Question

@Value注释在某些方面可用于执行时不会将Spel结果注入属性。当我从DbAspect注释掉建议或者尝试使用getter访问属性时，它工作正常。

代码是：

Application.java：

FragmentManager fm = getFragmentManager();
                mapFragment = (MapFragment) fm.findFragmentById(R.id.map_container);
                if (mapFragment == null) {
                    mapFragment = MapFragment.newInstance();
                    Log.d("CHECK_SPEED", "replace");
                    fm.beginTransaction().replace(R.id.map_container, mapFragment)
                            .setCustomAnimations(R.anim.fade_in, R.anim.fade_out, R.anim.fade_in, R.anim.fade_out)
                            .commit();
                    setupGoogleMap();
                }

config.xml中：

package com.spring.demo;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class Application {
    public static void main(String[] args) {
        ApplicationContext ctx = new ClassPathXmlApplicationContext("config.xml");
        Dummy dummy = ctx.getBean(Dummy.class);

        System.out.println(dummy.integer);
        System.out.println(dummy.name);
        System.out.println(dummy.map);
        System.out.println(dummy.list);
    }
}

DbAspect.java：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd
       http://www.springframework.org/schema/aop
       http://www.springframework.org/schema/aop/spring-aop.xsd
       http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context.xsd">

    <context:annotation-config/>
    <context:component-scan base-package="com.spring.demo"/>
    <aop:aspectj-autoproxy/>
</beans>

Dummy.java

package com.spring.demo;

import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.springframework.stereotype.Component;

@Component
@Aspect
public class DbAspect {

    @Before("execution(void *.*(..))")
    void beforeAdvice() {
        System.out.println("=======================args advice");
    }
}

使用具有AOP duo的getter访问属性的弹簧约定是什么？

应用建议时，Spring @Value注释不起作用

0 个答案: