commons-lang3：EnumUtils

枚舉工具類

getEnum(Class<E> enumClass, String enumName) 經過類返回一個枚舉，可能返回空

getEnumList(Class<E> enumClass) 經過類返回一個枚舉集合

getEnumMap(Class<E> enumClass) 經過類返回一個枚舉map

isValidEnum(Class<E> enumClass, String enumName) 驗證enumName是否在枚舉中，返回true false

demo

枚舉類
public enum ImagesTypeEnum {
    JPG,JPEG,PNG,GIF;
}

測試
        ImagesTypeEnum imagesTypeEnum = EnumUtils.getEnum(ImagesTypeEnum.class, "JPG");
        System.out.println("imagesTypeEnum = " + imagesTypeEnum);
        System.out.println("--------------");
        List<ImagesTypeEnum> imagesTypeEnumList = EnumUtils.getEnumList(ImagesTypeEnum.class);
        imagesTypeEnumList.stream().forEach(
                imagesTypeEnum1 -> System.out.println("imagesTypeEnum1 = " + imagesTypeEnum1)
        );
        System.out.println("--------------");
        Map<String, ImagesTypeEnum> imagesTypeEnumMap = EnumUtils.getEnumMap(ImagesTypeEnum.class);
        imagesTypeEnumMap.forEach((k, v) -> System.out.println("key：" + k + ",value：" + v));
        System.out.println("-------------");
        boolean result = EnumUtils.isValidEnum(ImagesTypeEnum.class, "JPG");
        System.out.println("result = " + result);
        boolean result1 = EnumUtils.isValidEnum(ImagesTypeEnum.class, null);
        System.out.println("result1 = " + result1);

測試結果

imagesTypeEnum = JPG
--------------
imagesTypeEnum1 = JPG
imagesTypeEnum1 = JPEG
imagesTypeEnum1 = PNG
imagesTypeEnum1 = GIF
--------------
key：JPG,value：JPG
key：JPEG,value：JPEG
key：PNG,value：PNG
key：GIF,value：GIF
-------------
result = true
result1 = false