在Spring Boot应用程序的主要方法中不能使用@Autowired JPA存储库

Question

@SpringBootApplication
public class FullstackApplication {
    
    @Autowired
    private CarRepository carRepository;
    
    private static final Logger logger = LoggerFactory.getLogger(FullstackApplication.class); 

    public static void main(String[] args) {
        carRepository. // Here I get a compilation error: Cannot make a static reference to a non-static field
        SpringApplication.run(FullstackApplication.class, args);

    }
    
    @Bean
    CommandLineRunner runner(){
        return args -> {
            // Save demo data to database
            carRepository.save(new Car("Ford", "Mustang", "Red",
            "ADF-1121", 2017, 59000));
            carRepository.save(new Car("Nissan", "Leaf", "White",
            "SSJ-3002", 2014, 29000));
            carRepository.save(new Car("Toyota", "Prius", "Silver",
            "KKO-0212", 2018, 39000));
        };
    }
}

Answer 1

您直接从静态方法访问非静态字段，这在java中是不允许的

此外，您不能创建静态字段@autowired

所以如果你这么做

@Autowired
  private static CarRepository carRepository;