<form method="post" action="filedownload.jsp"  accept-charset=CP1251>
				<select name="id">
					<c:forEach items="${programList}" var="program">
						<option value="<c:out value="${program.id}"/>">
						    <c:out value="${program.name}"/>
						</option>
					</c:forEach>
				</select>
				<input type="submit" value="Скачать"/>
			</form>

                       MyClass.copyProgramToInstaller(prog, filepath);

        File file= new File(getTemporaryFolder(), "prog.exe");
        if (!file.exists()) {
            throw new IllegalArgumentException("Файл " + file.getAbsolutePath() + " не найден.");
        }