package org.quickbundle.tools.helper.math; import java.text.DecimalFormat; import java.util.regex.Matcher; import java.util.regex.Pattern; import org.quickbundle.config.RmBaseConfig; public class RmNumberHelper { /** * 千分位匹配 */ private static Pattern thousandsSeparatePattern = Pattern.compile("(\\d{1,3})(?=(\\d{3})+(?:$|\\D))"); /** * 格式化为千分位 * * @param value * @return */ public static String formatToThousandth(String value) { return formatToThousandth(value, RmBaseConfig.getSingleton().getDefaultNumberScale(), ","); } /** * 格式化为千分位 * * @param value * @param decimalPrecision * @param thousandsSeparator * @return */ public static String formatToThousandth(String value, int decimalPrecision, String thousandsSeparator) { if (value == null || value.length() == 0) { value = "0"; } else { value = formatFromThousandth(value); } if(decimalPrecision < 0) { decimalPrecision = 0; } StringBuilder pattern = new StringBuilder(); pattern.append("0."); for (int i = 0; i < decimalPrecision; i++) { pattern.append("0"); } value = new DecimalFormat(pattern.toString()).format(Double.parseDouble(value)); if(decimalPrecision > 0) { String integerPart = value.split("\\.")[0]; String decimalPart = value.split("\\.")[1]; Matcher matcher = thousandsSeparatePattern.matcher(integerPart); integerPart = matcher.replaceAll("$1" + thousandsSeparator); value = integerPart + "." + decimalPart; } else { Matcher matcher = thousandsSeparatePattern.matcher(value.replaceAll("\\.$", "")); value = matcher.replaceAll("$1" + thousandsSeparator); } return value; } /** * 从千分位转化为普通数字格式 * * @param str * @return */ public static String formatFromThousandth(String value) { return value.replaceAll(",", ""); } }