java 实现金额大小写转换

把数字字符串转换为中文大写的字符串

privatestaticString integerTransGBK(String input) {
String regix = "[0-9]+";
int[] num = newint[input.length()];
String[] str1 = { "零","壹","贰","叁","肆","伍","陆","柒","玐","玖"};
TreeMap<Integer, String> map1 = newTreeMap<Integer, String>();
StringBuilder sb = newStringBuilder();
intlen = num.length;       //数字的长度
booleanhasZero = false;   //是否有0
//是否从第1位，第5为，第9位……开始。用来去除个位上的“零”
booleanzeroFromGeWei = true;

//判断是否是合法数字
if(!input.matches(regix)){
thrownewRuntimeException("对不起，你输入的不是数字!");
}

// 将String数字变成int数组
for(inti = 0; i < num.length; i++) {
num[i] = Integer.parseInt(String.valueOf(input.charAt(i)));
}

// 将str1的元素与数字一一对应
for(inti = 0; i < str1.length; i++) {
map1.put(i, str1[i]);
}

//开始转换字符串
for(inti = len - 1; i>= 0; i--){
intposition = len - i -1;
if( position % 4==0)
zeroFromGeWei = true;

// 如果不是个位，每四位加个万或亿字，交替添加
if(i != (len - 1) && ( position % 4==0)){
if(hasZero ) {
sb.insert(0,"零");  //在万亿之前的0数字，要处理完
hasZero = false;
}
if((position % 8==0)){
sb.insert(0,"亿");
}else{
sb.insert(0,"万");
}
}
//判断数字字符是不是0字符
if(num[i] != 0){
if(hasZero && !zeroFromGeWei ) {
sb.insert(0,"零");
}
hasZero = false;
zeroFromGeWei = false;
sb.insert(0,map1.get(num[i]));

switch(position % 4) {
case1:
sb.insert(1,"拾");
break;
case2:
sb.insert(1,"百");
break;
case3:
sb.insert(1,"千");
break;
default:
break;
}
}else{
hasZero = true;
}
}
//去除零万的情况
intindex = sb.indexOf("零万");
while(index != -1){
sb.delete(index, index+2);
index = sb.indexOf("零万");
}
//去除零亿的情况
index = sb.indexOf("零亿");
while(index != -1){
sb.delete(index, index+1);
index = sb.indexOf("零亿");
}
//去除最后一个字符为0的情况,在低8位为0的情况下，会在亿字后多个零字
index = sb.indexOf("零",sb.length()-1);
if(index != -1){
sb.delete(index, index +1);
}
returnsb.toString();
}