Dynamic Image in JSP

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Java

JSP

Hello everyone i am explaining my full problem here. We have some temperature sensing devices in which each device generate separate text file.

The last update of the text file i have to show in a circle e.g. 8 devices are in working then there will be 8 text files there will be 8 images on which i have to show data of text files.

I am completed with logic, now the problem is how to draw dynamic image and how to store it and how to show it and it has to be implemented on web.

Help me if you have any idea about it.

Thanks in advance

Regards
Tarun