xssf

Excel Cell Style issue

由 拜拜、爱过 提交于 2019-11-27 05:33:31
I am using below code to get date value from XLSX file. This is working absolutely fine for some xlsx file . But It is not giving exact date format which is in xlsx file. This issue is for some file. eg; I have date like this 21/01/2016 (dd/mm/yyyy) but after reading, it gives date as 01/21/16(mm/dd/yy) Is there any other way to get cellstyle? Is it issue of xlsx file?? String dateFmt = cell.getCellStyle().getDataFormatString(); if (DateUtil.isCellDateFormatted(cell)) { double val = cell.getNumericCellValue(); Date date = DateUtil.getJavaDate(val); String dateFmt = cell.getCellStyle()

How to load a large xlsx file with Apache POI?

由 旧城冷巷雨未停 提交于 2019-11-26 19:49:00
I have a large .xlsx file (141 MB, containing 293413 lines with 62 columns each) I need to perform some operations within. I am having problems with loading this file ( OutOfMemoryError ), as POI has a large memory footprint on XSSF (xlsx) workbooks. This SO question is similar, and the solution presented is to increase the VM's allocated/maximum memory. It seems to work for that kind of file-size (9MB), but for me, it just simply doesn't work even if a allocate all available system memory. (Well, it's no surprise considering the file is over 15 times larger) I'd like to know if there is any

Processing large xlsx file

由 守給你的承諾、 提交于 2019-11-26 18:39:21
I need to auto-fit all rows in large (30k+ rows) xlsx file. The following code via apache poi works on small files, but goes out with OutOfMemoryError on large ones: Workbook workbook = WorkbookFactory.create(inputStream); Sheet sheet = workbook.getSheetAt(0); for (Row row : sheet) { row.setHeight((short) -1); } workbook.write(outputStream); Update: Unfortunately, increasing heap size is not an option - OutOfMemoryError appears at -Xmx1024m and 30k rows is not an upper limit. markusk Try using the event API. See Event API (HSSF only) and XSSF and SAX (Event API) in the POI documentation for

Limitation while generating excel drop down list with Apache POI

由 倾然丶 夕夏残阳落幕 提交于 2019-11-26 15:58:30
问题 I'm trying to generate an excel file with some validations, I've read the poi dev guides for implementing it. During implementation, I got an exception ( String literals in formulas can't be bigger than 255 characters ASCII ). POI concatenates all drop down options into '0' deliminated string and checking its length and giving me exception. :( I'm using latest version of POI 3.8 beta 5. And my code is: try { HSSFWorkbook wb = new HSSFWorkbook(); HSSFSheet sheet = wb.createSheet("new sheet");

Apache POI error loading XSSFWorkbook class

由 余生长醉 提交于 2019-11-26 05:34:50
问题 I\'m trying to write a program that works with Excel docs, but the HSSF format is too small for my requirements. I\'m attempting to move to XSSF, but I keep getting errors when trying to use it. I managed to solve the first two by adding xmlbeans-2.3.0.jar and dom4j-1.6.jar to my program, but now this error is coming up, which doesn\'t seem to be resolved by adding the Apache commons jar available on the Apache website. The error is as follows: Exception in thread \"main\" java.lang

Processing large xlsx file

由 瘦欲@ 提交于 2019-11-26 04:41:45
问题 I need to auto-fit all rows in large (30k+ rows) xlsx file. The following code via apache poi works on small files, but goes out with OutOfMemoryError on large ones: Workbook workbook = WorkbookFactory.create(inputStream); Sheet sheet = workbook.getSheetAt(0); for (Row row : sheet) { row.setHeight((short) -1); } workbook.write(outputStream); Update: Unfortunately, increasing heap size is not an option - OutOfMemoryError appears at -Xmx1024m and 30k rows is not an upper limit. 回答1: Try using
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