NumbericUtil工具类（实现数字及数字格式化的基本功能：精确的加减乘除法、金额数字转 成中文等。）
2024-04-24 14:43:40
package com.common;import java.math.BigDecimal;
import java.text.DecimalFormat;
import java.text.NumberFormat;
import java.text.ParseException;public class NumericUtil {// 默认除法运算精度private static final int DEF_DIV_SCALE = 10;//字母随机数组，去除了i，o等歧义字母final static String[] letters = {"a","b","c","d","e","f","g","h","j","k","m","n","p","q","r","s","t","u","v","w","x","y"};//数字随机数组，去除了0和1等歧义数字final static String[] numbers = {"2","3","4","5","6","7","8","9"};/*** 构造函数.*/protected NumericUtil() {}/*** 提供精确的加法运算。* * @param v1* 被加数* @param v2* 加数* @return 两个参数的和* @author: lovem* @修改记录： ==============================================================<br>* 日期:2018-06-17 lovem 创建方法，并实现其功能* ==============================================================<br>*/public static double add(final double v1, final double v2) {final BigDecimal b1 = new BigDecimal(Double.toString(v1));final BigDecimal b2 = new BigDecimal(Double.toString(v2));return b1.add(b2).doubleValue();}/*** 提供精确的减法运算。* * @param v1* 被减数* @param v2* 减数* @return 两个参数的差* @author: lovem* @修改记录： ==============================================================<br>* 日期:2018-06-17 lovem 创建方法，并实现其功能* ==============================================================<br>*/public static double subtract(final double v1, final double v2) {final BigDecimal b1 = new BigDecimal(Double.toString(v1));final BigDecimal b2 = new BigDecimal(Double.toString(v2));return b1.subtract(b2).doubleValue();}/*** 提供精确的乘法运算。* * @param v1* 被乘数* @param v2* 乘数* @return 两个参数的积* @author: lovem* @修改记录： ==============================================================<br>* 日期:2018-06-17 lovem 创建方法，并实现其功能* ==============================================================<br>*/public static double multiply(final double v1, final double v2) {final BigDecimal b1 = new BigDecimal(Double.toString(v1));final BigDecimal b2 = new BigDecimal(Double.toString(v2));return b1.multiply(b2).doubleValue();}/*** 提供（相对）精确的除法运算，当发生除不尽的情况时，精确到 小数点以后10位，以后的数字四舍五入。* * @param v1* 被除数* @param v2* 除数* @return double* @author: lovem* @修改记录： ==============================================================<br>* 日期:2018-06-17 lovem 创建方法，并实现其功能* ==============================================================<br>*/public static double divide(final double v1, final double v2) {return NumericUtil.divide(v1, v2, NumericUtil.DEF_DIV_SCALE);}/*** 提供（相对）精确的除法运算。当发生除不尽的情况时，由scale参数指 定精度，以后的数字四舍五入。* * @param v1* 被除数* @param v2* 除数* @param scale* 表示表示需要精确到小数点以后几位。* @return double 两个参数的商* @author: lovem* @修改记录： ==============================================================<br>* 日期:2018-06-17 lovem 创建方法，并实现其功能* ==============================================================<br>*/public static double divide(final double v1, final double v2, final int scale) {if (scale < 0) {throw new IllegalArgumentException("The scale must be a positive integer or zero");}final BigDecimal b1 = new BigDecimal(Double.toString(v1));final BigDecimal b2 = new BigDecimal(Double.toString(v2));return b1.divide(b2, scale, BigDecimal.ROUND_HALF_UP).doubleValue();}/*** 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* @param scale* 小数点后保留几位* @return 四舍五入后的结果* @author: lovem* @修改记录： ==============================================================<br>* 日期:2018-06-17 lovem 创建方法，并实现其功能* ==============================================================<br>*/public static double round(final double v, final int scale) {if (scale < 0) {throw new IllegalArgumentException("The scale must be a positive integer or zero");}final BigDecimal b = new BigDecimal(Double.toString(v));final BigDecimal one = new BigDecimal("1");return b.divide(one, scale, BigDecimal.ROUND_HALF_UP).doubleValue();}/*** 将数字金额(BigDecimal类型)转换为中文金额.