如何确保Java中的批注执行顺序? [英] How to ensure annotations execution order in java?

问题描述

我有2个自定义注释，但是一个注释应该始终在另一个注释之前执行.我如何确保这一点?是否存在某种排序或使用其他方法定义呢?

i have 2 custom annotations, but one should always executed before the other. How do i ensure this? Is there some kind of ordering or do it with additional method definitions?

推荐答案

您可以使用@Order注释来确保自定义注释的顺序.

You can ensure the order of your custom annotations with @Order annotation.

https://docs.spring.io/spring/docs/current/javadoc-api/org/springframework/core/annotation/Order.html

示例:

第一个注释:

@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.METHOD)
public @interface CustomAnnotation {
}

@Aspect
@Component
@Order(value = 1)
public class CustomAnnotationInterceptor {

    @Before("@annotation(customAnnotation )")
    public void intercept(JoinPoint method, CustomAnnotation customAnnotation ) {
        //Code here
    }
}

第二个注释:

@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.METHOD)
public @interface CustomAnnotationTwo {
}

@Aspect
@Component
@Order(value = 2)
public class CustomAnnotationInterceptorTwo {

    @Before("@annotation(customAnnotationTwo )")
    public void intercept(JoinPoint method, CustomAnnotationTwo customAnnotationTwo ) {
        //Code here
    }

使用它们:

@CustomAnnotationTwo
@CustomAnnotation
public void someMethod(){
}

在此示例中，CustomAnnotationInterceptor将首先执行.

In this example, CustomAnnotationInterceptor will execute first.

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