SpringContextUtil工具类记录

1.SpringContextUtil工具类记录，可在无法注入Bean的时候选择使用，比如在枚举类中实际上是无法使用被IOC管理的Bean的，除非是通过方法传入，现在提供一个工具类解决这个问题（做记录）。

@Component
public class SpringContextUtil implements ApplicationContextAware {

    private static ApplicationContext applicationContext = null;

    @Override
    public void setApplicationContext(@NonNull ApplicationContext applicationContext) throws BeansException {
        setContext(applicationContext);
    }

    public static void setContext(ApplicationContext applicationContext) {
        SpringContextUtil.applicationContext = applicationContext;
    }

    public static ApplicationContext getApplicationContext() {
        return applicationContext;
    }

    /**
     * 适用于springBean使用注解@Service("xxxService")
     * 获取接口对象 参数传入xxxService
     * @param beanName
     * @return
     */
    public static Object getBean(String beanName){
        return applicationContext.getBean(beanName);
    }


    /**
     *
     * @param claz
     * @return
     */
    public static <T> T getBean(Class<T> claz){
        return applicationContext.getBean(claz);
    }

}

2. 测试方法

    public static void main(String[] args) {
        UserService userService = SpringContextUtil.getBean(UserService.class);
        String res = userService.test();
        System.out.println(res);
    }