java 数字转英文

xiaoxiao2021-02-28  23

package com.ls.it.day4; public class NumberParser { public static void main(String[] args) { System.out.println( NumberParser.parse("123456789")); } public static String parse(String x) { int z = x.indexOf("."); // 取小数点位置 String lstr = "", rstr = ""; if (z > -1) { // 看是否有小数,如果有,则分别取左边和右边 lstr = x.substring(0, z); rstr = x.substring(z + 1); } else // 否则就是全部 lstr = x; String lstrrev = reverse(lstr); // 对左边的字串取反 String[] a = new String[5]; // 定义5个字串变量来存放解析出来的叁位一组的字串 switch (lstrrev.length() % 3) { case 1 : lstrrev += "00"; break; case 2 : lstrrev += "0"; break; } String lm = ""; // 用来存放转换後的整数部分 for (int i = 0; i < lstrrev.length() / 3; i++) { a[i] = reverse(lstrrev.substring(3 * i, 3 * i + 3)); // 截取第一个叁位 if (!a[i].equals("000")) { // 用来避免这种情况:1000000 = one million thousand only if (i != 0) lm = transThree(a[i]) + " " + parseMore(String.valueOf(i)) + " " + lm; // 加: thousand、million、billion else lm = transThree(a[i]); // 防止i=0时, 在多加两个空格. } else lm += transThree(a[i]); } String xs = ""; // 用来存放转换後小数部分 if (z > -1) xs = "AND CENTS " + transTwo(rstr) + " "; // 小数部分存在时转换小数 //return lm.trim() + " " + xs + "ONLY"; return lm.trim() + " " + xs ; } private static String parseFirst(String s) { String[] a = new String[] { "", "ONE", "TWO", "THREE", "FOUR", "FIVE", "SIX", "SEVEN", "EIGHT", "NINE" }; return a[Integer.parseInt(s.substring(s.length() - 1))]; } private static String parseTeen(String s) { String[] a = new String[] { "TEN", "ELEVEN", "TWELEVE", "THIRTEEN", "FOURTEEN", "FIFTEEN", "SIXTEEN", "SEVENTEEN", "EIGHTEEN", "NINETEEN" }; return a[Integer.parseInt(s) - 10]; } private static String parseTen(String s) { String[] a = new String[] { "TEN", "TWENTY", "THIRTY", "FORTY", "FIFTY", "SIXTY", "SEVENTY", "EIGHTY", "NINETY" }; return a[Integer.parseInt(s.substring(0, 1)) - 1]; } // 两位 private static String transTwo(String s) { String value = ""; // 判断位数 if (s.length() > 2) s = s.substring(0, 2); else if (s.length() < 2) s = "0" + s; if (s.startsWith("0")) // 07 - seven 是否小於10 value = parseFirst(s); else if (s.startsWith("1")) // 17 seventeen 是否在10和20之间 value = parseTeen(s); else if (s.endsWith("0")) // 是否在10与100之间的能被10整除的数 value = parseTen(s); else value = parseTen(s) + " " + parseFirst(s); return value; } private static String parseMore(String s) { String[] a = new String[] { "", "THOUSAND", "MILLION", "BILLION" }; return a[Integer.parseInt(s)]; } // 制作叁位的数 // s.length = 3 private static String transThree(String s) { String value = ""; if (s.startsWith("0")) // 是否小於100 value = transTwo(s.substring(1)); else if (s.substring(1).equals("00")) // 是否被100整除 value = parseFirst(s.substring(0, 1)) + " HUNDRED"; else value = parseFirst(s.substring(0, 1)) + " HUNDRED AND " + transTwo(s.substring(1)); return value; } private static String reverse(String s) { char[] aChr = s.toCharArray(); StringBuffer tmp = new StringBuffer(); for (int i = aChr.length - 1; i >= 0; i--) { tmp.append(aChr[i]); } return tmp.toString(); } }
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