a 页面有个 button 跳转到 http://127.0.0.1/b.jsp?id=100
在b.jsp
<script type="text/javascript">
var id = "${id}";
alert(id);
</script>
为何alert空值 ？
------解决方案--------------------------------------------------------
http://127.0.0.1/b.jsp?id=100
这种的话可以
<script type="text/javascript">
var s = location.search.split('?')[1];
var id = s.split('=')[1];
alert(id);
</script>
------解决方案--------------------------------------------------------
var id = "${param.id}";
alert(id);