//驗(yàn)證代碼@Override?? ?public void validate() {?? ??? ?//用戶名不能為空?? ??? ?if("".equals(u.getUsername())){?? ??? ??? ?this.addFieldError("usernameError", "用戶名不能為空！");?? ??? ?}?? ??? ?if(u.getPassword().length()<6){?? ??? ??? ?this.addFieldError("password", "密碼長(zhǎng)度不能少于6位！");?? ??? ?}?? ?}//登錄方法@SkipValidation?? ?public String login(){?? ??? ?UsersDao udao=new UsersDaoImpl();?? ??? ?if(udao.usersLogin(u)){?? ??? ??? ?//在session中保存?? ??? ??? ?session.setAttribute("loginUserName", u.getUsername());?? ??? ??? ?return "login_success";?? ??? ?}else?? ??? ??? ?return "login_failure";?? ?}//struts配置<package name="users" namespace="/users" extends="default">?? ??? ?<action name="*_*" class="action.{1}Action" method="{2}">?? ??? ??? ?<result name="input">/users/Users_login.jsp</result>?? ??? ??? ?<result name="login_success">/users/Users_login_success.jsp</result>?? ??? ??? ?<result name="login_failure">/users/Users_login.jsp</result>?? ??? ??? ?<result name="logout_success">/users/Users_login.jsp</result>?? ??? ?</action>?? ?</package>有哪里有問題嗎