自学shiro

1.实现AuthorizingRealm接口，重写两个方法

public class AuthRealm extends AuthorizingRealm {
    @Autowired
    private UserService userService;

    //授权
    @Override
    protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principals) {
        User user = (User) principals.fromRealm(this.getClass().getName()).iterator().next();
        List<String> permissionList = new ArrayList<String>();
        List<String> roleNameList = new ArrayList<String>();
        Set<Role> roleSet = user.getRoles();
        if (CollectionUtils.isNotEmpty(roleSet)) {
            for (Role role : roleSet) {
                roleNameList.add(role.getRname());
                Set<Permission> permissionSet = role.getPermissions();
                if (CollectionUtils.isNotEmpty(permissionSet)) {
                    for (Permission permission : permissionSet) {
                        permissionList.add(permission.getName());
                    }
                }
            }
        }
        SimpleAuthorizationInfo info = new SimpleAuthorizationInfo();
        info.addStringPermissions(permissionList);
        info.addRoles(roleNameList);
        return info;
    }

    // 认证登陆
    @Override
    protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken authenticationToken) throws AuthenticationException {
        UsernamePasswordToken usernamePasswordToken = (UsernamePasswordToken) authenticationToken;
        String username = usernamePasswordToken.getUsername();
        User user = userService.findByUsername(username);
        return new SimpleAuthenticationInfo(user, user.getPassword(), this.getClass().getName());
    }
}