java-bean容器工具类

bean容器工具类

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

/**
 * 获取Spring容器中bean工具类
 *
 */
@Component("springContextUtils")
public class SpringContextUtils implements ApplicationContextAware {
    private static ApplicationContext applicationContext = null;

    public static ApplicationContext getApplicationContext() {
        return applicationContext;
    }

    @SuppressWarnings("unchecked")
    public static  T getBean(String beanId) {
        return (T) applicationContext.getBean(beanId);
    }

    public static  T getBean(Class requiredType) {
        return (T) applicationContext.getBean(requiredType);
    }

    /**
     * Spring容器启动后，会把 applicationContext 给自动注入进来，然后我们把 applicationContext 赋值到静态变量中，方便后续拿到容器对象
     * @see ApplicationContextAware#setApplicationContext(ApplicationContext)
     */
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        SpringContextUtils.applicationContext = applicationContext;
    }

}