BeanNameAware和BeanFactoryAware接口

平時寫代碼很少去實現這兩個接口，這里只是做下了解，方便讀Spring源碼。

BeanNameAware接口作用：讓Bean對Name或id有知覺

package com.example.demo.biz.service;

import org.springframework.beans.factory.BeanNameAware;
import org.springframework.stereotype.Service;

/**
 * BeanNameAware作用：讓Bean對Name有知覺
 */
@Service
public class BizService implements BeanNameAware {
    private String beanName;

    @Override
    public void setBeanName(String s) {
        this.beanName = s;
    }

    public String getBeanName() {
        return beanName;
    }
}

測試

package com.example.demo.biz.service;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;

import javax.annotation.Resource;

@RunWith(SpringRunner.class)
@SpringBootTest
public class BeanNameAwareTest {

    @Resource
    private BizService bizService;

    @Test
    public void test1(){
        System.out.println(bizService.getBeanName());
    }
}

結果：

 BeanFactoryAware接口：讓Bean獲取配置他們的BeanFactory的引用。

修改下上面的例子

package com.example.demo.biz.service;

import org.springframework.beans.BeansException;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.BeanFactoryAware;
import org.springframework.beans.factory.BeanNameAware;
import org.springframework.stereotype.Service;

/**
 * BeanNameAware作用：讓Bean對Name有知覺
 */
@Service
public class BizService implements BeanNameAware, BeanFactoryAware {
    private String beanName;

    private BeanFactory factory;

    @Override
    public void setBeanName(String s) {
        this.beanName = s;
    }

    public String getBeanName() {
        return beanName;
    }

    @Override
    public void setBeanFactory(BeanFactory beanFactory) throws BeansException {
        this.factory = beanFactory;
    }

    public BeanFactory getFactory() {
        return factory;
    }

    @Override
    public String toString() {
        return "----------------------->";
    }
}

    @Test
    public void test2(){
        System.out.println(bizService.getFactory().getBean(bizService.getBeanName()));
    }