache POI 3.14 创建和编辑密码保护的 Excel 表格?)

Taking a leaf out of the example explained by @Aniruddh Chandegra (How to create and edit a password protect excel sheet using Apache POI 3.14?)

注意:我在服务器端 Javascript 上运行代码 - 使用 Mozilla Rhino v1.7R3，它支持几乎所有 ECMAScript 版本 5 以及 Mozilla Javascript 1.8 的一些功能.

Note: I'm running the code on - server-side Javascript - using Mozilla Rhino v1.7R3 which provides support for nearly all of ECMAScript Edition 5 plus a few features from Mozilla Javascript 1.8.

var wb = new XSSFWorkbook();
var createHelper = wb.getCreationHelper();

// Begin filling in rows/cells
addMostRecentSheet(wb);

var filepath = [hidden]
var fileOut = new java.io.FileOutputStream(filepath);
wb.write(fileOut);
fileOut.close();

var fs = new POIFSFileSystem();

var info = new EncryptionInfo(EncryptionMode.agile, CipherAlgorithm.aes192, HashAlgorithm.sha384, -1, -1, null);
var enc = info.getEncryptor();
enc.confirmPassword("password");

var os = enc.getDataStream(fs);
opc.saveImpl(os);  //<<-----Crash there - unable to save /x1/styles.xml
opc.close();

var fos = new java.io.FileOutputStream(filepath);
fs.writeFilesystem(fos);
fos.close();  

我最终设法保存了受密码保护的 xlsx，但我不得不删除日期列的样式.

I eventually managed to save password protected xlsx but I had to remove the styling of Date columns.

以下是将单元格格式化为日期单元格类型的代码:

Below is the code to format cells into Date celltype:

function createDateCell(row, colNum, value)
{
    var cell;
    if (value)
    {
        cell = row.createCell(colNum);
        cell.setCellValue(value);
        var cellStyle = wb.createCellStyle();
        cellStyle.setDataFormat(createHelper.createDataFormat().getFormat("dd/mm/yyyy"));
        cell.setCellStyle(cellStyle)
    }
    else
    {
        cell = row.createCell(colNum, Cell.CELL_TYPE_BLANK);
    }
    return cell;
}

但是在运行程序时，我不断收到此错误，是否有保留日期列类型的解决方法?错误信息:

Yet when running the program, I keep getting this error, is there a workaround to keep the Date column type? The error message:

org.apache.poi.openxml4j.exceptions.OpenXML4JRuntimeException: 
Fail to save: an error occurs while saving the package : 
The part /xl/styles.xml failed to be saved in the stream with marshaller
org.apache.poi.openxml4j.opc.internal.marshallers.DefaultMarshaller@216fb8e 

推荐答案

要创建日期样式单元格，您需要这样做:

To create date style cells, you need to do this:

var wb = new XSSFWorkbook();
var createHelper = wb.getCreationHelper();
var dateStyle = wb.createCellStyle();
dateStyle.setDataFormat(createHelper.createDataFormat().getFormat("dd/mm/yyyy"));

您只需要做一次.通过在顶部设置 cellStyle，您只填充了/xl/styles.xml 一次.

You only need to do it once. By setting the cellStyle at the top, you've populated /xl/styles.xml only once.

在填充单元格时，您只需将 dateStyle 添加到函数中:

When populating the cells, you simply add the dateStyle to the function:

createDateCell(row, colNum++, tables.SHE_SOUTH.DOB.value, dateStyle);

函数 createDateCell 只需添加 cellStyle:

The function createDateCell simply add the cellStyle:

function createDateCell(row,colNum,value, cellStyle){
    var cell;
    if(value){
        cell = row.createCell(colNum, Cell.CELL_TYPE_NUMERIC);
        cell.setCellValue(value);
        cell.setCellStyle(cellStyle);
    }
    else
    {
        cell = row.createCell(colNum, Cell.CELL_TYPE_BLANK);
    }
    return cell;
}

这样/xl/styles.xml 就不会像以前那样臃肿了.这允许加密工作簿.很好用，归功于 Axel Richter

That way the /xl/styles.xml doesn't get bloated as before. Which allows the encryption of the workbook. Works a treat, with credit to Axel Richter

这篇关于style.xml 破解受密码保护的 XSSFWorkbook (Apache POI v3.16) 保存过程的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！