jsp 点击一个按钮要它执行<% %>里面的代码
如果jsp里面有
<%
BufferedReader br = null;
try {
br = new BufferedReader(new FileReader("E://b.txt"));
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
%>
<input type="button" value="修改" />
当点击修改按钮是条用<% ... %>应该怎么做??