APEX如何通过数据库中用户信息验证登陆

create table USER_ACCOUNT

(

USER_NAME VARCHAR2(30) not null,

PASSWORD VARCHAR2(30) not null,

USER_TYPE VARCHAR2(10) not null,

ACTIVE VARCHAR2(1) not null,

EMAIL VARCHAR2(64) not null,

FULL_NAME VARCHAR2(64) not null

) ;

alter table USER_ACCOUNT

add constraint USER_ACCOUNT_PK primary key (USER_NAME) ;

alter table USER_ACCOUNT

add constraint USER_ACCOUNT_UK unique (EMAIL) ;

-----------------------------------

insert into user_account (USER_NAME, PASSWORD, USER_TYPE, ACTIVE, EMAIL, FULL_NAME)

values ('tom', 'tom123', 'admin', 'Y', 'tom@example.com', 'Tom');

insert into user_account (USER_NAME, PASSWORD, USER_TYPE,ACTIVE, EMAIL, FULL_NAME)

values ('jerry', 'jerry123', 'user', 'Y', 'jerry@example.com', 'Jerry');

insert into user_account (USER_NAME, PASSWORD, USER_TYPE,ACTIVE, EMAIL, FULL_NAME)

values ('donald', 'donald123', 'guest', 'N', 'donald@example.com', 'Donald');

Commit;

Create Or Replace Package Pkg_Security Is

Function Authenticate_User(p_User_Name Varchar2,p_Password Varchar2) Return Boolean;

-----

Procedure Process_Login(p_User_Name Varchar2

,p_Password Varchar2

,p_App_Id Number);

End Pkg_Security;

/

Create Or Replace Package Body Pkg_Security Is

Function Authenticate_User(p_User_Name Varchar2

,p_Password Varchar2) Return Boolean As

v_Password User_Account.Password%Type;

v_Active User_Account.Active%Type;

v_Email User_Account.Email%Type;

Begin

If p_User_Name Is Null Or p_Password Is Null Then

-- Write to Session, Notification must enter a username and password

Apex_Util.Set_Session_State('LOGIN_MESSAGE','Please enter Username and password.');

Return False;

End If;

----

Begin

Select u.Active

,u.Password

,u.Email

Into v_Active

,v_Password

,v_Email

From User_Account u

Where u.User_Name = p_User_Name;

Exception

When No_Data_Found Then

-- Write to Session, User not found.

Apex_Util.Set_Session_State('LOGIN_MESSAGE','User not found');

Return False;

End;

If v_Password <> p_Password Then

-- Write to Session, Password incorrect.

Apex_Util.Set_Session_State('LOGIN_MESSAGE','Password incorrect');

Return False;

End If;

If v_Active <> 'Y' Then

Apex_Util.Set_Session_State('LOGIN_MESSAGE','User locked, please contact admin');

Return False;

End If;

---

-- Write user information to Session.

--

Apex_Util.Set_Session_State('SESSION_USER_NAME',p_User_Name);

Apex_Util.Set_Session_State('SESSION_EMAIL',v_Email);

---

---

Return True;

End;

--------------------------------------

Procedure Process_Login(p_User_Name Varchar2

,p_Password Varchar2

,p_App_Id Number) As

v_Result Boolean := False;

Begin

v_Result := Authenticate_User(p_User_Name,p_Password);

If v_Result = True Then

-- Redirect to Page 1 (Home Page).

Wwv_Flow_Custom_Auth_Std.Post_Login(p_User_Name -- p_User_Name

,p_Password -- p_Password

,v('APP_SESSION') -- p_Session_Id

,p_App_Id || ':1' -- p_Flow_page

);

Else

-- Login Failure, redirect to page 101 (Login Page).

Owa_Util.Redirect_Url('f?p=&APP_ID.:101:&SESSION.');

End If;

End;

End Pkg_Security;

/

应用程序项定义：

使用应用程序项可以维护会话状态。应用程序项可以通过使用计算, 处理或在 URL 中传递值来设置。使用 "新建实例时" 计算可以为会话设置一次项值。使用应用程序项可以维护未显示并且未指定给任何页的会话状态。