1.權限是幾乎每個系統都需要的
2.一般在用戶請求某個url的時候，都需要驗證用戶是否擁有該url的訪問權限
3.最簡單的權限系統需要 用戶表，角色表，用戶角色表，權限表，角色權限表
# Host: 127.0.0.1 (Version: 5.6.22)
# Date: 2015-04-09 10:52:58
# Generator: MySQL-Front 5.3 (Build 4.13)
/*!40101 SET NAMES utf8 */;
#
# Source for table "privilege"
#
CREATE TABLE `privilege` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`name` varchar(255) DEFAULT NULL,
`url` varchar(255) DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
#
# Data for table "privilege"
#
INSERT INTO `privilege` VALUES (1,'產品增加','/product/add'),(2,'產品刪除','/product/delete'),(3,'產品修改','/product/update'),(4,'產品查詢','/product/query');
#
# Source for table "role"
#
CREATE TABLE `role` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`name` varchar(255) DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8;
#
# Data for table "role"
#
INSERT INTO `role` VALUES (1,'admin'),(2,'manager'),(3,'guest');
#
# Source for table "role_priv"
#
CREATE TABLE `role_priv` (
`role_id` int(11) NOT NULL,
`priv_id` int(11) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
#
# Data for table "role_priv"
#
INSERT INTO `role_priv` VALUES (1,1),(2,1),(1,3);
#
# Source for table "user"
#
CREATE TABLE `user` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`name` varchar(255) DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=6 DEFAULT CHARSET=utf8;
#
# Data for table "user"
#
INSERT INTO `user` VALUES (1,'jack'),(2,'jaychang'),(3,'jasaon'),(4,'lucy'),(5,'marry');
#
# Source for table "user_role"
#
CREATE TABLE `user_role` (
`user_id` int(11) NOT NULL DEFAULT '0',
`role_id` int(11) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
#
# Data for table "user_role"
#
INSERT INTO `user_role` VALUES (1,1),(1,3),(3,2),(2,2);
4.表對應的實體類
放在了sample包下
public class Privilege {
private Integer id;
private String name;
private String url;
...省略get,set方法
}
public class User {
private Integer id;
private String name;
private List roles;
...省略get,set方法
}
public class Role {
private Integer id;
private String name;
private List privileges;
...省略get,set方法
}
5.mybatis配置文件
/p>
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
6.UserMapper.xml
/p>
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
select u.id as user_id,u.name as user_name,r.id as role_id,
r.name as role_name,p.id as priv_id,p.name as priv_name,p.url as priv_url
from user u
left join user_role ur on u.id = ur.user_id
left join role r on r.id = ur.role_id
left join role_priv rp on r.id = rp.role_id
left join privilege p on p.id = rp.priv_id
where u.id = #{id}
測試
List users = sqlSession.selectList("selectUserById", 1L);
for (User u : users) {
System.out.println("用戶名：" + u.getName());
List roles = u.getRoles();
if (null != roles) {
for (Role role : roles) {
System.out.println(" 擁有角色：" + role.getName());
List privs = role.getPrivileges();
if (null != privs && privs.size() > 0) {
System.out.println(" 該角色【" + role.getName()
+ "】，擁有的權限:");
for (Privilege priv : privs) {
System.out.println(" " + priv.getName()
+ "," + priv.getUrl());
}
}
}
}
}
