您需要在所有三个按钮上设置url，例如

Your need to set url on all three button like

<button class='button1' data-url='button1.txt'>button 1</button>
<button class='button2' data-url='button2.txt'>button 2</button>
<button class='button3' data-url='button3.txt'>button 3</button>

在那之后，在您的ajax上.

After That on your ajax.

<script>
$(document).ready(function(){
$(".button1, .button2, .button3").click(function(){
var url = $(this).attr('data-url');
    $.ajax({
        url: url", 
        /*more code*/
    });
});
});