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  public ActionForward login(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response)  {
 LazyValidatorForm userForm = (LazyValidatorForm) form;
log.info("UserAction:验证用户登录");
//得到用户名和密码
String username = (String) userForm.get("username");
String password = (String) userForm.get("password");
Map<String,Object> userMap = new HashMap<String,Object>();
userMap.put("userName", username);
userMap.put("userPassword", password);
//设置Cookie
int cookieDate = Integer.parseInt(userForm.get("cookieDate").toString());
if(cookieDate != 0)
  {
Cookie cookie1 = new Cookie("username",username);
Cookie cookie2 = new Cookie("password",password);
if(cookieDate == 1)
{
//一天
cookie1.setMaxAge(60 * 60 * 24);
cookie2.setMaxAge(60 * 60 * 24);
 }
if(cookieDate == 2)
{
//一个月
cookie1.setMaxAge(60 * 60 * 24 * 31);
cookie2.setMaxAge(60 * 60 * 24 * 31);
}
if(cookieDate == 3)
{
//一年
cookie1.setMaxAge(60 * 60 * 24 * 365);
cookie2.setMaxAge(60 * 60 * 24 * 365);
}
//把捕获来的cookies添加到响应里
response.addCookie(cookie1);
response.addCookie(cookie2);
}
User user = null;
//验证用户名和密码
if(userManager.createCriteria(Restrictions.allEq(userMap)).list().size() > 0)
{
log.info("UserAction:登录成功");
user = (User) userManager.createCriteria(Restrictions.allEq(userMap)).list().get(0);
request.getSession().setAttribute("user", user);
return mapping.findForward("success");
}
else
{
this.saveMessage(request, "login.error", "用户名或密码错误");
log.info("UserAction:登录失败");
request.setAttribute("error","username or password is wrong");
return mapping.getInputForward();
}
 }
登录前的跳转:
/** *//**
* 登录前的跳转
* @param mapping
* @param form
* @param request
* @param response
* @return
*/
public ActionForward forwardlogin(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) {
log.info("UserAction:登录前的跳转，Cookie处理");
//取出cookies
Cookie[] cookies = request.getCookies();
String username = null;
String password = null;
if(cookies.length != 0)
{
for(int i = 0; i < cookies.length; i ++)
{
//根据key取出值
if(cookies[i].getName().equals("username"))
{
username = cookies[i].getValue();
}
if(cookies[i].getName().equals("password"))
{
password = cookies[i].getValue();
}
}
}
request.setAttribute("username", username);
request.setAttribute("password", password);
return mapping.findForward("login");
}
前台:
 <form action="${ctx}/user.do?method=login" method="post" onsubmit="return check();">
<table cellpadding=0 cellspacing=0 border=0 width=98%
bgcolor=#0099cc align=center>
<tr>
<td>
<table cellpadding=6 cellspacing=1 border=0 width=100%>
<tr>
<td bgcolor=#99ccff valign=middle colspan=2 align=center>
<!-- 判断用户名或密码是否错误 -->
<logic:empty name="error" scope="request">
<font color="green"><b>请输入您的用户名、密码登陆</b></font>
</logic:empty>
<logic:notEmpty name="error" scope="request">
<bean:message key="login.error"/>
</logic:notEmpty>
</td>
</tr>
<tr>
<td bgcolor=#f2f8ff valign=middle>
请输入您的用户名
</td>
<td bgcolor=#f2f8ff valign=middle>
<INPUT value="${requestScope.username}" name="username" type=text id="username" onblur="return check();">
<a href="${ctx}/main/common/reg.jsp">没有注册？</a>
</td>
<!-- 用户名错误提示信息 -->
<td id="username_info" style="color:red;position: absolute;left:550px;top:235px;"></td>
</tr>
<tr>
<td bgcolor=#f2f8ff valign=middle>
请输入您的密码
</td>
<td bgcolor=#f2f8ff valign=middle>
<INPUT value="${requestScope.password}" name="password" type=password id="password" onblur="return check();">
<a href="lostpass.jsp">忘记密码？</a>
</td>
<!-- 密码错误提示信息 -->
<td id="password_info" style="color:red;position: absolute;left:550px;top:270px;"></td>
</tr>
<tr>
<td bgcolor=#f2f8ff valign=top width=30%>
<b>Cookie 选项</b>
<BR>
请选择您的Cookie保存时间<br>
下次访问可以方便输入<br><br />
<a href="#" onclick="clearCookie();" style="color:green;">清空Cookies</a>
<div id="cookie_info" style="color:maroon;position: absolute;left:100px;top:360px;"></div>
</td>
<td bgcolor=#f2f8ff valign=middle>
<input type="radio" id="cookieDate" name="cookieDate" value="0" checked>
不保存，关闭浏览器就失效
<br>
<input type="radio" id="cookieDate" name="cookieDate" value="1">
保存一天
<br>
<input type="radio" id="cookieDate" name="cookieDate" value="2">
保存一月
<br>
<input type="radio" id="cookieDate" name="cookieDate" value="3">
保存一年
<br>
</td>
</tr>
<input type=hidden name=comeURL
value="#" />
<tr>
<td bgcolor=#99ccff valign=middle colspan=2 align=center>
<input type=submit name="submit" value="登 陆">
</td>
</tr>
</table>
</td>
</tr>
</table>
</form>
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