spring中Aware 接口感知捕获

Aware 接口感知捕获

内容感知方式一：

package cn.mesmile.desk.config;
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.context.EnvironmentAware;
import org.springframework.context.ResourceLoaderAware;
import org.springframework.context.annotation.PropertySource;
import org.springframework.core.env.Environment;
import org.springframework.core.io.Resource;
import org.springframework.core.io.ResourceLoader;
import org.springframework.stereotype.Service;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
/** * @author zb * @version 1.0 * @date 2020/7/18 17:50 * @description 内容感知 * * BeanNameAware 获取bean的名称 * BeanFactoryAware 获取BeanFactory * ResourceLoaderAware 获取资源加载器 * EnvironmentAware 获取环境信息 */
@Service
@PropertySource(value = "classpath:test.properties")
public class AwareService implements BeanNameAware, BeanFactoryAware,
        ResourceLoaderAware, EnvironmentAware { 
    private String beanName;
    private ResourceLoader resourceLoader;
    private Environment environment;
    /** * 获取数据 * @throws IOException */
    public void getValue() throws IOException { 
        System.out.println("beanName: "+ beanName);
        Resource resource = resourceLoader.getResource("classpath:test.txt");
        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(resource.getInputStream()));
        String s = bufferedReader.readLine();
        System.out.println("s: "+ s);
        bufferedReader.close();
        String property = environment.getProperty("my.address");
        System.out.println("property: "+ property);
    }
    /** * * @param beanFactory * @throws BeansException */
    @Override
    public void setBeanFactory(BeanFactory beanFactory) throws BeansException { 
    }
    @Override
    public void setBeanName(String s) { 
        this.beanName = s;
    }
    @Override
    public void setEnvironment(Environment environment) { 
        this.environment = environment;
    }
    @Override
    public void setResourceLoader(ResourceLoader resourceLoader) { 
        this.resourceLoader = resourceLoader;
    }
}

内容感知方式二：

package cn.mesmile.desk.config;
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.context.annotation.PropertySource;
import org.springframework.core.env.Environment;
import org.springframework.core.io.Resource;
import org.springframework.stereotype.Component;
/** * @author zb * @version 1.0 * @date 2020/7/18 18:14 * @description */
@PropertySource(value = "classpath:test.properties")
@Component
public class contextAware implements ApplicationContextAware { 
    private ApplicationContext applicationContext;
    public void getValue(){ 
        // 判断 bean 是否存在
        boolean beanName = applicationContext.containsBean("beanName");
        Object beanName1 = applicationContext.getBean("beanName");
        AwareService bean = applicationContext.getBean(AwareService.class);
        AwareService awareService = applicationContext.getBean("awareService", AwareService.class);
        Environment environment = applicationContext.getEnvironment();
        String property = environment.getProperty("my.address");
        Resource resource = applicationContext.getResource("test.txt");
        String[] beanDefinitionNames = applicationContext.getBeanDefinitionNames();
    }
    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException { 
        this.applicationContext = applicationContext;
    }
}