枚举类转集合List

Posted 2022-02-26 做猪呢，最重要的是开森啦

1. 工具类：

org.apache.commons.lang3.EnumUtils;

2. 举个栗子：

 2.1. 枚举类：

@Getter
@AllArgsConstructor
public enum RefundSortEnum 

    RETURN_ORDER_DATE(1, "returnOrderDate"),

    RETURNABLE_TOTAL(2, "returnableTotal"),

    RETURN_TOTAL(3, "returnTotal"),

    REFUNDED_AMOUNT(4, "refundedAmount"),

    REFUNDABLE_AMOUNT(5, "refundableAmount"),

    REFUND_TOTAL_AMOUNT(6, "refundTotalAmount");

    private Integer code;
    private String value;

 2.2. 转换：

• EnumUtils.getEnumList返回的结果是枚举类的集合，
• 如需要属性集合，可以通过lambda再进行转化，也很简洁

    public static void main(String[] args) 
        Stopwatch stopwatch = Stopwatch.createStarted();
        
        List<String> nameList = EnumUtils.getEnumList(RefundSortEnum.class).stream().map(m -> m.name()).collect(Collectors.toList());
        System.out.println(nameList);
        List<String> valueList = EnumUtils.getEnumList(RefundSortEnum.class).stream().map(m -> m.getValue()).collect(Collectors.toList());
        System.out.println(valueList);
        List<String> flierList = EnumUtils.getEnumList(RefundSortEnum.class).stream().filter(v -> v.getCode() > 3).map(m -> m.name()).collect(Collectors.toList());
        System.out.println(flierList);
		// 判断某个枚举是否在枚举类中
        System.out.println(EnumUtils.isValidEnum(RefundSortEnum.class, "RETURN_TOTAL"));

        System.out.println(stopwatch.elapsed(TimeUnit.MILLISECONDS));
    

 2.3. 结果：

[RETURN_ORDER_DATE, RETURNABLE_TOTAL, RETURN_TOTAL, REFUNDED_AMOUNT, REFUNDABLE_AMOUNT, REFUND_TOTAL_AMOUNT]
[returnOrderDate, returnableTotal, returnTotal, refundedAmount, refundableAmount, refundTotalAmount]
[REFUNDED_AMOUNT, REFUNDABLE_AMOUNT, REFUND_TOTAL_AMOUNT]
true
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