Articles tagged with: @order

rder的规则：

order的值越小，优先级越高

order如果不标注数字，默认最低优先级，因为其默认值是int最大值

该注解等同于实现Ordered接口getOrder方法，并返回数字。

@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.TYPE, ElementType.METHOD, ElementType.FIELD})
@Documented
public @interface Order {
    int value() default 2147483647;
}

例子：

OrderRunner1.java

@Component
@Order(1)
public class OrderRunner1 implements CommandLineRunner {

    @Override
    public void run(String... args) throws Exception {
        System.out.println("The OrderRunner1 start to initialize ...");
    }
}

OrderRunner2.java

@Component
@Order(2)
public class OrderRunner2 implements CommandLineRunner {

    @Override
    public void run(String... args) throws Exception {
        System.out.println("The OrderRunner2 start to initialize ...");
    }
}

启动日志：

…
…
The OrderRunner1 start to initialize …
The OrderRunner2 start to initialize …