以前写的人民币大小写转换的 import java.util.*; public class RmbConvert { public void convertToCapital(double money){ String[] capitalRmb=new String[14]; for(int i=0;i<capitalRmb.length;i++){ int j=(int)((money*100)%10); money/=10; switch(j){ case 0: capitalRmb[i]="零";break; case 1:capitalRmb[i]="壹";break; case 2:capitalRmb[i]="贰";break; case 3:capitalRmb[i]="叁";break; case 4:capitalRmb[i]="肆";break; case 5:capitalRmb[i]="伍";break; case 6:capitalRmb[i]="陆";break; case 7:capitalRmb[i]="柒";break; case 8:capitalRmb[i]="捌";break; case 9:capitalRmb[i]="玖";break; } } String[] str=new String[]{ "仟","百","拾","亿 ","仟","百","拾","万 ","仟","百","拾","元 ","角","分" }; int init=0; while(capitalRmb[capitalRmb.length-1-init]=="零"){ init++; } for(int i=init;i<str.length;i++){ if(capitalRmb[capitalRmb.length-1-i]=="零"&&str[i]!="角"&&str[i]!="分"){ System.out.print(capitalRmb[capitalRmb.length-1-i]); }else System.out.print(capitalRmb[capitalRmb.length-1-i]+str[i]); } } public void convertToLower(String money){ char[] c=money.toCharArray(); double[] num=new double[c.length/2]; int j=0; for(int i=0;i<c.length;i+=2){ double d=num.length-3-j; switch(c[i]){ case '零':num[j++]=(0*Math.pow(10.0,d));break; case '壹':num[j++]=(1*Math.pow(10.0,d));break; case '贰':num[j++]=(2*Math.pow(10.0,d));break; case '叁':num[j++]=(3*Math.pow(10.0,d));break; case '肆':num[j++]=(4*Math.pow(10.0,d));break; case '伍':num[j++]=(5*Math.pow(10.0,d));break; case '陆':num[j++]=(6*Math.pow(10.0,d));break; case '柒':num[j++]=(7*Math.pow(10.0,d));break; case '捌':num[j++]=(8*Math.pow(10.0,d));break; case '玖':num[j++]=(9*Math.pow(10.0,d));break; }
} double init=0; for(int i=0;i<num.length;i++){ init+=num[i]; } System.out.print(init); } public static void main(String[] args) { System.out.println("please enter the lower momey"); RmbConvert rmb=new RmbConvert(); Scanner sca=new Scanner(System.in); Double money=sca.nextDouble(); System.out.println("convert to Capital"); rmb.convertToCapital(money); System.out.println(); System.out.println("convert to lower"); Scanner sc=new Scanner(System.in); String str=sc.next(); rmb.convertToLower(str); }} 测试结果:please enter the lower momey 123456789 convert to Capital 壹亿 贰仟叁百肆拾伍万 陆仟柒百捌拾玖元 零角零分 convert to lower 壹亿贰仟叁百肆拾伍万陆仟柒百捌拾玖元零角零分 1.23456789E8
public class TestBigChar {
public static char[] characters = {'零','一','二','三','四','五','六','七','八','九'}; public static char[] units = {'点','十','百','千'};
public static void main(String[] args) { System.out.println(convert(123.04)); } public static String convert(double d){ String val = d+""; String convert = ""; int index = val.indexOf('.'); for(int i=0;i<val.length();i++){ convert += i==index?units[0]:characters[Integer.parseInt(val.substring(i,i+1))]; if(i<index) convert += units[index-i]; } return convert; }
2. str.split(".");//截取 整数部分与小数部分
str.length();/根据数组长度判断有没小树部分 然后分开处理
3. 接着把整数部分 s.length()判断一下有多长超过三位数的截取出来
套一个循环 万 十万 百万........等等等等。 三位以内的也就是 下标为s.length()-3,-2,-1,分别为 千,百,十。
数字部分可以套一个 switch( Integer.paseInt(s.charAt(index) ) ){
case 0: xxx = "零";break;
case 1; xxx = "壹";break;
..
..
..
