When I try overwrite existing excel file, I get this error message: By the way, there is no problem if I try write a new excel file.So Its working correctly but I can’t update existing file. What am I doing wrong? There is my code: Answer Multiple issues in your code. If you are creating an OPCPackage or a XSSFWorkbook
Tag: excel
Reading Excel File Column in Java
I have a sample of Excel data that needs to be read and store in the database. Example: I have tried to use Apache POI in reading data by row. But how do I get the Name and the amount from the column at the same time? Something like this Any help would be appreciated. Thanks Answer Result:
Apache POI – Is there a way to count occurrence of a string in a pivot table?
I am using version 4.1.2 of Apache Poi and I have this dataset: I’m trying to create a pivot table using Apache POI that groups and counts the occurrence of strings from the 2nd column. I’ve tried: But it somehow still counts the occurrences from the first column. The pivot table I’m trying to create: and the pivot table that
How to convert a PDF to a JSON/EXCEL/WORD file?
I need to get data from the pdf file with its header for further comparing with DB data I tried to use the pdfbox , google vision ocr , itext, but all libraries gave me a row without structure and headers. Example: DatenNumbernStatusn12122020n442334delivered I will trying convert pdf to excel/word and get data from them, but for this realisation i
How to download an excel file in Spring RestController
I am using Apache POI to generate .xlsx file. I would like to return that file from Spring controller. Here’s what I’ve done so far: Controller: Is it possible to return actual excel file from rest controller so user can download it to his computer ? As for now controller returning byte[] but I would like to return it actual
Apache POI – Conditional formatting – need to set different cell range for rule and formatting
I am trying to create an empty excel template using apache poi java. I need to add a rule – when column no. 3 is populated then columns from 7 to 12 need to be highlighted in some color (as a mandatory indicator for the user). I could find below code which colors the cell when the condition is met
Apache POI java.lang.NoSuchMethodError
My code is below: And the error code I get is: The dependencies for Apache that I have added to my netbeans library are: And from here I pretty much have no idea what to do. Can anyone tell me if my code is wrong or what other dependencies I need? Answer Ok, so as rgettman explained, I had to
Apache POI Excel row color is only black and doesn’t change
I am trying to make excel files background one row white and other aqua color. But for some reason whatever I do the color always changes to black. It doesn’t change whatever I do, even if I try GREY_25_PERCENT its completely black. Here’s picture of my excel file Answer It may seem counterintuitive, but using in combination with sets the
Not able to set custom color in XSSFCell Apache POI
I am trying to set some custom(from hexcode or rgb value) color to a xssfcell.But the color of the cell is becoming black even though I am giving some other color.I have tried doing this by the following ways : //END of the program I tried many other ways mentioned in answers to related questions but none of those solved
insert data stored in array list in excel using java
Its been a while i m trying to create a excel sheet to store the crawled data in a table format in a excel , the data is fetched from a url and stored in a array list , this data is needed to be stored in a array list ` Answer Your code is globally correct it has only