下面是staticResources.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
    <script src="js/jquery-1.8.3.js"/>
    <title>Title</title>
    <script>
        $(function(){
           $("#btn").click(function(){
               alert("123");
    </script>
</head>
    <button id="btn">按钮</button>
</body>
</html>