@Override public ActionForward list(ActionMapping mapping, ActionForm form, HttpServletRequest request,
HttpServletResponse response) {
buzzLog.info("-@Override-list---");
int ret = 1; HttpSession session = request.getSession();
String val = (String) session.getAttribute("test");
if ( val == "yes") {
super.list(mapping, form, request, response);
return mapping.findForward(LIST);
}
val取到的值是空的在用户登录的时候已经setAttribute("test","yes");
HttpServletResponse response) {
buzzLog.info("-@Override-list---");
int ret = 1; HttpSession session = request.getSession();
String val = (String) session.getAttribute("test");
if ( val == "yes") {
super.list(mapping, form, request, response);
return mapping.findForward(LIST);
}
val取到的值是空的在用户登录的时候已经setAttribute("test","yes");
if (val.equals("yes")){
super.list(mapping, form, request, response);
return mapping.findForward(LIST);
}
不是==啦...是val.equal("yes")
或者session这个会话有没有存在。
1 不知道lz判断val是空的，是不是通过这个语句判断的 if ( val == "yes") 还是通过debug判断的，改为 `"yes".equals(val)看看2 HttpSession session = request.getSession();
改为：
HttpSession session = ((HttpServletRequest) request).getSession();
看看！
ERROR [org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/aue].[action]] - <Servlet.service() for servlet action threw exception>
java.lang.NullPointerException用val == "yes"就没事改为HttpSession session = ((HttpServletRequest) request).getSession();
debug出来的 val is null
是否还是在一个session里不知如何解决这个问题
<html>
<head>
<%@ include file="/commons/meta.jsp"%>
<link href="${ctx}/styles/admin/admin.css" type="text/css"
rel="stylesheet">
<title>Login</title>
<style type="text/css">
<!--
.style1 {
color: #FFFFFF;
font-weight: bold;
}
-->
</style>
</head> <body>
<form action="commons/login.do" method="POST">
<input type="hidden" name="method" value="loginForm"/>
<input type="hidden" name="level" value="0"/>
<table width="631" height="421" border="0" align="center" background="pics/shot_login.jpg">
<tr>
<td width="310" height="95"> </td>
<td width="311"> </td>
</tr>
<tr>
<td height="320"> </td>
<td><table width="100%">
<tr>
<td height="26" colspan='2'><div align="center" class="style1">Login</div></td>
</tr>
<tr>
<td height="27"><span class="style1"> User ID: </span></td>
<td><input name='number' type='text' id="number">
</td>
</tr>
<tr>
<td height="25"><span class="style1"> Password: </span></td>
<td><input name='password' type='password' id="password">
</td>
</tr>
<tr>
<td height="30"> </td>
<td></td>
</tr>
<tr>
<td colspan='2'><div align="center">
<input name="submit" type="submit" value="Submit">
</div></td>
</tr>
</table></td>
</tr>
</table>
</form> </body>
</html>
LoginAction.java
public class LoginAction extends StrutsEntityAction<User,UserManager> { @SuppressWarnings("unused")
private TypeConvert tct = new TypeConvert(); public void setUserManager(UserManager uManager) {
this.customerUser = uManager;
} public ActionForward loginForm(ActionMapping mapping, ActionForm form,
HttpServletRequest request,
HttpServletResponse response) { final Log buzzLog = LogFactory.getLog(Constants.BUSINESS_LOG);
buzzLog.info("--- LoginAction Begin ---"); String userid;
String passwd;
int userlevel;
int ret = 1; userid = request.getParameter("number");
passwd = request.getParameter("password");
userlevel = tct.stringToInt(request.getParameter("level")); ret = loginCheck(userid,passwd,request,response); String get = (String) request.getAttribute("login");
buzzLog.info("-level--"+userlevel+"-- Login number---"+get);
if (ret==0){
if ( userlevel== Constants.LEVEL_ADMIN){
buzzLog.info("---Welcom administrator----");
return mapping.findForward("adminlogin");
}
else{
buzzLog.info("---Welcom user----");
return mapping.findForward("login");
}
}
else
return mapping.findForward("loginerror");
}
public int loginCheck(String userid, String passwd,HttpServletRequest request,
HttpServletResponse response){ int ret = 1;
String hql;
String passwd2;
PasswordEncoder passwordEncoder = new Md5PasswordEncoder();
passwd2 = passwordEncoder.encodePassword(passwd, null); buzzLog.info("---Login Check Begin ---"+passwd2); hql = "from User u where u.number=? and u.passwd=?";
try {
List userList = find(hql,userid,passwd2);
if (userList!=null && userList.size() > 0) { User user = (User) userList.get(0);
String number=user.getNumber();
String name=user.getName();
String zone=user.getZone();
int level=user.getLevel(); HttpSession session = request.getSession();
if (session == null)
buzzLog.info("---session is null ---");
session.setMaxInactiveInterval(6000);
session.removeAttribute("login");
session.removeAttribute("zone");
session.removeAttribute("level"); request.setAttribute("number", number);
request.setAttribute("name", name);
request.setAttribute("zone", zone);
request.setAttribute("level", level);
request.setAttribute("login", "yes");
request.setAttribute("test", "yes");
ret = 0;
}
}
catch(Exception e){
buzzLog.info("---find error ---");
e.printStackTrace();
ret = -1;
}
return ret;
}
}
