How to Read excel or .csv files in java

I am writing a program which takes input as excel or .csv file.
How to read these files.
Any API's are existed or need to use the third party jar.
Please suggest me.
Thanks & Regards

Did you search in google? Did you search here? There are so many excel related questions here, including answers about third party libraries.
I have the impression that you didn't research at all.
_[How to ask questions|http://faq.javaranch.com/view?HowToAskQuestionsOnJavaRanch]_ It's the same here.

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09 Jun 2009 15:27:47,806 [DEBUG] - [ com.vat.website.utils.PropertyCache ] [ static Object getValue(String propertyName, String propertyFileName)
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* REVISIONS:
* Author Date Description
* S.Stadnik 12/12/07 Initial
* PARAMETERS
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* OUTPUT : None.
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Yes, I agree.
That was written for a particular case:
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Hello everyone,
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1. In the bunch of these 50 CSV files there will be some exception for which we first need to purge the tables and then insert the data. Meaning for 2 files out of 50, we need to first clean the tables and then perform
data insert, while for the rest 48 files, they should be appended on daily basis.
Can you please advise what is the best way to achieve this requirement? Where should we configure such exceptional cases for the package?
How can you identify these files? Is it based on file name or are there some info in the file which indicates
that it required a purge? If yes you can pick this information during file name or file data parsing step and set a boolean variable. Then in control flow have a conditional precedence constraint which will check the boolean variable and if set it will execute
a execte sql task to do the purge (you can use TRUNCATE TABLE or DELETE FROM TableName statements)
2. For some of the CSV files we would be having more than one file with the same name. Like out of 50 the 2nd file is divided into 10 different CSV files. so in total we're having 60 files wherein the 10 out of 60 have
repeated file names. How can we manage this criteria within the same loop, do we need to do one more for each looping inside the parent one, what is the best way to achieve this requirement?
The best way to achieve this is to append a sequential value to filename (may be timestamp) and then process
them in sequence. This can be done prior to main loop so that you can use same loop to process these duplicate filenames also. The best thing would be to use file creation date attribute value so that it gets processed in the right sequence. You can use a
script task to get this for each file as below
http://microsoft-ssis.blogspot.com/2011/03/get-file-properties-with-ssis.html
3. There will be another package, which will be used to purge data for the SQL tables. Meaning unlike the above package, this package will not run on daily basis. At some point we would like these 50 tables to be purged
with older than criteria, say remove data older than 1st Jan 2015. what is the best way to achieve this requirement?
You can use a SQL script for this. Just call a sql procedure
with a single parameter called @Date and then write logic like below
CREATE PROC PurgeTableData
@CutOffDate datetime
AS
DELETE FROM Table1 WHERE DateField < @CutOffDate;
DELETE FROM Table2 WHERE DateField < @CutOffDate;
DELETE FROM Table3 WHERE DateField < @CutOffDate;
GO
@CutOffDate which denote date from which older data have to be purged
You can then schedule this SP in a sql agent job to get executed based on your required frequency
Please Mark This As Answer if it solved your issue
Please Vote This As Helpful if it helps to solve your issue
Visakh
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