add BitDecimaUtil

lib_base/src/main/java/com/android/base/utils/common/BigDecimalCalculator.java

@@ -0,0 +1,116 @@
+package com.android.base.utils.common;
+
+import java.math.BigDecimal;
+
+/**
+ * 使用 BigDecimal 计算
+ *
+ * @author Ztiany
+ * Email: 1169654504@qq.com
+ * Date : 2016-12-06 14:58
+ */
+@SuppressWarnings("unused")
+public class BigDecimalCalculator {
+
+    public static final BigDecimal ZERO = new BigDecimal("0");
+    private static final int SCALE = 2;
+
+    private BigDecimalCalculator() {
+        throw new UnsupportedOperationException();
+    }
+
+    public static BigDecimal add(BigDecimal value1, float value2) {
+        return value1.add(new BigDecimal(Float.toString(value2)));
+    }
+
+    public static BigDecimal add(float value1, float value2) {
+        return new BigDecimal(Float.toString(value1)).add(new BigDecimal(Float.toString(value2)));
+    }
+
+    public static BigDecimal multiply(BigDecimal value1, float value2) {
+        return value1.multiply(new BigDecimal(Float.toString(value2)));
+    }
+
+    public static BigDecimal multiply(float value1, float value2) {
+        return new BigDecimal(Float.toString(value1)).multiply(new BigDecimal(Float.toString(value2)));
+    }
+
+    public static BigDecimal subtract(BigDecimal value1, float value2) {
+        return value1.subtract(new BigDecimal(Float.toString(value2)));
+    }
+
+    public static BigDecimal subtract(float value1, float value2) {
+        return new BigDecimal(Float.toString(value1)).subtract(new BigDecimal(Float.toString(value2)));
+    }
+
+    public static BigDecimal divide(BigDecimal dividend, BigDecimal divisor) {
+        return dividend.divide(divisor, SCALE, BigDecimal.ROUND_HALF_UP);
+    }
+
+    public static BigDecimal divide(float dividend, BigDecimal divisor) {
+        return new BigDecimal(Float.toString(dividend)).divide(divisor, SCALE, BigDecimal.ROUND_HALF_UP);
+    }
+
+    public static BigDecimal divide(BigDecimal dividend, float divisor) {
+        return dividend.divide(new BigDecimal(Float.toString(divisor)), SCALE, BigDecimal.ROUND_HALF_UP);
+    }
+
+    public static BigDecimal divide(float dividend, float divisor) {
+        return new BigDecimal(Float.toString(dividend)).divide(new BigDecimal(Float.toString(divisor)), SCALE, BigDecimal.ROUND_HALF_UP);
+    }
+
+    /**
+     * 提供精确的小数位四舍五入处理。
+     *
+     * @param v 需要四舍五入的数字
+     * @return 四舍五入后的结果
+     */
+    public static float round(float v) {
+        BigDecimal b = new BigDecimal(Float.toString(v));
+        BigDecimal one = new BigDecimal("1");
+        return b.divide(one, SCALE, BigDecimal.ROUND_HALF_UP).floatValue();
+    }
+
+    public static BigDecimal toBigDecimal(float price) {
+        return new BigDecimal(String.valueOf(price));
+    }
+
+    public static boolean isZero(float value) {
+        return Float.compare(value, 0F) == 0;
+    }
+
+    public static boolean equals(float a, float b) {
+        return Float.compare(a, b) == 0;
+    }
+
+    /**
+     * @return a > b return true or false
+     */
+    public static boolean isGreaterThan(float a, float b) {
+        return Float.compare(a, b) == 1;
+    }
+
+    /**
+     * @return a >= b true or false
+     */
+    public static boolean isEqualsOrGreaterThan(float a, float b) {
+        int compare = Float.compare(a, b);
+        return compare != -1;
+    }
+
+    /**
+     * @return true a < b or false
+     */
+    public static boolean isLessThan(float a, float b) {
+        return Float.compare(a, b) == -1;
+    }
+
+    /**
+     * @return a <= b true or false
+     */
+    public static boolean isEqualsOrLessThan(float a, float b) {
+        int compare = Float.compare(a, b);
+        return compare != 1;
+    }
+
+}