XLSX | 易学教程

convert xls to json in python

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问题 I am trying to convert xls to json and but when I am executing the code it's not giving me the data inside xls sheet, it's only giving me the json structure. Below is the code which I am running, I am not able to understand what modification I should further make in this so that I can get a perfect json file. Please note - input is in the form of binary stream and output is also in the form of a stream and not file. #!/usr/bin/python -u import sys import xlrd import simplejson from

来，通过 Excel 来认识神器——POI

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1、POI是什么 Apache POI - the Java API for Microsoft Documents，顾名思义，Apache的三方包，用来操作微软office文档的，多数时候用来操作excel，所以这里就以excel方面来说明。需要引入两个包，maven地址如下（version 3.9）： <dependency> <groupId>org.apache.poi</groupId> <artifactId>poi</artifactId> <version>3.9</version> </dependency> <dependency> <groupId>org.apache.poi</groupId> <artifactId>poi-ooxml</artifactId> <version>3.9</version> </dependency> POI的组件列表中，针对excel的主要是HSSF和XSSF组件，前者针对97-2007的通用版excel，即后缀xls；后者针对2007或更高版的excel，即后缀xlsx。官方概要如下： HSSF is the POI Project's pure Java implementation of the Excel '97(-2007) file format. XSSF is the POI Project's

Apache POI throwing OOM error when trying to password protect modest sized XLSX workbooks (~=80MB)

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问题 using java 8 and apache POI and POI-OOXML 3.14 Here's my method: private static void encryptXlsx(String inputPath, String outputPath, String password) throws IOException, InvalidFormatException, GeneralSecurityException { //create a new workbook Workbook wb = WorkbookFactory.create(new File(inputPath)); //Add password protection and encrypt the file POIFSFileSystem fs = new POIFSFileSystem(); EncryptionInfo info = new EncryptionInfo(EncryptionMode.agile); Encryptor enc = info.getEncryptor();

Apache POI throwing OOM error when trying to password protect modest sized XLSX workbooks (~=80MB)

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JS Library to create formatted XLSX spreadsheets

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问题 I'm currently creating generic spreadsheets in JS using https://www.npmjs.com/package/xlsx . This works fine to generate just a generic spreadsheet to display my data. However, I wanna add a few features. https://imgur.com/a/gJE9mXg is an example of what I want to achieve. It was created using Apache POI, which is only available for Java. The features I want in that screenshot are The ability to add a picture (seen as a logo in the top-left) Ability to change font-color (as seen in the Title

JS批量导入execel、下载模板文件功能（结尾有VUE教程）

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事先准备: 第1步：先导入excel处理的插件，网上下载。 <script type="text/javascript" src="../js/xlsx.core.min.js"></script> <script type="text/javascript" src="js/xlsx.full.min.js"></script> 第2步：先建个execel模板，导入到项目文件中。例如：最后我们可以编写代码了：先上HTML吧，这样好理解js的内容，不然都不止DOM是干嘛的  <div id="label-import" class="label-import" > <span style="color: #FFFFFF;margin-left: 10px;">批量导入</span>  <div id="import_dingbu"> <a href = "javascript:void(0)" onclick = "closeImport()" id="import_dingbu_close"><img src="img/03_part/tk_button_close_press.png" style=""></a> </div>   <div id="import

Excel size decreases on resaving using docx4j library implementation

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问题 When i generate excel using below code the file size is 79kb. (STEP 1) If i open the excel, do nothing and save it. The file size decreases to 33kb. (STEP 2) What could be reason for it and how can i avoid this? After extracting the excels i obeserved that theres size variation for drawing.xml's. Step 2 Xml is formatted and has leading and trailing spaces. Where as Step 1 xmls are TRIMMED . I have used DOC4j library for the implementation. After resaving the file size decreases. ` public

FileOutputStream (Apachhe POI) taking too long time to save

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问题 When I am edit a .xlsx file using Apache poi, its taking too long to save. The .xlsx file contains, formulas formatting and freeze pane. I am using the following code, try { FileInputStream file = new FileInputStream(new File(path)); XSSFWorkbook fWorkbook = new XSSFWorkbook(file); XSSFSheet fSheet = fWorkbook.getSheetAt(0); for(int i = 0; i < jTable1.getRowCount(); i++){ if(jTable1.getModel().getValueAt(i, index1).equals("1")){ XSSFCell cell = fSheet.getRow(i+1).getCell(index1); cell

微软发布了免费的文件恢复工具！

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误删文件这事相信大家都碰到过，比如不小心误删了一个重要的文件，一不留神就把自己的硬盘清空了，或者是面对已经被误删的文件手足无措......以前碰到这种情况，有实力的程序员们就靠实力恢复误删的文件，像猿妹这样没实力的，网上购买个小工具也可以帮我恢复，就是费钱。现在好了，最近微软在 Windows 10 应用商店中上架了一款免费的数据删除恢复工具 Windows File Recovery，猿妹再也不用担心误删文件了。 Windows File Recovery基于命令行程序设计，大小仅有8.26MB，所有Windows 10用户均可免费下载使用。无论是照片、文档、视频还是其他，Windows File Recovery都可以帮你恢复，而且它还支持机械硬盘、固态硬盘、U盘、SD卡等多种硬件类型，遗憾的是，不支持网络驱动器文件恢复。下面还是一起来看看用法吧：嵌入式专栏 1 下载安装首先，通过下载链接打开“Windows File Recovery”的下载界面，点击“获取”按钮安装。（下载地址：https://www.microsoft.com/zh-cn/p/windows-file-recovery/9n26s50ln705?activetab=pivot:overviewtab）这里需要提醒大家的是，安装Windows File Recovery操作系统要求Windows

R XLConnect: loadWorkbook warnings - “An illegal reflective access operation has occurred”

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问题 I am using XLConnect to read in xlsx files in R (version 3.4.4), but I get the warnings below. I think they might be related to Java, but I am not a Java user, and I do not know how to make them go away. Thanks! MWE with any xlsx file: library(XLConnect) infile <- 'any.xlsx' wb <- loadWorkbook(infile) mydf <- readWorksheet(wb, sheet=1, region='A1:AS91', header=TRUE, check.names=FALSE, useCachedValues=TRUE) WARNINGS: WARNING: An illegal reflective access operation has occurred WARNING: Illegal