经典权限系统设计(五张表)

大致用到５张表：用户表(UserInfo)、角色表(RoleInfo)、菜单表(MenuInfo)、用户角色表(UserRole)、角色菜单表(RoleMenu)。

　　各表的大体表结构如下：

　　１、用户表(UserInfo)：Id、UserName、UserPwd

　　２、角色表(RoleInfo)：Id、RoleName

　　３、菜单表(MenuInfo)：Id、MenuName

　　４、用户角色表(UserRole)：Id、UserId、RoleId

　　５、角色菜单表(RoleMenu)：Id、RoleId、MenuId

最关键的地方是，某个用户登录时，如何查找该用户的菜单权限？其实一条语句即可搞定：

假如用户的用户名为zhangsan，则他的菜单权限查询如下：

Select m.Id,m.MenuName from MenuInfo m ,UserInfo u UserRole ur, RoleMenu rm Where m.Id = rm.MenuId and ur.RoleId = rm.RoleId and ur.UserId = u.Id and u.UserName = 'zhangsan'

权限管理系统经典的五张表

DESC t_userDESC t_roleDESC t_menuDESC t_userrole​DROP TABLE IF EXISTS t_user;DROP TABLE IF EXISTS t_role;DROP TABLE IF EXISTS t_menu;DROP TABLE IF EXISTS t_userrole;​CREATE TABLE t_user(usr_id INT AUTO_INCREMENT PRIMARY KEY COMMENT 'ID',usr_account VARCHAR(32) NOT NULL UNIQUE COMMENT '账号',usr_password CHAR(32) NOT NULL COMMENT '密码')COMMENT '用户表';​CREATE TABLE t_role(ro_id INT AUTO_INCREMENT PRIMARY KEY COMMENT 'ID',ro_name VARCHAR(32) NOT NULL UNIQUE COMMENT '角色名')COMMENT '角色表';​CREATE TABLE t_menu(mu_id INT AUTO_INCREMENT PRIMARY KEY COMMENT 'ID',mu_name VARCHAR(32) NOT NULL UNIQUE COMMENT '菜名')COMMENT '菜单表';​CREATE TABLE t_userrole(ur_usr_id INT COMMENT '用户ID',ur_ro_id INT COMMENT '角色ID')COMMENT '用户角色表';​CREATE TABLE t_rolemenu(rm_ro_id INT COMMENT '角色ID',rm_mu_id INT COMMENT '菜单ID',PRIMARY KEY(rm_ro_id,rm_mu_id),FOREIGN KEY(rm_ro_id) REFERENCES t_role(ro_id),FOREIGN KEY(rm_mu_id) REFERENCES t_menu(mu_id))COMMENT '角色菜单表';​INSERT INTO t_user(usr_account,usr_password) VALUES('chenxueli','111'); -- SYSINSERT INTO t_user(usr_account,usr_password) VALUES('chensheng','222'); -- SYSTEMINSERT INTO t_user(usr_account,usr_password) VALUES('zsf','333'); -- ADMININSERT INTO t_user(usr_account,usr_password) VALUES('zs','444'); -- USER​INSERT INTO t_role(ro_name) VALUES('SYS');INSERT INTO t_role(ro_name) VALUES('SYSTEM');INSERT INTO t_role(ro_name) VALUES('ADMIN');INSERT INTO t_role(ro_name) VALUES('USER');​INSERT INTO t_menu(mu_name) VALUES('拉黑用户');-- SYSINSERT INTO t_menu(mu_name) VALUES('运费险');-- SYS SYSTEMINSERT INTO t_menu(mu_name) VALUES('上架');-- SYS SYSTEM ADMININSERT INTO t_menu(mu_name) VALUES('下架');-- SYS SYSTEM ADMININSERT INTO t_menu(mu_name) VALUES('下单');-- USERINSERT INTO t_menu(mu_name) VALUES('付款');-- USER​INSERT INTO t_userrole VALUES(1,1),(1,2);INSERT INTO t_userrole VALUES(2,2);INSERT INTO t_userrole VALUES(3,3);INSERT INTO t_userrole VALUES(4,4);​INSERT INTO t_rolemenu VALUES(1,1),(1,2);INSERT INTO t_rolemenu VALUES(2,2),(2,3)(2,4);INSERT INTO t_rolemenu VALUES(3,3),(3,4);INSERT INTO t_rolemenu VALUES(4,5),(4,6);​SELECT * FROM t_rolemenu ORDER BY ro_id;