spring通过编程的方式获取bean

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

@Component("applicationContextHelper")
/**
* 获取context上下文中的bean
*/
public class ApplicationContextHelper implements ApplicationContextAware {

private static ApplicationContext applicationContext;

public void setApplicationContext(ApplicationContext context) throws BeansException {
applicationContext = context;
}

public static <T> T popBean(Class<T> clazz) {
if (applicationContext == null) {
return null;
}
return applicationContext.getBean(clazz);
}

public static <T> T popBean(String name, Class<T> clazz) {
if (applicationContext == null) {
return null;
}
return applicationContext.getBean(name, clazz);
}
}