Spring 获取实现某接口的所有实例bean

港控/mmm° 2021-06-24 14:36 712阅读 0赞

首先，获取 applicationContext，通过ApplicationAware自动注入

import org.apache.commons.logging.Log;
    import org.apache.commons.logging.LogFactory;
    import org.springframework.beans.BeansException;
    import org.springframework.context.ApplicationContext;
    import org.springframework.context.ApplicationContextAware;
    import org.springframework.core.io.Resource;
    import org.springframework.stereotype.Component;
    
    import java.io.IOException;
    import java.util.HashMap;
    import java.util.Map;
    import java.util.Properties;
    
    /**
     * @ClassName: SpringBeanUtil
     * @Description: TODO(spring功能类，用于获取bean)
     * @author zhoushun
     * @date 2012-11-27 下午04:22:36
     * 
     */
    @Component("springBeanUtil")
    public class SpringBeanUtil implements ApplicationContextAware {
    	protected final static Log logger = LogFactory.getLog(SpringBeanUtil.class);
    
    	private static ApplicationContext ctx = null;
    
    	private static Map<String, Properties> propMap = new HashMap<String, Properties>(
    			0);
    
    	public void setApplicationContext(ApplicationContext ctx)
    			throws BeansException {
    		SpringBeanUtil.ctx = ctx;
    	}
    
        public static ApplicationContext getApplicationContext() {
            return ctx;
        }
    
        public  static <T> T getBean(String prop) {
            Object obj = ctx.getBean(prop);
            if (logger.isDebugEnabled()) {
                logger.debug("property=[" + prop + "],object=[" + obj + "]");
            }
            return (T)obj;
        }
    
    	public static Properties getProperties(String filepath) {
    		if (propMap.containsKey(filepath))
    			return propMap.get(filepath);
    
    		Resource resource = ctx.getResource(filepath);
    		Properties prop = new Properties();
    		try {
    			prop.load(resource.getInputStream());
    			propMap.put(filepath, prop);
    			return prop;
    		} catch (IOException e) {
    			logger
    					.error("can not find the resource file:[" + filepath + "]",
    							e);
    			return null;
    		}
    	}
    }

使用：

Map<String, Interface> result = SpringBeanUtil.getApplicationContext().getBeansOfType(Interface.class);

key位 bean name，value为实例

String\[\] result = SpringBeanUtil.getApplicationContext().getBeanNamesForType(IPrizeInvoke.class);

返回 bean name 的String 数组