From 152781b05131e48bf6e94d71cc72dd54af52a3fb Mon Sep 17 00:00:00 2001
From: houzhongjian <houzhongyi@126.com>
Date: 星期四, 10 四月 2025 14:13:29 +0800
Subject: [PATCH] 恢复iailab-framework
---
iailab-framework/iailab-common/src/main/java/com/iailab/framework/common/util/number/NumberUtils.java | 64 ++++++++++++++++++++++++++++++++
1 files changed, 64 insertions(+), 0 deletions(-)
diff --git a/iailab-framework/iailab-common/src/main/java/com/iailab/framework/common/util/number/NumberUtils.java b/iailab-framework/iailab-common/src/main/java/com/iailab/framework/common/util/number/NumberUtils.java
new file mode 100644
index 0000000..f45f673
--- /dev/null
+++ b/iailab-framework/iailab-common/src/main/java/com/iailab/framework/common/util/number/NumberUtils.java
@@ -0,0 +1,64 @@
+package com.iailab.framework.common.util.number;
+
+import cn.hutool.core.util.NumberUtil;
+import cn.hutool.core.util.StrUtil;
+
+import java.math.BigDecimal;
+
+/**
+ * 数字的工具类，补全 {@link cn.hutool.core.util.NumberUtil} 的功能
+ *
+ * @author iailab
+ */
+public class NumberUtils {
+
+ public static Long parseLong(String str) {
+ return StrUtil.isNotEmpty(str) ? Long.valueOf(str) : null;
+ }
+
+ public static Integer parseInt(String str) {
+ return StrUtil.isNotEmpty(str) ? Integer.valueOf(str) : null;
+ }
+
+ /**
+ * 通过经纬度获取地球上两点之间的距离
+ *
+ * 参考 <<a href="https://gitee.com/dromara/hutool/blob/1caabb586b1f95aec66a21d039c5695df5e0f4c1/hutool-core/src/main/java/cn/hutool/core/util/DistanceUtil.java">DistanceUtil</a>> 实现，目前它已经被 hutool 删除
+ *
+ * @param lat1 经度1
+ * @param lng1 纬度1
+ * @param lat2 经度2
+ * @param lng2 纬度2
+ * @return 距离，单位：千米
+ */
+ public static double getDistance(double lat1, double lng1, double lat2, double lng2) {
+ double radLat1 = lat1 * Math.PI / 180.0;
+ double radLat2 = lat2 * Math.PI / 180.0;
+ double a = radLat1 - radLat2;
+ double b = lng1 * Math.PI / 180.0 - lng2 * Math.PI / 180.0;
+ double distance = 2 * Math.asin(Math.sqrt(Math.pow(Math.sin(a / 2), 2)
+ + Math.cos(radLat1) * Math.cos(radLat2)
+ * Math.pow(Math.sin(b / 2), 2)));
+ distance = distance * 6378.137;
+ distance = Math.round(distance * 10000d) / 10000d;
+ return distance;
+ }
+
+ /**
+ * 提供精确的乘法运算
+ *
+ * 和 hutool {@link NumberUtil#mul(BigDecimal...)} 的差别是，如果存在 null，则返回 null
+ *
+ * @param values 多个被乘值
+ * @return 积
+ */
+ public static BigDecimal mul(BigDecimal... values) {
+ for (BigDecimal value : values) {
+ if (value == null) {
+ return null;
+ }
+ }
+ return NumberUtil.mul(values);
+ }
+
+}
--
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