注解的使用

1.获取特定注解ExcelProperty的字段

    //存放注解作用的字段属性
    List annotationValueList = new ArrayList<>();
    //存放实体对应所有注解
    List annotationList = new ArrayList<>();

    Field[] fields = ParamImportEntity.class.getDeclaredFields();
    for (Field field : fields) {
        Annotation[] annotations = field.getAnnotations();
        List asList = Arrays.asList(annotations);
        annotationList.addAll(asList);
    }
    for (Annotation annotation : annotationList) {
        if (annotation instanceof ExcelProperty) {
            String[] value = ((ExcelProperty) annotation).value();
            List strings = Arrays.asList(value);
            annotationValueList.addAll(strings);
        }
    }