SpringSecurity集成JWT实现后端认证授权保姆级教程-授权配置篇

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视频教程：
上一篇：SpringSecurity集成JWT实现后端认证授权保姆级教程-认证配置篇
🤞上一节编写了对应的SpringSecurity的认证，本节开始进行SpringSecurity授权🤞

🎈修改用户类返回用户权限信息

修改对应的getAuthorities方法

@TableName(value ="cust_user")
@Data
public class CustUser implements Serializable, UserDetails {  //这里新增实现UserDetails 
    @TableId(type = IdType.AUTO)
    private Integer id;
    private String username;
    private String nickname;
    private Integer enable;
    private String password;
//----------------------------------------------------以下为新增的部分---------------------------------
     @TableField(exist = false)
    private List<String> permissions;  //权限集合

    //存储SpringSecurity所需要的权限信息的集合
    //安全限制，不允许序列化
    @JSONField(serialize = false)
    @JsonIgnore
    @TableField(exist = false)
    private List<GrantedAuthority> authorities;

    @Override
    public Collection<? extends GrantedAuthority> getAuthorities() {
//        return Arrays.asList(new SimpleGrantedAuthority("ROLE_USER"));
        if (this.authorities == null) {
            //把permissions中字符串类型的权限信息转换成GrantedAuthority对象存入authorities中
            this.authorities = this.permissions.stream().distinct().map(SimpleGrantedAuthority::new).collect(Collectors.toList());
        }
        return this.authorities;
    }
    //------------------------------------------------------------------------------------------------
    @Override
    public boolean isAccountNonExpired() {
        return true;
    }
    @Override
    public boolean isAccountNonLocked() {
        return true;
    }
    @Override
    public boolean isCredentialsNonExpired() {
        return true;
    }
    @Override
    public boolean isEnabled() {
        return true;
    }

    @TableField(exist = false)
    private static final long serialVersionUID = 1L;
}

🎈对CustUserServiceImpl 进行修改

对CustUserServiceImpl 中的loadUserByUsername进行修改

针对之前的数据准备篇的CustUserServiceImpl实现类进行更改

@Service
public class CustUserServiceImpl extends ServiceImpl<CustUserMapper, CustUser> implements CustUserService{ //这个地方新增实现CustUserService接口

    @Autowired
    private CustUserMapper custUserMapper;

    @Autowired
    private SysMenuMapper menuMapper;
    //-----------------------------------------------------以下为修改的内容------------------------------------------
    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        LambdaQueryWrapper<CustUser> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(CustUser::getUsername, username);
        CustUser user = custUserMapper.selectOne(queryWrapper);
        if (user == null) {
            log.error("用户名不存在");
            throw new UsernameNotFoundException("用户名不存在");
        }else {
            List<String> permissions = menuMapper.selectPermsByUserId(user.getId());
            user.setPermissions(permissions); //封装权限
            return user;
        }
    }
//----------------------------------------------------------------------------
}

上边的这个主要是实现loadUserByUsername方法中获取数据库中用户的权限。
添加之后会发现上边的menuMapper.selectPermsByUserId(user.getId());报错，因为我们还没有在menuMapper新增selectPermsByUserId方法，接下来我们新增一个查询用户权限的方法。

🎈新增根据用户id查询权限的方法

在mapper/SysMenuMapper中的新增方法selectPermsByUserId

public interface SysMenuMapper extends BaseMapper<SysMenu> {
    List<String> selectPermsByUserId(Integer id);
}

在resources/SysMenuMapper/xml中的新增方法selectPermsByUserId

    <select id="selectPermsByUserId" resultType="java.lang.String">
        SELECT
            DISTINCT m.`perms`
        FROM
            sys_user_role ur
                LEFT JOIN `sys_role` r ON ur.`role_id` = r.`id`
                LEFT JOIN `sys_role_menu` rm ON ur.`role_id` = rm.`role_id`
                LEFT JOIN `sys_menu` m ON m.`id` = rm.`menu_id`
        WHERE
            user_id = #{id}
          AND r.`status` = 0
          AND m.`status` = 0
    </select>

🎈编写权限测试的接口

在数据库中的增加test权限
在这里插入图片描述

@Api(tags = "测试类")
@RestController
@RequestMapping("/test")
public class TestController {

    @Autowired
    private CustUserService custUserService;

    @ApiOperation(value = "测试方法")
    @PreAuthorize("hasAuthority('test')")  // 权限验证 需要用户具有test权限
    @GetMapping("/test")
    public CustUser test(){
        return custUserService.getById(1);
    }

}