springboot使用反射后@Autowired 失效问题解决-蒲公英云

springboot使用反射后@Autowired 失效问题解决

我写在注释里面了,看看能不能看懂

//通过反射获得类对象,注意不能 new 否则为空
  Class<?> aClass = Class.forName("com.seven.handlers." + s);
String simpleName = aClass.getSimpleName();
//类名前缀大写转换
String firstLowerName  = simpleName.substring(0, 1).toLowerCase() + simpleName.substring(1);
                /**
                 * 只会扫描带@Component注解的
                 */
Object obj = MianMianApplication.SpringContextUtil.getBean(firstLowerName, aClass);
          此时的OBj就是咱们想要的反射

配置文件如下

@Component
    @Lazy(value=false)
    public static class SpringContextUtil implements ApplicationContextAware {
        // Spring应用上下文环境
        private static ApplicationContext applicationContext;
        /**
         * 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
         */
        @Override
        public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
            SpringContextUtil.applicationContext = applicationContext;
        }
        /**
         * @return ApplicationContext
         */
        public static ApplicationContext getApplicationContext() {
            return applicationContext;
        }
        /**
         * 获取对象
         *
         * @param name
         * @return Object
         * @throws BeansException
         */
        public static Object getBean(String name) throws BeansException {
            return applicationContext.getBean(name);
        }
        public static Object getBean(String name, Class cla) throws BeansException {
            return applicationContext.getBean(name, cla);
        }
    }