How to Upload CSV file using JSP and servlet into Java DB

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Java

JSP

CSV

servlet

I am new to Java programming & in a project I want to upload CSV file using JSP and servlet save into Java DB.... Also there is a requirement that we don't know the size of file & number of columns & rows in advance before uploading file So, code for reading columns from file would be generic.... Can anybody suggest me how to code it !

Here is the JSP code to get file...now want to read this file using servlet and save into JavaDB

<form name="uploadForm" action="FileUpload.java" method="POST"    enctype="multipart/form-data">
    <input type="file" name="file" value="file" size="20" />
    <br/><br/>
    <input type="submit" value="Submit" name="submit" />
</form>