问题遇到的现象和发生背景
out.println(""+session.getAttribute("userID"));
if(session.getAttribute("userID")=="admin"){ %>
<a href="delete.jsp">删除留言界面</a>
<%}else
{%>
1
<% }%>
out.println(""+session.getAttribute("userID"));
if(session.getAttribute("userID")=="admin"){ %>
<a href="delete.jsp">删除留言界面</a>
<%}else
{%>
1
<% }%>
if (session.getAttribute("userID").equals("admin")) {
} else {
}
试试这个判断