Ok, now I have resolved that the problem is only for Eclipse.
In Windows , I tried to run the same project in NetBeans
IDE, it ran correctly.
But, back in Linux when I try to run , the same problem persists.
I suspect the problem is of adding external jars of uploadbean , though I have added DB2 jar file correctly and it's working fine.
Here I am giving the screenshots :
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1st Screenshot
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2nd Screenshot
please help....