金额转换工具类

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小写转大写

/**
 *金额大小写转换工具类
 */
 public class MoneyUtil {
 
  /** 大写数字 */
  private static final String[] NUMBERS = { "零", "壹", "贰", "叁", "肆", "伍", "陆",
      "柒", "捌", "玖" };
  /** 整数部分的单位 */
  private static final String[] IUNIT = { "元", "拾", "佰", "仟", "万", "拾", "佰",
      "仟", "亿", "拾", "佰", "仟", "万", "拾", "佰", "仟" };
  /** 小数部分的单位 */
  private static final String[] DUNIT = { "角", "分", "厘" };
 
  /**
   * 得到大写金额。
   */
  public static String toChinese(String str) {
    str = str.replaceAll(",", "");// 去掉","
    String integerStr;// 整数部分数字
    String decimalStr;// 小数部分数字
 
    // 初始化：分离整数部分和小数部分
    if (str.indexOf(".") > 0) {
      integerStr = str.substring(0, str.indexOf("."));
      decimalStr = str.substring(str.indexOf(".") + 1);
    } else if (str.indexOf(".") == 0) {
      integerStr = "";
      decimalStr = str.substring(1);
    } else {
      integerStr = str;
      decimalStr = "";
    }
    // integerStr去掉首0，不必去掉decimalStr的尾0(超出部分舍去)
    if (!integerStr.equals("")) {
      integerStr = Long.toString(Long.parseLong(integerStr));
      if (integerStr.equals("0")) {
        integerStr = "";
      }
    }
    // overflow超出处理能力，直接返回
    if (integerStr.length() > IUNIT.length) {
      System.out.println(str + ":超出处理能力");
      return str;
    }
 
    int[] integers = toArray(integerStr);// 整数部分数字
    boolean isMust5 = isMust5(integerStr);// 设置万单位
    int[] decimals = toArray(decimalStr);// 小数部分数字
    return getChineseInteger(integers, isMust5) + getChineseDecimal(decimals);
  }
 
  /**
   * 整数部分和小数部分转换为数组，从高位至低位
   */
  private static int[] toArray(String number) {
    int[] array = new int[number.length()];
    for (int i = 0; i < number.length(); i++) {
      array[i] = Integer.parseInt(number.substring(i, i + 1));
    }
    return array;
  }
 
  /**
   * 得到中文金额的整数部分。
   */
  private static String getChineseInteger(int[] integers, boolean isMust5) {
    StringBuffer chineseInteger = new StringBuffer("");
    int length = integers.length;
    for (int i = 0; i < length; i++) {
      // 0出现在关键位置：1234(万)5678(亿)9012(万)3456(元)
      // 特殊情况：10(拾元、壹拾元、壹拾万元、拾万元)
      String key = "";
      if (integers[i] == 0) {
        if ((length - i) == 13)// 万(亿)(必填)
          key = IUNIT[4];
        else if ((length - i) == 9)// 亿(必填)
          key = IUNIT[8];
        else if ((length - i) == 5 && isMust5)// 万(不必填)
          key = IUNIT[4];
        else if ((length - i) == 1)// 元(必填)
          key = IUNIT[0];
        // 0遇非0时补零，不包含最后一位
        if ((length - i) > 1 && integers[i + 1] != 0)
          key += NUMBERS[0];
      }
      chineseInteger.append(integers[i] == 0 ? key
          : (NUMBERS[integers[i]] + IUNIT[length - i - 1]));
    }
    return chineseInteger.toString();
  }
 
  /**
   * 得到中文金额的小数部分。
   */
  private static String getChineseDecimal(int[] decimals) {
    StringBuffer chineseDecimal = new StringBuffer("");
    for (int i = 0; i < decimals.length; i++) {
      // 舍去3位小数之后的
      if (i == 3)
        break;
      chineseDecimal.append(decimals[i] == 0 ? ""
          : (NUMBERS[decimals[i]] + DUNIT[i]));
    }
    return chineseDecimal.toString();
  }
 
  /**
   * 判断第5位数字的单位"万"是否应加。
   */
  private static boolean isMust5(String integerStr) {
    int length = integerStr.length();
    if (length > 4) {
      String subInteger = "";
      if (length > 8) {
        // 取得从低位数，第5到第8位的字串
        subInteger = integerStr.substring(length - 8, length - 4);
      } else {
        subInteger = integerStr.substring(0, length - 4);
      }
      return Integer.parseInt(subInteger) > 0;
    } else {
      return false;
    }
  }
 
//  public static void main(String[] args) {
//   MoneyUtil moneyUtil  = new MoneyUtil();
//   System.out.println(moneyUtil.toChinese("10001"));
//  }
 