<%@ page contentType="text/html;charset=UTF-8" %>
<%@ include file="/commons/taglibs.jsp" %><html>
<head>
<link href="${ctx}/styles/admin/admin.css" type="text/css" rel="stylesheet">
<%@ include file="/commons/meta.jsp" %>
<title> Welcome to System.</title>
<META content=JavaScript name=vs_defaultClientScript>
</head>
<SCRIPT> function switchBar(){
if (switchPoint.innerText==""){
switchPoint.innerText=" "
document.all("leftFrame").style.display="none"
}else{
switchPoint.innerText=""
document.all("leftFrame").style.display=""
}}
function ComfirmExit(action){
if(action==1)
{
myconfirm = confirm("确实要关闭窗口,退出系统吗？");
if (myconfirm==true){
top.location.href="CloseWin.aspx?Action=1";
}
}
if(action==2)
{
myconfirm = confirm("确实要重新登陆吗？");
if (myconfirm==true){
top.location.href="CloseWin.aspx?Action=2";
}
}
} </SCRIPT><STYLE type=text/css>.navPoint {
FONT-SIZE: 12px; CURSOR: hand; COLOR: white; FONT-FAMILY: Webdings
}
</STYLE><BODY bottomMargin=0 leftMargin=0 topMargin=0 rightMargin=0 scroll="no">
<TABLE id=Table1 height="100%" cellSpacing=0 cellPadding=0 width="100%"
border=0>
<TBODY>
<TR>
<TD style="HEIGHT: 50px" align=right colSpan=3>
<TABLE id=Table3 cellSpacing=0 cellPadding=0 width="100%" border=0>
<TBODY>
<TR>
<TD style="WIDTH: 291px" width=300
background="../pics/middle.gif"></TD>
<TD width="100%" background=../pics/middle.gif></TD>
<TD align=right width=292
background="../pics/middle.gif"><IMG height=68
src="../pics/lefttitle.gif" width=292 useMap=#Map
border=0></TD></TR></TBODY></TABLE></TD></TR>
<TR>
<TD id=leftFrame style="WIDTH: 164px" vAlign=center noWrap align=middle
name="leftFrame"><IFRAME id=carnoc style="WIDTH: 164px; HEIGHT: 100%"
name=carnoc src="left.jsp" frameBorder=0
scrolling=yes></IFRAME></TD>
<TD style="WIDTH: 9pt" bgColor=#6699cc>
<TABLE id=Table2 height="100%" cellSpacing=0 cellPadding=0 border=0>
<TBODY>
<TR>
<TD title=打开/关闭全屏 style="WIDTH: 4px; CURSOR: hand; HEIGHT: 100%"
onclick=switchBar() vAlign=top
background="../pics/middlebgpic.gif"><IMG
src="../pics/middletop.gif">
<BR><BR><BR><BR><BR><BR><BR><BR><BR><SPAN id=switchPoint
title=打开/关闭全屏></SPAN><IMG src="../pics/middledot.gif">
</TD></TR></TBODY></TABLE></TD>
<TD style="WIDTH: 100%">
<TABLE height="100%" cellSpacing=0 cellPadding=0 width="100%" border=0>
<TBODY>
<TR>
<TD><IFRAME id=main
style="VISIBILITY: inherit; WIDTH: 100%; HEIGHT: 100%" name=main
src="main.jsp" frameBorder=0
scrolling=yes></IFRAME></TD></TR>
<TR>
<TD bgColor=#ff6633 height=20><IFRAME
src="../getReference.htm" frameBorder=0
width="100%" scrolling=no
height="100%">
</IFRAME>
</TD>
</TR>
</TBODY>
</TABLE>
</TD>
</TR>
</TBODY>
</TABLE>
</FORM>
</body>
</html>其中的main.jsp
<%@ include file="/commons/taglibs.jsp" %>
<%@ page contentType="text/html;charset=UTF-8" isErrorPage="true" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %><html>
<head>
<%@ include file="/commons/meta.jsp" %>
<link href="${ctx}/styles/admin/admin.css" type="text/css" rel="stylesheet">
</head>
<body>
<c:redirect url="/aue/calendar.do"/>
</body>
</html>calendar.do对应的CalendarAction.java
public class CalendarAction extends StrutsEntityAction<Calendar, CalendarManager> {
@SuppressWarnings("unused")
private CalendarManager calendarManager;
private CustomerManager custm = new CustomerManager(); public void setCalendarManager(CalendarManager calManager) {
this.calendarManager = calManager;
} private static final Log buzzLog = LogFactory.getLog(Constants.BUSINESS_LOG); @Override public ActionForward list(ActionMapping mapping, ActionForm form, HttpServletRequest request,
HttpServletResponse response) {
buzzLog.info("-@Override-list---");
int ret = 1; ret = custm.check("login", request);
buzzLog.info("-st---"+request.getAttribute("login")); if (ret == 0){
super.list(mapping, form, request, response);
// request.setAttribute(getEntityListName(), calendarManager.doFind("6fish"));
return mapping.findForward(LIST);
}
else
return mapping.findForward("accessDenied"); }
public int check(String attribute,HttpServletRequest request){
int ret = 1;
String val;
HttpSession session = ((HttpServletRequest) request).getSession();
if (session == null)
buzzLog.info("---session is null ---");
val = (String) session.getAttribute(attribute);
if (attribute == "login" && val == "yes")
ret = 0;
if (attribute == "test" && val == "yes")
ret = 0; buzzLog.info("- check--"+attribute+" is "+val+" ret="+ret);
return ret;
}
String str = (String)request.request.getSession().getAttribute("user_id");
存的时候：
request.getSession().setAttribute("user_id", "123");
应该是：
我在action 里就是这么接的：
String str = (String)request.getSession().getAttribute("user_id");
存的时候：
request.getSession().setAttribute("user_id", "123");
request.setAttribute("test", "yes");val = (String) session.getAttribute(attribute);-----------------------------------------------------
存在reqeust中，去session中能取到才怪。-----------------------------------------------------
<c:redirect url="/aue/calendar.do"/>这句话，重定向了，不在同一session内。