* * @param bigdMoneyNumber* 转换前的数字金额* @return String 中文金额* @author: lovem* @修改记录： ==============================================================<br>* 日期:2018-06-17 lovem 创建方法，并实现其功能* ==============================================================<br>*/public static String lowerToUpperOfMoney(final BigDecimal bigdMoneyNumber) {final String[] straChineseUnit = new String[] {"分", "角", "圆", "拾", "佰", "仟", "万", "拾", "佰","仟", "亿", "拾", "佰", "仟" };// 中文数字字符数组final String[] straChineseNumber = new String[] {"零", "壹", "贰", "叁", "肆", "伍", "陆", "柒","捌", "玖" };String strChineseCurrency = "";// 零数位标记boolean bZero = true;// 中文金额单位下标int chineseUnitIndex = 0;try {if (bigdMoneyNumber.intValue() == 0) {return "零圆整";}// 处理小数部分，四舍五入double doubMoneyNumber = Math.round(bigdMoneyNumber.doubleValue() * 100);// 是否负数final boolean bNegative = doubMoneyNumber < 0;// 取绝对值doubMoneyNumber = Math.abs(doubMoneyNumber);// 循环处理转换操作while (doubMoneyNumber > 0) {// 整的处理(无小数位)if (chineseUnitIndex == 2 && strChineseCurrency.length() == 0) {strChineseCurrency = strChineseCurrency + "整";}// 非零数位的处理if (doubMoneyNumber % 10 > 0) {strChineseCurrency = straChineseNumber[(int) doubMoneyNumber % 10]+ straChineseUnit[chineseUnitIndex] + strChineseCurrency;bZero = false;} else { // 零数位的处理// 元的处理(个位)if (chineseUnitIndex == 2) {// 段中有数字if (doubMoneyNumber > 0) {strChineseCurrency = straChineseUnit[chineseUnitIndex]+ strChineseCurrency;bZero = true;}} else if (chineseUnitIndex == 6 || chineseUnitIndex == 10) { // 万、亿数位的处理// 段中有数字if (doubMoneyNumber % 1000 > 0) {strChineseCurrency = straChineseUnit[chineseUnitIndex]+ strChineseCurrency;}}// 前一数位非零的处理if (!bZero) {strChineseCurrency = straChineseNumber[0] + strChineseCurrency;}bZero = true;}doubMoneyNumber = Math.floor(doubMoneyNumber / 10);chineseUnitIndex++;}// 负数的处理if (bNegative) {strChineseCurrency = "负" + strChineseCurrency;}} catch (final Exception e) {return "";}return strChineseCurrency;}/*** 将小写金额(double类型)转化为人民币大写格式.* * @param je* 转换前的小写数字金额* @return String 中文金额* @author: lovem* @修改记录： ==============================================================<br>* 日期:2018-06-17 lovem 创建方法，并实现其功能* ==============================================================<br>*/public static String lowerToUpperOfMoney(final double je) {String money = ""; // 转换后的字符串final String num = "零壹贰叁肆伍陆柒捌玖";final String[] unit = {"元", "拾", "佰", "仟", "万", "拾万", "佰万", "仟万", "亿", "拾亿", "佰亿", "仟亿" };String s = String.valueOf(je); // 将金额转换为字符串final int a = s.indexOf("+"); // 判断s是否包含'+',如1.67E+4final int e = s.indexOf("E"); // 判断s是否包含'E',如1.67E+4if (je == 0.00) {return money;}// 如果包含'E'(该金额是以科学记数法表示,则转换成普通表示法)if (e != -1) {int index = 0; // 指数值if (a == -1) {index = Integer.parseInt(s.substring(e + 1)); // 取得指数值} else {index = Integer.parseInt(s.substring(a + 1)); // 取得指数值}final String sub1 = s.substring(0, e); // 取得尾数值final int dot = sub1.indexOf("."); // 尾数的小数点位置// 如果不含有小数点,则在后面补index个'0'if (dot == -1) {for (int i = 1; i <= index; i++) {s = sub1 + "0";}} else { // 如果含有小数点,则向后移动小数点index位final String sub11 = sub1.substring(0, dot); // 小数点前面的字串String sub12 = sub1.substring(dot + 1); // 小数点后面的字串if (index >= sub12.length()) {final int j = index - sub12.length();for (int i = 1; i <= j; i++) {sub12 = sub12 + "0";}} else {sub12 = sub12.substring(0, index) + "." + sub12.substring(index);}s = sub11 + sub12;}}final int sdot = s.indexOf("."); // s中小数点的位置String beforeDot = ""; // 小数点前面的字串String afterDot = ""; // 小数点后面的字串// 如果包含小数点if (sdot != -1) {beforeDot = s.substring(0, sdot);afterDot = s.substring(sdot + 1);} else { // 不包含小数点beforeDot = s;}final int bl = beforeDot.length();boolean zero = false; // 数字是否为零int z = 0; // '0'的个数// 逐位取数字for (int j = 0, i = bl - 1; j <= bl - 1; j++, i--) {final int number = Integer.parseInt(String.valueOf(beforeDot.charAt(j)));if (number == 0) {zero = true;z++;} else {zero = false;z = 0;}if (zero && z == 1) {money += "零";} else if (zero) {} else if (!zero) {money += num.substring(number, number + 1) + unit[i];}}// 删去多余的'万'和'亿'for (int i = 1; i <= 2; i++) {String ss = "";if (i == 1) {ss = "万";} else {ss = "亿";}final int last = money.lastIndexOf(ss);if (last != -1) {String moneySub1 = money.substring(0, last);final String moneySub2 = money.substring(last, money.length());int last2 = moneySub1.indexOf(ss);while (last2 != -1) {moneySub1 = moneySub1.substring(0, last2)+ moneySub1.substring(last2 + 1, moneySub1.length());last2 = moneySub1.indexOf(ss);}money = moneySub1 + moneySub2;}}// money中是否包含'元'final int yuan = money.indexOf("元");// 如果不包含'元'if (yuan == -1) {final int zi = money.lastIndexOf("零");// 如果最后一位字符为'零',则删除它if (zi == money.length() - 1) {money = money.substring(0, money.length() - 1) + "元"; // 在money最后加上'元'}}// 如果小数点后面的字串不为空,则处理'角','分'if (!afterDot.equals("")) {int al = afterDot.length();if (al > 2) { // 如果字串长度大于2,则截断afterDot = afterDot.substring(0, 2);al = afterDot.length();}// 如果字符串不为'0'或'00',则处理,否则不进行处理if (!afterDot.equals("0") && !afterDot.equals("00")) {// 逐位取得字符for (int i = 0; i < al; i++) {final int number = Integer.parseInt(String.valueOf(afterDot.charAt(i)));if (number != 0 && i == 0) {money += num.substring(number, number + 1) + "角";} else if (number != 0 && i == 1) {money += num.substring(number, number + 1) + "分";} else if (number == 0 && i == 0) {money += "零";}}}}// 如果不包含'角','分'则在最后加上'整'字if (money.indexOf("角") == -1 && money.indexOf("分") == -1) {money += "整";}return money;}/*** 将double数转化为指定位数的字符串.* * @param num* 待转换的float数* @param digits* 小数点后的位数* @return String 指定小数位数的字符串* @author: lovem* @修改记录： ==============================================================<br>* 日期:2018-06-17 lovem 创建方法，并实现其功能* ==============================================================<br>*/public static String getNumberFormat(final float num, final int digits) {String thenum;final NumberFormat nf = NumberFormat.getInstance();nf.setMaximumFractionDigits(digits);nf.setMinimumFractionDigits(digits);thenum = nf.format(num).toString();return thenum;}/*** 将double数转化为指定位数的字符串.<br>* 例如： NumericUtil.getNumberFormat(123456.12345,3)* 的结果为123,456.123，注意小数点最后一位四舍五入* * @param num* 待转换的double数* @param digits* 小数点后的位数* @return String 指定小数位数的字符串* @author: lovem* @修改记录： ==============================================================<br>* 日期2018-06-17 lovem 创建方法，并实现其功能* ==============================================================<br>*/public static String getNumberFormat(final double num, final int digits) {String thenum;final NumberFormat nf = NumberFormat.getInstance();nf.setMaximumFractionDigits(digits);nf.setMinimumFractionDigits(digits);thenum = nf.format(num).toString();return thenum;}/*** 将BigDecimal数转化为指定位数的字符串.<br>* 例如： NumericUtil.getNumberFormat(new BigDecimal(123456.12345),3)* 的结果为123,456.123，注意小数点最后一位四舍五入* * @param num* 待转换的BigDecimal数* @param digits* 小数点后的位数* @return String 指定小数位数的字符串* @author: lovem* @修改记录： ==============================================================<br>* 日期:2018-06-17 lovem 创建方法，并实现其功能* ==============================================================<br>*/public static String getNumberFormat(BigDecimal num, final int digits) {String thenum = "";if (num == null) {num = new BigDecimal(0);}try {final NumberFormat nf = NumberFormat.getInstance();nf.setMaximumFractionDigits(digits);nf.setMinimumFractionDigits(digits);thenum = nf.format(num).toString();} catch (final NumberFormatException nfex) {throw new NumberFormatException(nfex.toString());}return thenum;}/*** 格式字符串为double输出.* * @param lpNumberFormat* 待格式化的字符串* @return double double数值* @author: lovem* @修改记录： ==============================================================<br>* 日期:2018-06-17 lovem 创建方法，并实现其功能* ==============================================================<br>*/public static double getNumberFormatStrToDouble(final String lpNumberFormat) {double lpReturnNumber = 0;final NumberFormat nf = NumberFormat.getInstance();try {final Number lpResultNumber = nf.parse(lpNumberFormat);lpReturnNumber = lpResultNumber.doubleValue();} catch (final ParseException pe) {}return lpReturnNumber;}/*** 格式字符串为float输出.* * @param lpNumberFormat* 待格式化的字符串* @return float float数值* @author: lovem* @修改记录： ==============================================================<br>* 日期:2018-06-17 lovem 创建方法，并实现其功能* ==============================================================<br>*/public static float getNumberFormatStrToFloat(final String lpNumberFormat) {float lpReturnNumber = 0;final NumberFormat nf = NumberFormat.getInstance();try {final Number lpResultNumber = nf.parse(lpNumberFormat);lpReturnNumber = lpResultNumber.floatValue();} catch (final ParseException pe) {}return lpReturnNumber;}/*** 将字符串转化为BigDecimal类型.