} 核心思想就在上面了! 用字符串处理比较灵活。
import java.util.*;
public class RmbConvert {
public void convertToCapital(double money){
String[] capitalRmb=new String[14];
for(int i=0;i<capitalRmb.length;i++){
int j=(int)((money*100)%10);
money/=10;
switch(j){
case 0: capitalRmb[i]="零";break;
case 1:capitalRmb[i]="壹";break;
case 2:capitalRmb[i]="贰";break;
case 3:capitalRmb[i]="叁";break;
case 4:capitalRmb[i]="肆";break;
case 5:capitalRmb[i]="伍";break;
case 6:capitalRmb[i]="陆";break;
case 7:capitalRmb[i]="柒";break;
case 8:capitalRmb[i]="捌";break;
case 9:capitalRmb[i]="玖";break;
}
}
String[] str=new String[]{
"仟","百","拾","亿 ","仟","百","拾","万 ","仟","百","拾","元 ","角","分"
};
int init=0;
while(capitalRmb[capitalRmb.length-1-init]=="零"){
init++;
}
for(int i=init;i<str.length;i++){
if(capitalRmb[capitalRmb.length-1-i]=="零"&&str[i]!="角"&&str[i]!="分"){
System.out.print(capitalRmb[capitalRmb.length-1-i]);
}else
System.out.print(capitalRmb[capitalRmb.length-1-i]+str[i]);
}
}
public void convertToLower(String money){
char[] c=money.toCharArray();
double[] num=new double[c.length/2];
int j=0;
for(int i=0;i<c.length;i+=2){
double d=num.length-3-j;
switch(c[i]){
case '零':num[j++]=(0*Math.pow(10.0,d));break;
case '壹':num[j++]=(1*Math.pow(10.0,d));break;
case '贰':num[j++]=(2*Math.pow(10.0,d));break;
case '叁':num[j++]=(3*Math.pow(10.0,d));break;
case '肆':num[j++]=(4*Math.pow(10.0,d));break;
case '伍':num[j++]=(5*Math.pow(10.0,d));break;
case '陆':num[j++]=(6*Math.pow(10.0,d));break;
case '柒':num[j++]=(7*Math.pow(10.0,d));break;
case '捌':num[j++]=(8*Math.pow(10.0,d));break;
case '玖':num[j++]=(9*Math.pow(10.0,d));break;
}
}
double init=0;
for(int i=0;i<num.length;i++){
init+=num[i];
}
System.out.print(init);
}
public static void main(String[] args) {
System.out.println("please enter the lower momey");
RmbConvert rmb=new RmbConvert();
Scanner sca=new Scanner(System.in);
Double money=sca.nextDouble();
System.out.println("convert to Capital");
rmb.convertToCapital(money);
System.out.println();
System.out.println("convert to lower");
Scanner sc=new Scanner(System.in);
String str=sc.next();
rmb.convertToLower(str);
}}
测试结果:please enter the lower momey
123456789
convert to Capital
壹亿 贰仟叁百肆拾伍万 陆仟柒百捌拾玖元 零角零分
convert to lower
壹亿贰仟叁百肆拾伍万陆仟柒百捌拾玖元零角零分
1.23456789E8
public static char[] characters = {'零','一','二','三','四','五','六','七','八','九'};
public static char[] units = {'点','十','百','千'};
public static void main(String[] args) {
System.out.println(convert(123.04));
} public static String convert(double d){
String val = d+"";
String convert = "";
int index = val.indexOf('.');
for(int i=0;i<val.length();i++){
convert += i==index?units[0]:characters[Integer.parseInt(val.substring(i,i+1))];
if(i<index)
convert += units[index-i];
}
return convert;
}
}
本文来自CSDN博客,转载请标明出处:http://blog.csdn.net/lz12366/archive/2009/10/02/4628139.aspx
public class TestNumberToString { public static void main(String[] args) {
String[] digitChinese = { "零", "一", "二", "三", "四", "五", "六", "七", "八",
"九" };
String[] unitChinese = { "点", "十", "百", "千", "万" };
double digit = 1234567.235;
String convert = "";
String digitStr = String.valueOf(digit);
int length = digitStr.length();
int pointIndex = digitStr.indexOf(".");
int position = pointIndex == -1 ? length - 1 : pointIndex-1;
for (int i = 0; i < pointIndex; i++) {
int temp = Integer.parseInt(digitStr.substring(i, i + 1));
convert += position > 4 ? digitChinese[temp]
+ unitChinese[position % 4] : digitChinese[temp]
+ unitChinese[position];
position--;
}
if (pointIndex != -1) {
for (int i = pointIndex+1; i < length; i++) {
convert += digitChinese[Integer.parseInt(digitStr.substring(i,i+1))];
}
}
System.out.println(convert);
}}