@Component
public class RequestInterceptor implements HandlerInterceptor {
private static Logger log = LoggerFactory.getLogger(RequestInterceptor.class);
@Autowired
JwtUtils jwtUtils;
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
log.info("[RequestInterceptor] Request received is:" + request.toString());
String authHeader = request.getHeader("Authorization");
String token = authHeader.split(Constants.authorizationPrefix)[1];
log.info("token:" + token);
// JwtUtils jwtUtils = new JwtUtils();
DecodedJWT decodedJWT = jwtUtils.decode(token);
return true;
}
@Override
public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
}
@Override
public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
}
}
然后这是JwtUtils：
@Service
@Component
public class JwtUtils {
private static Logger log = LoggerFactory.getLogger(JwtUtils.class);
private final Request request;
private final Environment environment;
@Autowired
public JwtUtils(Request request, Environment environment) {
this.request = request;
this.environment = environment;
}
public DecodedJwt decode(String token) { //decode here }
}
我在@Autowired课程的顶部添加了Request。 Environment课程来自org.springframework.core.env.Environment
调试时，jwtUtils中的RequestInterceptor为null。
这可能是什么原因??
我尝试注入字段而不使用构造函数，但它仍然无效。
当我从@Service移除@Component和JwtUtils时，我可以使用new运算符在JwtUtils中使用RequestInterceptor，但是case utowired in字段{JwtUtils -请求and环境- become null`。
案例2：
当我在JwtUtils和@Service的其他课程中使用@Component时，就没有任何问题。
这就是RequestInterceptor的注册方式
@Configuration
public class WebConfig extends WebMvcConfigurerAdapter {
@Override
public void addInterceptors(InterceptorRegistry registry) {
registry.addInterceptor(new RequestInterceptor());
}
}