推广部分大改

pluss-common-bundle/src/main/java/cn/pluss/platform/util/N.java

@@ -0,0 +1,47 @@
+package cn.pluss.platform.util;
+
+import java.math.BigDecimal;
+
+import static java.math.BigDecimal.ROUND_DOWN;
+
+public class N {
+
+    public static final int SCALE = 6;
+
+    public static final boolean isZero(BigDecimal num) {
+        return num == null || BigDecimal.ZERO.compareTo(num) == 0;
+    }
+
+    public static final boolean isNull(BigDecimal num) {
+        return num == null;
+    }
+
+
+    public static final boolean eq(BigDecimal n1, BigDecimal n2) {
+        return (!isNull(n1) && !isNull(n2) && n1.compareTo(n2) == 0);//n1==n2
+    }
+
+    public static final boolean gt(BigDecimal n1, BigDecimal n2) {
+        return (!isNull(n1) && !isNull(n2) && n1.compareTo(n2) > 0);//n1>n2
+    }
+
+    public static final boolean egt(BigDecimal n1, BigDecimal n2) {
+        return (!isNull(n1) && !isNull(n2) && n1.compareTo(n2) >= 0);
+    }
+
+
+    public static final BigDecimal mul(BigDecimal b1, BigDecimal b2) {
+        if (isNull(b1) || isNull(b2))
+            throw new IllegalArgumentException();
+
+        return b1.multiply(b2).setScale(SCALE, ROUND_DOWN);
+    }
+
+
+    public static final BigDecimal div(BigDecimal b1, BigDecimal b2) {
+        if (isNull(b1) || isZero(b2))
+            throw new IllegalArgumentException();
+
+        return b1.divide(b2, SCALE, ROUND_DOWN);
+    }
+}