Some advice: you'll get a better response if you use a meaningful subject line. Also, in order that those for whom English is not their first language have a better chance of understanding what is posted in these forums, we ask that you refrain from using words that are not recognized English, such as "plzzzzzzzzzz". Also, you might benefit from reading this.
In short, you can't. Browsers, for security reasons, don't allow this.
What you can do, is set the Content-Type and Content-Disposition headers in such a way that the browser will prompt the user with a "Save As" dialog box.
See our JspAndExcel entry in the JSP FAQ page for an example that does this.