* * @param str* 待转换的字符串* @return BigDecimal 转换后的BigDecimal，如果字符串为null， 那么BigDecimal为new* BigDecimal("0");* @author: lovem* @修改记录： ==============================================================<br>* 日期:2018-06-17 lovem 创建方法，并实现其功能* ==============================================================<br>*/public static BigDecimal toBigDecimal(String str) {BigDecimal lpReturnValue;try {if (str == null) {str = "0";}lpReturnValue = new BigDecimal(str);} catch (final NumberFormatException nfe) {lpReturnValue = new BigDecimal(0);}return lpReturnValue;}/*** 将字符串转化为double类型 Converts a string to double. If fails is not throwing a* NumberFormatException, instead return 0.* * @param str* 待转换的字符串* @return double数据* @author: lovem* @修改记录： ==============================================================<br>* 日期:2018-06-17 lovem 创建方法，并实现其功能* ==============================================================<br>*/public static double toDouble(String str) {double lpResult = 0;if (str == null) {str = "";} else {str = str.trim();}try {lpResult = Double.parseDouble(str);} catch (final NumberFormatException nfe) {}return lpResult;}/*** 将字符串转化为short类型 Converts a string to short. If fails is not throwing a* NumberFormatException, instead return 0.* * @param str* 待转换的字符串* @return int数据* @author: lovem* @修改记录： ==============================================================<br>* 日期:2018-06-17 lovem 创建方法，并实现其功能* ==============================================================<br>*/public static short toShort(String str) {short lpResult = 0;if (str == null) {str = "";} else {str = str.trim();}try {lpResult = Short.parseShort(str);} catch (final NumberFormatException nfe) {}return lpResult;}/*** 将字符串转化为int类型 Converts a string to integer. If fails is not throwing a* NumberFormatException, instead return 0.* * @param str* 待转换的字符串* @return int 数据* @author: lovem* @修改记录： ==============================================================<br>* 日期:2018-06-17 lovem 创建方法，并实现其功能* ==============================================================<br>*/public static int toInt(String str) {int lpResult = 0;if (str == null) {str = "";} else {str = str.trim();}try {lpResult = Integer.parseInt(str);} catch (final NumberFormatException nfe) {}return lpResult;}/*** 将字符串转化为float类型 Converts a string to float. If fails is not throwing a* NumberFormatException, instead return 0.* * @param str* 待转换的字符串* @return float 数据* @author: lovem* @修改记录： ==============================================================<br>* 日期:2018-06-17 lovem 创建方法，并实现其功能* ==============================================================<br>*/public static float toFloat(String str) {float lpResult = 0;if (str == null) {str = "";} else {str = str.trim();}try {lpResult = Float.parseFloat(str);} catch (final NumberFormatException nfe) {}return lpResult;}/*** 将字符串转化为long类型 Converts a string to long. If fails is not throwing a* NumberFormatException, instead return 0.* * @param str* 待转换的字符串* @return long 数据* @author: lovem* @修改记录： ==============================================================<br>* 日期:2018-06-17 lovem 创建方法，并实现其功能* ==============================================================<br>*/public static long toLong(String str) {long lpResult = 0;if (str == null) {str = "";} else {str = str.trim();}try {lpResult = Long.parseLong(str);} catch (final NumberFormatException nfe) {}return lpResult;}/*** 当变量为空时返回零.* * @param obj* Object* @return int* @author: lovem* @修改记录： ==============================================================<br>* 日期:2018-06-17 lovem 创建方法，并实现其功能* ==============================================================<br>*/public static int nullToZero(final Object obj) {int result = 0;if (obj == null || obj.toString().equals("")) {result = 0;} else {result = new Integer(obj.toString()).intValue();}return result;}/*** 当变量为空时返回零.