一个 null 的问题,请帮忙,多谢,在线等
public String check_login(HttpServletResponse httpservletresponse, HttpSession httpsession, String s , String prelink)
{
String userid = String.valueOf(httpsession.getAttribute("session_userid")); // 输出为 null
String linkurl = s.concat("index.php?session_prelink=") + prelink;
String test = "No";
try
{
if(userid == null || userid.equals("")) { // 但这里不执行下面的代码
httpservletresponse.sendRedirect(s);
test = "ok";
}
}
catch (Exception ex)
{
LogManage.log(ex,"check_login",HyLog.ERROR,"CheckUser.java");
}
return test;
}