From 61c2be75aa2857970b0782ba6628a4ab28cd9b06 Mon Sep 17 00:00:00 2001
From: yanglang2 <yanglang@cdzhnf.com>
Date: Wed, 29 Apr 2020 16:19:34 +0800
Subject: [PATCH] feat #增加浮点数的加减乘除的四则运算

---
 src/main/java/com/irrigation/icl/utils/DoubleValueUtils.java | 84 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 84 insertions(+), 0 deletions(-)
 create mode 100644 src/main/java/com/irrigation/icl/utils/DoubleValueUtils.java

diff --git a/src/main/java/com/irrigation/icl/utils/DoubleValueUtils.java b/src/main/java/com/irrigation/icl/utils/DoubleValueUtils.java
new file mode 100644
index 0000000..dd0357c
--- /dev/null
+++ b/src/main/java/com/irrigation/icl/utils/DoubleValueUtils.java
@@ -0,0 +1,84 @@
+package com.irrigation.icl.utils;
+
+import java.math.BigDecimal;
+import java.util.Optional;
+
+/**
+ * @description: 浮点数操作工具类
+ * @Author: yangLang
+ * @CreateDate: 2020/4/29 16:09
+ */
+public class DoubleValueUtils {
+
+    /**
+     * 保留位数
+     */
+    private final static int SCALE = 4;
+
+    private DoubleValueUtils() {
+    }
+
+    /**
+     * 计算两个浮点数之和
+     *
+     * @param value    加数
+     * @param addValue 被加数
+     * @return 返回结果四舍五入，保留4为小数
+     * @Author: yangLang
+     */
+    public static Double doubleAddEx(Double value, Double addValue) {
+        value = Optional.ofNullable(value).orElse(0.0);
+        addValue = Optional.ofNullable(addValue).orElse(0.0);
+        return new BigDecimal(value.toString()).add(new BigDecimal(addValue.toString()))
+                .setScale(SCALE, BigDecimal.ROUND_HALF_UP)
+                .doubleValue();
+    }
+
+    /**
+     * 计算两个浮点数之差
+     *
+     * @param value    减数
+     * @param addValue 被减数
+     * @return 返回结果四舍五入，保留4为小数
+     * @Author: yangLang
+     */
+    public static Double doubleSubEx(Double value, Double addValue) {
+        value = Optional.ofNullable(value).orElse(0.0);
+        addValue = Optional.ofNullable(addValue).orElse(0.0);
+        return new BigDecimal(value.toString()).subtract(new BigDecimal(addValue.toString()))
+                .setScale(SCALE, BigDecimal.ROUND_HALF_UP)
+                .doubleValue();
+    }
+
+    /**
+     * 计算两个浮点数之积
+     *
+     * @param value    乘数
+     * @param addValue 被乘数
+     * @return 返回结果四舍五入，保留4为小数
+     * @Author: yangLang
+     */
+    public static Double doubleMultiEx(Double value, Double addValue) {
+        value = Optional.ofNullable(value).orElse(0.0);
+        addValue = Optional.ofNullable(addValue).orElse(0.0);
+        return new BigDecimal(value.toString()).multiply(new BigDecimal(addValue.toString()))
+                .setScale(SCALE, BigDecimal.ROUND_HALF_UP)
+                .doubleValue();
+    }
+
+    /**
+     * 计算两个浮点数之商
+     *
+     * @param value    除数
+     * @param addValue 被除数
+     * @return 返回结果四舍五入，保留4为小数
+     * @Author: yangLang
+     */
+    public static Double doubleDivEx(Double value, Double addValue) {
+        value = Optional.ofNullable(value).orElse(0.0);
+        addValue = Optional.ofNullable(addValue).orElse(0.0);
+        return new BigDecimal(value.toString()).divide(new BigDecimal(addValue.toString()))
+                .setScale(SCALE, BigDecimal.ROUND_HALF_UP)
+                .doubleValue();
+    }
+}
--
libgit2 0.21.4