* * @param obj* Object* @return BigDecimal* @author: lovem* @修改记录： ==============================================================<br>* 日期:2018-06-17 lovem 创建方法，并实现其功能* ==============================================================<br>*/public static BigDecimal nullToBigDecimalZero(final Object obj) {BigDecimal result = new BigDecimal("0");if (obj == null || obj.toString().equals("")) {result = new BigDecimal("0");} else {result = new BigDecimal(obj.toString());}return result;}/*** @param obj* Object* @return String* @author: lovem* @修改记录： ==============================================================<br>* 日期:2018-06-17 lovem 创建方法，并实现其功能* ==============================================================<br>*/public static String nullToStringZero(final Object obj) {BigDecimal result = new BigDecimal("0");if (obj == null || obj.toString().equals("")) {result = new BigDecimal("0");} else {result = new BigDecimal(obj.toString());}return result.toString();}/*** @param obj* Object* @return Long* @author: lovem* @修改记录： ==============================================================<br>* 日期:2018-06-17 lovem 创建方法，并实现其功能* ==============================================================<br>*/public static Long nullToLongZero(final Object obj) {Long result = new Long(0);try {if (obj == null || obj.toString().equals("")) {result = new Long(0);} else {result = new Long(obj.toString());}} catch (final Exception ex) {result = new Long(0);}return result;}public static Long nullToLongZero(final Object obj, final Long rpt) {Long result = nullToLongZero(obj);if(result == 0L){result = rpt;}return result;}public static Integer nullToIntegerZero(final Object obj) {Integer result = new Integer(0);try {if (obj == null || obj.toString().equals("")) {result = new Integer(0);} else {result = new Integer(obj.toString());}} catch (final Exception ex) {result = new Integer(0);}return result;}/*** @param obj* Double* @return Double* @author: lovem* @修改记录： ==============================================================<br>* 日期:2018-06-17 lovem 创建方法，并实现其功能* ==============================================================<br>*/public static Double nullToDoubleZero(final Double obj) {Double result = new Double(0);if (obj == null) {result = new Double(0);} else {final DecimalFormat format = new DecimalFormat("#.000");result = new Double(format.format(obj));}return result;}/*** @param obj* Object* @return Double* @author: lovem* @修改记录： ==============================================================<br>* 日期:2018-06-17 lovem 创建方法，并实现其功能* ==============================================================<br>*/public static Double nullToDoubleZero(final Object obj) {Double result = new Double(0);try {if (obj == null) {result = new Double(0);} else {result = new Double(obj.toString());}} catch (final Exception e) {}return result;}/*** 将对像转换成Float类型，当对像为空时返回0* .* * @param obj* @return* @author lovem* 2018-06-17 lovem*/public static Float nullToFloatZero(final Object obj) {Float result = new Float(0);try {if(obj != null){result = Float.valueOf(obj.toString());}} catch (final Exception e) {}return result;}/*** 方法功能:* 转换大Long为int .* @param lon 输入大Long* @return int 返回int* @author: lovem* @修改记录： * ==============================================================<br>* 日期:2018-06-17 lovem 创建方法，并实现其功能* ==============================================================<br>*/public static int toInt(Long lon) {int lpResult = 0;try {if (lon == null) {lpResult = 0;} else {lpResult = lon.intValue();}} catch (final NumberFormatException nfe) {}return lpResult;}/*** 根据密码长度和是否包含字母参数来生成随机码.* * @param length 长度* @param hasLetter 是否包含字母* @return 随机密码* @author lovem* 2018-06-17 lovem */public static String getRandomCode(int length, boolean hasLetter) {StringBuffer sb = new StringBuffer();for (int i = 0; i < length; i++) {double random = Math.random();if (hasLetter && random < 0.5 ) {Double d = new Double(random * letters.length);sb.append(letters[d.intValue()]);} else {Double d = new Double(random * numbers.length);sb.append(numbers[d.intValue()]);}}return sb.toString();}/*** @param args* String* @author: lovem* @修改记录： ==============================================================<br>* 日期:2018-06-17 lovem 创建方法，并实现其功能* ==============================================================<br>*//** public static void main(String args[]) { NumericUtil a = new* NumericUtil(); BigDecimal big = new BigDecimal(123456.12345); }*/}NumbericUtil工具类（实现数字及数字格式化的基本功能：精确的加减乘除法、金额数字转 成中文等。）相关推荐
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