金额转换，阿拉伯数字的金额转换成中国传统的形式

 

package com.fourstar.test;

import java.text.NumberFormat;
import java.util.HashMap;

public class SimpleMoneyFormat {
    public static final String EMPTY = "";
    public static final String ZERO = "零";
    public static final String ONE = "壹";
    public static final String TWO = "贰";
    public static final String THREE = "叁";
    public static final String FOUR = "肆";
    public static final String FIVE = "伍";
    public static final String SIX = "陆";
    public static final String SEVEN = "柒";
    public static final String EIGHT = "捌";
    public static final String NINE = "玖";
    public static final String TEN = "拾";
    public static final String HUNDRED = "佰";
    public static final String THOUSAND = "仟";
    public static final String TEN_THOUSAND = "万";
    public static final String HUNDRED_MILLION = "亿";
    public static final String YUAN = "元";
    public static final String JIAO = "角";
    public static final String FEN = "分";
    public static final String DOT = ".";

    public static SimpleMoneyFormat formatter = null;
    private HashMap chineseNumberMap = new HashMap();
    private HashMap chineseMoneyPattern = new HashMap();
    private NumberFormat numberFormat = NumberFormat.getInstance();

    private SimpleMoneyFormat() {
        numberFormat.setMaximumFractionDigits(4);
        numberFormat.setMinimumFractionDigits(2);
        numberFormat.setGroupingUsed(false);
        chineseNumberMap.put("0", ZERO);
        chineseNumberMap.put("1", ONE);
        chineseNumberMap.put("2", TWO);
        chineseNumberMap.put("3", THREE);
        chineseNumberMap.put("4", FOUR);
        chineseNumberMap.put("5", FIVE);
        chineseNumberMap.put("6", SIX);
        chineseNumberMap.put("7", SEVEN);
        chineseNumberMap.put("8", EIGHT);
        chineseNumberMap.put("9", NINE);
        chineseNumberMap.put(DOT, DOT);

        chineseMoneyPattern.put("1", TEN);
        chineseMoneyPattern.put("2", HUNDRED);
        chineseMoneyPattern.put("3", THOUSAND);
        chineseMoneyPattern.put("4", TEN_THOUSAND);
        chineseMoneyPattern.put("5", TEN);
        chineseMoneyPattern.put("6", HUNDRED);
        chineseMoneyPattern.put("7", THOUSAND);
        chineseMoneyPattern.put("8", HUNDRED_MILLION);
    }

    public static SimpleMoneyFormat getInstance() {
        if (formatter == null) {
            formatter = new SimpleMoneyFormat();
        }
        return formatter;
    }

    public String format(String moneyStr) {
        checkPrecision(moneyStr);
        String result;
        result = converToChineseNumber(moneyStr);
        result = addUnitsToChineseMoneyString(result);
        return result;
    }

    public String format(double moneyDouble) {
        return format(numberFormat.format(moneyDouble));
    }

    public String format(int moneyInt) {
        return format(numberFormat.format(moneyInt));
    }

    public String format(long moneyLong) {
        return format(numberFormat.format(moneyLong));
    }

    public String format(Number moneyNum) {
        return format(numberFormat.format(moneyNum));
    }

    private String addUnitsToChineseMoneyString(String moneyStr) {
        String result;
        StringBuffer cMoneyStringBuffer = new StringBuffer(moneyStr);
        int indexOfDot = cMoneyStringBuffer.indexOf(DOT);
        cMoneyStringBuffer.replace(indexOfDot, indexOfDot+1, YUAN);
        cMoneyStringBuffer.insert(cMoneyStringBuffer.length()-1, JIAO);
        cMoneyStringBuffer.insert(cMoneyStringBuffer.length(),FEN);
        if(cMoneyStringBuffer.indexOf("零角零分")!=-1)cMoneyStringBuffer.replace(cMoneyStringBuffer.indexOf("零角零分"), cMoneyStringBuffer.length(), "整");
        if(cMoneyStringBuffer.indexOf("零分")!=-1)cMoneyStringBuffer.replace(cMoneyStringBuffer.indexOf("零分"), cMoneyStringBuffer.length(), "整");
        if(cMoneyStringBuffer.indexOf("零角")!=-1)cMoneyStringBuffer.delete(cMoneyStringBuffer.indexOf("零角"), cMoneyStringBuffer.indexOf("零角")+2);
        result = cMoneyStringBuffer.toString();
        return result;
    }

    private String converToChineseNumber(String moneyStr) {
        String result;
        StringBuffer cMoneyStringBuffer = new StringBuffer();
        for (int i = 0; i < moneyStr.length(); i++) {
            cMoneyStringBuffer.append(chineseNumberMap.get(moneyStr.substring(i, i + 1)));
        }
        int indexOfDot = cMoneyStringBuffer.indexOf(DOT);
        int moneyPatternCursor = 1;
        for(int i = indexOfDot-1;i>0;i--){
            cMoneyStringBuffer.insert(i, chineseMoneyPattern.get(EMPTY+ moneyPatternCursor));
            moneyPatternCursor = moneyPatternCursor == 8?1:moneyPatternCursor+1;
        }
        String fractionPart = cMoneyStringBuffer.substring(cMoneyStringBuffer.indexOf("."));
        cMoneyStringBuffer.delete(cMoneyStringBuffer.indexOf("."), cMoneyStringBuffer.length());
        while(cMoneyStringBuffer.indexOf("零拾")!=-1){
            cMoneyStringBuffer.replace(cMoneyStringBuffer.indexOf("零拾"),cMoneyStringBuffer.indexOf("零拾")+2,ZERO);
        }
        while(cMoneyStringBuffer.indexOf("零佰")!=-1){
            cMoneyStringBuffer.replace(cMoneyStringBuffer.indexOf("零佰"),cMoneyStringBuffer.indexOf("零佰")+2,ZERO);
        }
        while(cMoneyStringBuffer.indexOf("零仟")!=-1){
            cMoneyStringBuffer.replace(cMoneyStringBuffer.indexOf("零仟"),cMoneyStringBuffer.indexOf("零仟")+2,ZERO);
        }
        while(cMoneyStringBuffer.indexOf("零万")!=-1){
            cMoneyStringBuffer.replace(cMoneyStringBuffer.indexOf("零万"),cMoneyStringBuffer.indexOf("零万")+2,TEN_THOUSAND);
        }
        while(cMoneyStringBuffer.indexOf("零亿")!=-1){
            cMoneyStringBuffer.replace(cMoneyStringBuffer.indexOf("零亿"),cMoneyStringBuffer.indexOf("零亿")+2,HUNDRED_MILLION);
        }
        while(cMoneyStringBuffer.indexOf("零零")!=-1){
            cMoneyStringBuffer.replace(cMoneyStringBuffer.indexOf("零零"),cMoneyStringBuffer.indexOf("零零")+2,ZERO);
        }
        if(cMoneyStringBuffer.lastIndexOf(ZERO)==cMoneyStringBuffer.length()-1)cMoneyStringBuffer.delete(cMoneyStringBuffer.length()-1, cMoneyStringBuffer.length());
        cMoneyStringBuffer.append(fractionPart);
        result = cMoneyStringBuffer.toString();
        return result;
    }

    private void checkPrecision(String moneyStr) {
        int fractionDigits = moneyStr.length() - moneyStr.indexOf(DOT) - 1;
        if (fractionDigits > 2)throw new RuntimeException("金额" + moneyStr + "的小数位多于两位。");
    }




    public static void main(String args[]){
        System.out.println(new SimpleMoneyFormat().format(87654321234567890.01));
    }

}