Shiro--Realm访问数据库

雨点打透心脏的1/2处 2021-08-24 17:10 430阅读 0赞

Realm中认证和授权数据从数据库获取：

### 表结构 ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NvbGRfX19wbGF5_size_16_color_FFFFFF_t_70]  
用户表：sys\_user:  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NvbGRfX19wbGF5_size_16_color_FFFFFF_t_70 1]  
角色表：sys\_role:  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NvbGRfX19wbGF5_size_16_color_FFFFFF_t_70 2]  
中间表：sys\_user\_role:  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NvbGRfX19wbGF5_size_16_color_FFFFFF_t_70 3]  
资源表：sys\_resource  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NvbGRfX19wbGF5_size_16_color_FFFFFF_t_70 4]  
中间表：sys\_role\_resource:  
![在这里插入图片描述][20200209213753491.png]

### UserMapper.java ###

public interface UserMapper {  
        ......
            
        /** * 根据用户id获取用户的角色名称集合 * @param userId * @return */
        Set<String> selectUserRoleSet(Integer userId);
    
        /** * 根据用户id获取用户的权限名称集合 * @param userId * @return */
        Set<String> selectUserPermissionSet(Integer userId);
    }

### UserMapper.xml ###

<select id="selectUserRoleNameSet" resultType="java.lang.String" parameterType="java.lang.Integer">
        SELECT DISTINCT
    		t1.name
        FROM
            sys_role t1,
                sys_user_role t2
        WHERE
            t1.role_id = t2.role_id
        AND t2.user_id = #{userId}
      </select>
    
      <select id="selectUserPermissionNameSet" resultType="java.lang.String" parameterType="java.lang.Integer">
        SELECT DISTINCT
           t1.permission
        FROM
           sys_resource t1,
           sys_role_resource t2,
           sys_user_role t3
        WHERE t1.permission IS NOT NULL
        AND t1.resource_id = t2.resource_id
        AND t2.role_id = t3.role_id
        AND t3.user_id = #{userId}
      </select>

### ShiroRealm ###

public class ShiroRealm extends AuthorizingRealm { 
    
        @Autowired
        private UserMapper userMapper;
    
        /** * 认证 * * @param authenticationToken * @return * @throws AuthenticationException */
        @Override
        protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken authenticationToken)
                throws AuthenticationException { 
            System.out.println("认证...");
            UsernamePasswordToken token = (UsernamePasswordToken) authenticationToken;
    
            //1.获取主体信息
            String username = token.getUsername();
            //2.获取凭证信息
            String password = new String(token.getPassword());
    
            //3.获取用户信息
            UserExample param = new UserExample();
            param.createCriteria().andUsernameEqualTo(username);
            User user = null;
            try { 
                user = userMapper.selectByExample(param).get(0);
            } catch (Exception e) { 
    
            }
    
            if (user == null) { 
                throw new UnknownAccountException("用户名或密码错误");
            }
    
            String db_password = user.getPassword();// 数据库存储的密码
            if (!db_password.equals(password)) { 
                throw new IncorrectCredentialsException("密码错误");
            }
            SimpleAuthenticationInfo info =
                    new SimpleAuthenticationInfo(user, token.getCredentials(), getName());
            return info;
        }
    
        /** * 授权检查 * * @param principals * @return */
        @Override
        protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principals) { 
            System.out.println("授权...");
    
            User user = (User) principals.getPrimaryPrincipal(); //
            // 通过用户名去数据库查询该用户有哪些角色和权限
            // 创建简单授权信息对象
            SimpleAuthorizationInfo info = new SimpleAuthorizationInfo();
    
            // 设置角色信息
            Set<String> roles =
                    userMapper.selectUserRoleNameSet(user.getUserId());
            info.addRoles(roles);
    
            // 设置权限信息
            Set<String> permissionSet =
                    userMapper.selectUserPermissionNameSet(user.getUserId());
            Set<String> permissions = new HashSet<>();
            for (String item : permissionSet) { 
                for (String p : item.split(",")) { 
                    permissions.add(p);
                }
            }
            info.addStringPermissions(permissions);
            return info;
        }
    }

### 测试 ###

@RunWith(SpringJUnit4ClassRunner.class)
    @ContextConfiguration(locations = "classpath:spring-config.xml")
    public class ShiroTest { 
        @Autowired
        private SecurityManager securityManager;
        @Test
        public void test(){ 
            String username = "admin";
            //对密码进行加密
            String password = MD5Util.md5("123456","ak47");
            UsernamePasswordToken token = new UsernamePasswordToken(username, password);
            SecurityUtils.getSubject().login(token);
            Subject subject = SecurityUtils.getSubject();
            System.out.println(subject.hasRole("系统管理员"));
            System.out.println(subject.isPermitted("sys:user:list"));
            // 退出登录
            subject.logout();
        }
    }

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[20200209213753491.png]: /images/20210813/a3f9cc8d70c64366925261b8057ea1e0.png