Spring中@Order注释有什么用？

Question

@Order(1)
public class StatelessAuthenticationSecurityConfig extends WebSecurityConfigurerAdapter {

    @Autowired
    private UserDetailsService userDetailsService;

    @Autowired
    private TokenAuthenticationService tokenAuthenticationService;

}

Answer 1

它用于通知执行优先级。

优先级最高的通知首先运行。数字越低，优先级越高。例如，给定两个“before”建议，优先级最高的将首先运行。

另一种使用方法是订购Autowired收藏

@Component
@Order(2)
class Toyota extends Car {
    public String getName() {
        return "Toyota";
    }
}

@Component
@Order(1)
class Mazda extends Car {
    public String getName() {
        return "Mazda";
    }
}

@Component
public class Cars {
    @Autowired
    List<Car> cars;

    public void printNames(String [] args) {

        for(Car car : cars) {
            System.out.println(car.getName())
        }
    }
}