前言:
这种场景还是比较多的，比如Quartz定时器框架，比如我们自己编写的一些工具类还想对数据库操作等。
解决方案，通过手动实现ApplicationContextAware，从applicationContext中获取bean即可。
@Component
public class SpringUtils implements ApplicationContextAware {
private static ApplicationContext applicationContext = null;
@Override
public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
if(SpringUtils.applicationContext == null){
SpringUtils.applicationContext = applicationContext;
}
}
//获取applicationContext
public static ApplicationContext getApplicationContext() {
return applicationContext;
}
//通过name获取 Bean.
public static Object getBean(String name){
return getApplicationContext().getBean(name);
}
//通过class获取Bean.
public static <T> T getBean(Class<T> clazz){
return getApplicationContext().getBean(clazz);
}
//通过name,以及Clazz返回指定的Bean
public static <T> T getBean(String name,Class<T> clazz){
return getApplicationContext().getBean(name, clazz);
}
}