1. import java.math.BigDecimal;
    3. public class BigDecimalUtils {
    4.     public static BigDecimal doubleAdd(double v1, double v2) {
    5.         BigDecimal b1 = new BigDecimal(Double.toString(v1));
    6.         BigDecimal b2 = new BigDecimal(Double.toString(v2));
    7.         return b1.add(b2);
    8.     }
    9.     public static BigDecimal floatAdd(float v1, float v2) {
    10.         BigDecimal b1 = new BigDecimal(Float.toString(v1));
    11.         BigDecimal b2 = new BigDecimal(Float.toString(v2));
    12.         return b1.add(b2);
    13.     }
    14.     public static BigDecimal doubleSub(double v1, double v2) {
    15.         BigDecimal b1 = new BigDecimal(Double.toString(v1));
    16.         BigDecimal b2 = new BigDecimal(Double.toString(v2));
    17.         return b1.subtract(b2);
    18.     }
    19.     public static BigDecimal floatSub(float v1, float v2) {
    20.         BigDecimal b1 = new BigDecimal(Float.toString(v1));
    21.         BigDecimal b2 = new BigDecimal(Float.toString(v2));
    22.         return b1.subtract(b2);
    23.     }
    25.     public static BigDecimal doubleMul(double v1, double v2) {
    26.         BigDecimal b1 = new BigDecimal(Double.toString(v1));
    27.         BigDecimal b2 = new BigDecimal(Double.toString(v2));
    28.         return b1.multiply(b2);
    29.     }
    30.     public static BigDecimal floatMul(float v1, float v2) {
    31.         BigDecimal b1 = new BigDecimal(Float.toString(v1));
    32.         BigDecimal b2 = new BigDecimal(Float.toString(v2));
    33.         return b1.multiply(b2);
    34.     }
    36.     public static BigDecimal doubleDiv(double v1, double v2) {
    37.         BigDecimal b1 = new BigDecimal(Double.toString(v1));
    38.         BigDecimal b2 = new BigDecimal(Double.toString(v2));
    39.         // 保留小数点后两位 ROUND_HALF_UP = 四舍五入
    40.         return b1.divide(b2, 2, BigDecimal.ROUND_HALF_UP);
    41.     }
    42.     public static BigDecimal floatDiv(float v1, float v2) {
    43.         BigDecimal b1 = new BigDecimal(Float.toString(v1));
    44.         BigDecimal b2 = new BigDecimal(Float.toString(v2));
    45.         // 保留小数点后两位 ROUND_HALF_UP = 四舍五入
    46.         return b1.divide(b2, 2, BigDecimal.ROUND_HALF_UP);
    47.     }
    48.     /**
    49.      * 比较v1 v2大小
    50.      * @param v1
    51.      * @param v2
    52.      * @return v1>v2 return 1  v1=v2 return 0 v1<v2 return -1
    53.      */
    54.     public static int doubleCompareTo(double v1, double v2) {
    55.         BigDecimal b1 = new BigDecimal(Double.toString(v1));
    56.         BigDecimal b2 = new BigDecimal(Double.toString(v2));
    57.         return  b1.compareTo(b2);
    58.     }
    59.     public static int floatCompareTo(float v1, float v2) {
    60.         BigDecimal b1 = new BigDecimal(Float.toString(v1));
    61.         BigDecimal b2 = new BigDecimal(Float.toString(v2));
    62.         return  b1.compareTo(b2);
    63.     }
    64. }