找不到Spring Boot的Bean

Question

我在尝试用标记化启动Spring Boot应用程序时遇到问题。这是我的服务课：

@Service
@Slf4j
public class JwtTokenService {
    private final JwtConfig jwtConfig;

    public JwtTokenService(JwtConfig jwtConfig) {
        this.jwtConfig = jwtConfig;
    }

    public String generateToken(Authentication authentication) {
        Long now = System.currentTimeMillis();
        return Jwts.builder()
                .setSubject(authentication.getName())
                .claim("authorities", authentication.getAuthorities().stream()
                        .map(GrantedAuthority::getAuthority).collect(Collectors.toList()))
                .setIssuedAt(new Date(now))
                .setExpiration(new Date(now + jwtConfig.getExpiration() * 1000))
                .signWith(SignatureAlgorithm.HS512, jwtConfig.getSecret().getBytes())
                .compact();
    }

}

这是我的配置类：

@Data
@NoArgsConstructor
@Component
public class JwtConfig {
    @Value("${security.jwt.uri:/auth/**}")
    private String Uri;

    @Value("${security.jwt.header:Authorization}")
    private String header;

    @Value("${security.jwt.prefix:Bearer }")
    private String prefix;

    @Value("${security.jwt.expiration:#{24*60*60}}")
    private int expiration;

    @Value("${security.jwt.secret:JwtSecretKey}")
    private String secret;
}

当我尝试运行我的应用程序时，我会出现以下错误：

***************************
APPLICATION FAILED TO START
***************************

Description:

Parameter 0 of constructor in services.JwtTokenService required a bean of type 'config.JwtConfig' that could not be found.


Action:

Consider defining a bean of type 'config.JwtConfig' in your configuration.

我不明白为什么我会犯这个错误。

Answer 1

我解决了。问题是配置所在的包没有被我的Spring启动应用程序扫描。在我的@SpringBootApplication中，我在JwtConfig所在的包中添加了@ComponentScan。