struts 登录怎样alert出错误信息出来呢
struts 登录怎样alert出错误信息出来呢
？
要有消息框弹出提示的.
[解决办法]
这个容易，你会写JS的把
我的public ActionForward execute(
ActionMapping mapping,
ActionForm form,
HttpServletRequest request,
HttpServletResponse response) {
AdminLoginForm adminlog=(AdminLoginForm)form;
try {
//User user = this.serviceLocator.getUserService().login(this.username, this.password);
CheckUserModule module=new CheckUserModule();
module.setName(adminlog.getUsername());
module.setPassword(adminlog.getPassword());
List list=userManager.getListByName(module);
//判断用户名是否为空
if(list==null||list.size()==0){
throw new UsernameNotExistException(adminlog.getUsername());
}
Users user=(Users)list.get(0);
module.setId(user.getUserid());
LoginUserModel loginUserModel=new LoginUserModel();
loginUserModel.setName(user.getUsername());
loginUserModel.setPassword(user.getPassword());
if (user.getPassword().equalsIgnoreCase(adminlog.getPassword())) {
List RolemoduleList=new ArrayList();
//取得SESSION把用户的信息放入session
HttpSession session = request.getSession(false);
session.setAttribute( "authorization ",loginUserModel);
session.setAttribute( "userDetail ",user);
//写日志
try{
String userip = request.getRemoteAddr();
Logger optlogger = Logger.getLogger( "OpterateLog. " + ". " + user.getName()+ ". " + userip);
Logger syslogger = Logger.getLogger( "SystemLog. " + "后台用户登录 ");
}catch(Exception e){
e.printStackTrace();
//String msg = "写日志异常 ";
//FacesUtils.addErrorMessage(msg + ", 请联系管理员。 ");
//return NavigationResults.RETRY;
}
return mapping.findForward(SUCCESS);
}
else {
String msg = "密码错误, 请重试。 ";
request.setAttribute( "msg ",msg);
request.setAttribute( "username ",adminlog.getUsername());
return mapping.findForward(ERROR);
}
}catch(UsernameNotExistException ue){
ue.printStackTrace();
String msg = "不存在的用户名, 请重试。 ";
request.setAttribute( "msg ",msg);
request.setAttribute( "username ",adminlog.getUsername());
return mapping.findForward(ERROR);
}
catch (Exception e) {
e.printStackTrace();
String msg = "系统发生异常, 请联系管理员。 ";
request.setAttribute( "msg ",msg);
request.setAttribute( "username ",adminlog.getUsername());
return mapping.findForward(ERROR);
}
}
[解决办法]
通过forward以后，在request中会保存一个 "msg "的值，你在页面中用js进行判断一下应该就可以了吧！
[解决办法]
public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) {
LoginForm loginForm = (LoginForm) form;
String username = loginForm.getUsername();
String userpwd = loginForm.getUserpwd();
response.setCharacterEncoding( "gbk ");
HttpSession session=request.getSession();
String validate= " ";
List list = null;
String realname = " ";
String departmentname = " ";
String post = " ";
String usergrade = " ";
validate=dao.ByUsernameQueryValidate(username);
if(dao.ValidatePwd(username, userpwd)==1&&!validate.equals( "离职 ")){
session.setAttribute( "username ", username);
list = dao.ByUsernameQueryUser(username);
if(list!=null&&list.size()!=0){
User uo = (User)list.get(0);
realname = uo.getRealname();
departmentname = ddao.findColumnById(uo.getDepartmentid());
post = pdao.findPostById(uo.getPostid());
usergrade = uo.getUsergrade();
}
session.setAttribute( "realname ", realname);
session.setAttribute( "departmentname ", departmentname);
session.setAttribute( "post ", post);
dao.Loginnum(username);
try {
PrintWriter out = null;
out = response.getWriter();
out.print( " <script> ");
out.print( "document.location.href= 'index.do '; ");
out.print( " </script> ");
out.flush();
} catch (IOException e) {
// TODO 自动生成 catch 块
e.printStackTrace();
}
// return mapping.findForward( "success ");
return null;
}else{
PrintWriter out = null;
try {
out = response.getWriter();
out.print( " <script> ");
out.print( "alert( '用户名或密码错误或您未通过验证，请重新登录！ '); ");
out.print( "window.open( 'login.jsp ', '_self '); ");
out.print( " </script> ");
out.flush();
} catch (IOException e) {
// TODO 自动生成 catch 块
e.printStackTrace();
}
return null;
}
}
