java实现人民币数字转换成中文

public class test {

    /**

     * 人民币大写单位制

     */

    private static HashMap<Integer, String> dws;

    /**

     * 数字对应的中文

     */

    private static String[] jes;

    // 初始化执行

    static{

        dws = new HashMap<Integer, String>();

        dws.put(-2, "分");

        dws.put(-1, "角");

        dws.put(0, "元");

        dws.put(1, "拾");

        dws.put(2, "佰");

        dws.put(3, "仟");

        dws.put(4, "万");//

        dws.put(5, "拾");

        dws.put(6, "佰");

        dws.put(7, "仟");

        dws.put(8, "亿");//

        dws.put(9, "拾");

        dws.put(10, "佰");

        dws.put(11, "仟");

        dws.put(12, "万");

        jes = new String[]{"零","壹","贰","叁","肆","伍","陆","柒","捌","玖"};

    }

    /**

     * 数字转换人民币大写

     * @param number 数字 不支持科学数字

     * @return

     */

    public static String chinese(String number){

        StringBuffer su = new StringBuffer();

        // 整数部分

        number = delInvalidZero(number);

        String str = null;

        // 小数部分

        String decimal = null;

        if(number.contains(".")){

            // 截取整数位

            str = number.split("\\.")[0];

            decimal = number.split("\\.")[1];

        }else{

            str = number;

        }

        // 判断是否存在整数位

        if(str.length()>0){

            for (int i = 0; i < str.length() ; i++) {

                String context = str.substring(i, i+1);

                int pow = str.length()-i-1;

                Integer val = Integer.parseInt(context.toString());

                // 获取中文单位

                String sign = dws.get(pow);

                // 获取中文数字

                String name = jes[Integer.parseInt(context)];

                if(val==0){

                    if(pow%4!=0){// 删除单位

                        sign = "";

                    }

                    if(i < str.length()-1){

                        Integer val1 = Integer.parseInt(str.substring(i+1, i+2));

                        if(val==0&&val==val1){

                            name = "";

                        }

                    }else if(i == str.length()-1){

                        name = "";

                    }

                }

                su.append(name+sign);

            }

        }

        // 判断是否存在小数位

        if(decimal!=null){

            str = decimal.substring(0,1);

            if(!"0".equals(str)){

                su.append(jes[Integer.parseInt(str)]+dws.get(-1));

            }

            if(decimal.length()==2){

                str = decimal.substring(1,2);

                if(!"0".equals(str)){

                    su.append(jes[Integer.parseInt(str)]+dws.get(-2));

                }

            }

        }else{

            su.append("整");

        }

        return su.toString();

    }

    /**

     * 清理数字特殊字符

     * @param str

     * @return

     */

    private static String delInvalidZero(String str){

        if("0".equals(str.substring(0, 1))){

            return delInvalidZero(str.substring(1, str.length()));

        }else if(str.contains(",")){

            return delInvalidZero(str.replaceAll(",", ""));

        }else{

            return str;

        }

    }

    public static void main(String[] args) {

        System.out.println(test.chinese("12.5"));

    }

}