}
大写转小写

import java.util.HashMap; 
import java.util.Map; 
   
public class CNNMFilter { 
    private static final Character[] CN_NUMERIC = { '一', '二', '三', '四', '五', 
            '六', '七', '八', '九', '壹', '贰', '叁', '肆', '伍', '陆', '柒', '捌', '玖', 
            '十', '百', '千', '拾', '佰', '仟', '万', '亿', '○', 'Ｏ', '零' }; 
   
    private static Map<Character, Integer> cnNumeric = null; 
   
    static { 
        cnNumeric = new HashMap<Character, Integer>(40, 0.85f); 
        for (int j = 0; j < 9; j++) 
            cnNumeric.put(CN_NUMERIC[j], j + 1); 
        for (int j = 9; j < 18; j++) 
            cnNumeric.put(CN_NUMERIC[j], j - 8); 
        cnNumeric.put('两', 2); 
        cnNumeric.put('十', 10); 
        cnNumeric.put('拾', 10); 
        cnNumeric.put('百', 100); 
        cnNumeric.put('佰', 100); 
        cnNumeric.put('千', 1000); 
        cnNumeric.put('仟', 1000); 
        cnNumeric.put('万', 10000); 
        cnNumeric.put('亿', 100000000); 
    } 
    public static int isCNNumeric(char c) { 
        Integer i = cnNumeric.get(c); 
        if (i == null) 
            return -1; 
        return i.intValue(); 
    } 
    public static int cnNumericToArabic(String cnn, boolean flag) { 
   
        cnn = cnn.trim(); 
        if (cnn.length() == 1) 
            return isCNNumeric(cnn.charAt(0)); 
   
        if (flag) 
            cnn = cnn.replace('佰', '百').replace('仟', '千').replace('拾', '十') 
                    .replace('零', ' '); 
        // System.out.println(cnn); 
        int yi = -1, wan = -1, qian = -1, bai = -1, shi = -1; 
        int val = 0; 
        yi = cnn.lastIndexOf('亿'); 
        if (yi > -1) { 
            val += cnNumericToArabic(cnn.substring(0, yi), false) * 100000000; 
            if (yi < cnn.length() - 1) 
                cnn = cnn.substring(yi + 1, cnn.length()); 
            else 
                cnn = ""; 
   
            if (cnn.length() == 1) { 
                int arbic = isCNNumeric(cnn.charAt(0)); 
                if (arbic <= 10) 
                    val += arbic * 10000000; 
                cnn = ""; 
            } 
        } 
   
        wan = cnn.lastIndexOf('万'); 
        if (wan > -1) { 
            val += cnNumericToArabic(cnn.substring(0, wan), false) * 10000; 
            if (wan < cnn.length() - 1) 
                cnn = cnn.substring(wan + 1, cnn.length()); 
            else 
                cnn = ""; 
            if (cnn.length() == 1) { 
                int arbic = isCNNumeric(cnn.charAt(0)); 
                if (arbic <= 10) 
                    val += arbic * 1000; 
                cnn = ""; 
            } 
        } 
   
        qian = cnn.lastIndexOf('千'); 
        if (qian > -1) { 
            val += cnNumericToArabic(cnn.substring(0, qian), false) * 1000; 
            if (qian < cnn.length() - 1) 
                cnn = cnn.substring(qian + 1, cnn.length()); 
            else 
                cnn = ""; 
            if (cnn.length() == 1) { 
                int arbic = isCNNumeric(cnn.charAt(0)); 
                if (arbic <= 10) 
                    val += arbic * 100; 
                cnn = ""; 
            } 
        } 
   
        bai = cnn.lastIndexOf('百'); 
        if (bai > -1) { 
            val += cnNumericToArabic(cnn.substring(0, bai), false) * 100; 
            if (bai < cnn.length() - 1) 
                cnn = cnn.substring(bai + 1, cnn.length()); 
            else 
                cnn = ""; 
            if (cnn.length() == 1) { 
                int arbic = isCNNumeric(cnn.charAt(0)); 
                if (arbic <= 10) 
                    val += arbic * 10; 
                cnn = ""; 
            } 
        } 
   
        shi = cnn.lastIndexOf('十'); 
        if (shi > -1) { 
            if (shi == 0) 
                val += 1 * 10; 
            else 
                val += cnNumericToArabic(cnn.substring(0, shi), false) * 10; 
            if (shi < cnn.length() - 1) 
                cnn = cnn.substring(shi + 1, cnn.length()); 
            else 
                cnn = ""; 
        } 
   
        cnn = cnn.trim(); 
        for (int j = 0; j < cnn.length(); j++) 
            val += isCNNumeric(cnn.charAt(j)) 
                    * Math.pow(10, cnn.length() - j - 1); 
   
        return val; 
    } 
   
    public static int qCNNumericToArabic(String cnn) { 
        int val = 0; 
        cnn = cnn.trim(); 
        for (int j = 0; j < cnn.length(); j++) 
            val += isCNNumeric(cnn.charAt(j)) 
                    * Math.pow(10, cnn.length() - j - 1); 
        return val; 
    } 
   
    public static void main(String[] args) { 
        int val = 0; 
        long s = System.nanoTime(); 
        val = cnNumericToArabic("三亿二千零六万七千五百六", true); 
        System.out.println(val); 
        val = cnNumericToArabic("一九九八", true); 
        System.out.println(val); 
        long e = System.nanoTime(); 
        System.out.format("Done[" + val + "], cost: %.5fsec\n", 
                ((float) (e - s)) / 1E9); 
    } 
   
}