I've been googling and I've not found one example for this.
I am able to extract the contents for a DOCX file but so far no clue how to get the contents of an EXCEL file.
I know you use
SpreadsheetMLPackage spreadsheetMLPackage = SpreadsheetMLPackage.load(file);
to load the file, but I don't know how to proceed from here. I've check whatever methods SpreadsheetMLPackage has but nothing has gotten me the contents.
First you need to understand the structure of a xlsx file.
Unzip one, or run it through the docx4j webapp.
For how the parts relate to one another, see:
http://openxmldeveloper.org/blog/b/openxmldeveloper/archive/2007/08/13/1970.aspx
I guess the key method you'll want is getWorksheet
But first you'll need to get the WorkbookPart; do that with spreadsheetMLPackage.getWorkbookPart()
Related
I am basically trying to write to a csv file, one of the cells in that csv file will contain multiple lines but one cell. I have read online that if you wrap it around "" you will generally be fine. This is the case in finder, however when I try to open it in excel it does not work that way what is your suggestion
Try to use this tutorial.
https://www.baeldung.com/apache-commons-csv
But, post your code to more detailed response
I have to read a text file and write it to an already existing excel file. The excel file is a customized excel sheet with different items in different columns. The items has different values for each of them... These items with there value can be found in a text file. But i dont have much idea as to how to do this.
E.g- example.txt
Name: John
Age=24
Sex=M
Graduate=M.S
example.xlsx
Age: Sex:
Name: Graduate:
Thanks in advance :)
Just as for so many other problems that need solved, there's an Apache library for that! In this case, it's the POI library. I've only used it for very basic spreadsheet manipulation, but managed that by just following a few tutorials. I'd link to one, but I can't now remember where it was.
Please see Apache POI-HSSF library for reading and writing Excel files with Java. There are some quick guides to get you started.
This post How to read and write excel file in java might help you.
You can also create a *.csv (comma separated value) file in Java. Just create a simple text file with CSV extension and put your values in there like that :
Age:,24,Sex:,M,
So you just separate your values with commas (or other delimiters like ';').
Every line in this file is a row, and every delimiter separates two columns. You won't be able to add colours/styles/formatting this way, but it gives you a file that is openable and understandable even without Excel (or other spreadsheet software).
I want to read the content of any files like doc, pdf, ppt etc section or paragraph wise in java, because i want to retrieve a particular section of a file (if have) instead of retrieving the content of whole file.. Please can anyone tell me, How can i read the content of any file either section or paragraph wise………..
Thanks
This depends entirely on the format of the file in question. For example, when you have a .docx file, you can employ some XML parser and then iterate through the result or use XPath to find all paragraphs, sections or whatever you wish to extract.
For other file formats you will have to find a different approach. There is no single way to extract a specific part of any file, as different file types have different ways of storing data. Most likely, you will have to collect a bunch of libraries, one for each file type.
I want to read the value in quickfixj .seqnums file and write that value in another file or overwrite existing value with another value using java.i am beginner in java tell me how i can do this my boss give me the task.help me
We're not going do your job for you, but here is a set of steps:
Open the file (it's a text file - if you'd bothered to cat the file you would have seen)
There are two numbers - figure out which is which
Update as required
Write the new values in the same format to the file.
I want to make a .properties file to use instead of numerous cookies. I have been trying to figure out how to do this by googleing, but maybe I'm just missing something or not looking for the right thing.
This will eventually be user based, so I wanted to know if I could get it to create a new file based on the user's login, but every beginners guide I find seems to say just make a text file by hand.
Could someone provide me with a page that explains how to do this well, or give me the basic code that I'll need to get me started.
And also what code I need to add new key,value's to the file and how to get the values from it.
Take a look at Properties.list. Using this method you can easily write properties into an OutputStream and with help of ByteArrayOutputStream you can convert theese properties into a string.
To read properties from a file use Properties.load.
Unfortunately there's no standard Java API to just add or remove a property from a file - you'll have first to load the whole file into a Properties instance and then save it back into the file after you made the required changes using Properties.setProperty.
java.util.Properties has load and store methods that will read and write the properties for you. In that case you just add to the Properties map and then store it to an OutputStream or a Writer.
For doing it user based, you would need a directory to store it in and then base the file name on the user name or id, but make sure it is safe for a file name.