How develop a price comparison site
<p>I want to develop a  price comparison website using java like and price echo ,my question is how can i get date from other online e-commerce websites so as to put it in my date base And is java a good choice ?please suggest a good technology to develop. 
   And it would be helpful ,if you can give few tips to and tricks to develop my website.
                                                                         Thankyou</p>
