题解 | #人民币转换#
人民币转换
http://www.nowcoder.com/practice/00ffd656b9604d1998e966d555005a4b
思路：分整数部分和小数部分分别定义两个函数进行处理，处理完成后去掉多余的零。数字转换很简单，主要是处理单位的转换。大概就这样。Code:
import java.util.*;
public class RMBTransfer {
static String[] unit = {"", "拾", "佰", "仟", "万", "拾", "佰", "仟", "亿", "拾", "佰", "仟"};
static Map<Integer, String> numMap = new HashMap<>();
static {
numMap.put(0, "零");
numMap.put(1, "壹");
numMap.put(2, "贰");
numMap.put(3, "叁");
numMap.put(4, "肆");
numMap.put(5, "伍");
numMap.put(6, "陆");
numMap.put(7, "柒");
numMap.put(8, "捌");
numMap.put(9, "玖");
}
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
while (in.hasNextLine()) {
String nStr = in.nextLine();
String integer = nStr.split("\\.")[0];
String decimal = nStr.split("\\.")[1];
String sbStr = handleInt(integer);
String sb1Str = handleDecimal(decimal);
StringBuffer sb = new StringBuffer();
if (sbStr.equals("人民币零") && !sb1Str.equals("")){
sb.append("人民币").append(sb1Str);
}else{
sb.append(sbStr);
if (sb1Str.equals("")){
sb.append("元整");
}else{
sb.append("元").append(sb1Str);
}
}
System.out.println(sb.toString().replace("零零零", "零").replace("零零", "零").replace("壹拾", "拾").replace("零亿", "亿").replace("零万", "万").replace("零元", "元").replace("元零", "元").replace("角零", "角"));
}
}
private static String handleDecimal(String decimal) {
String[] unit1 = {"角", "分"};
StringBuffer sb = new StringBuffer();
int len = decimal.length();
if (decimal.equals("00")){
return "";
}
for (int i = 0; i < len; i++) {
int v = Integer.parseInt(decimal.charAt(i) + "");
sb.append(numMap.get(v));
if (v != 0){
sb.append(unit1[i]);
}
}
return sb.toString();
}
private static String handleInt(String integer) {
if(integer == "0"){
return "人民币";
}
int len = integer.length();
StringBuffer sb = new StringBuffer("人民币");
for (int i = 0; i < len; i++) {
int v = Integer.parseInt(integer.charAt(i) + "");
sb.append(numMap.get(v));
if (v != 0 || len-i-1 == 4 && v == 0 || len-i-1 == 8 && v == 0){
sb.append(unit[len - i - 1]);
}
}
return sb.toString();
}
}
