Java工具类——把金额转换成汉字大写金额

class MoneyFormat{  
	 private final String [] pattern ={"零","壹","贰","叁","肆","伍","陆","柒","捌","玖"};  
	 private final String [] cPattern ={"","拾","佰","仟","万","拾","佰","仟","亿"};  
	 private final String [] cfPattern = {"","角","分"};  
	 private final String ZEOR = "零";  
	 public MoneyFormat(){  
	     System.out.println("run...");  
	    
	 }   
	   
	 public String format(String moneyString){  
	  int dotPoint = moneyString.indexOf("."); //判断是否为小数  
	  String moneyStr;        
	  if(dotPoint != -1){  
	   moneyStr = moneyString.substring(0,moneyString.indexOf("."));  
	  }  
	  else{  
	   moneyStr = moneyString;  
	  }  
	  StringBuffer fraction = null;   //小数部分的处理,以及最后的yuan.  
	  StringBuffer ms = new StringBuffer();   
	  for(int i = 0;i < moneyStr.length();i++){  
	   ms.append(pattern[moneyStr.charAt(i) - 48]); //按数组的编号加入对应大写汉字  
	  }  
	    
	  int cpCursor = 1;  
	  for(int j = moneyStr.length() - 1;j > 0;j--){  
	   ms.insert(j,cPattern[cpCursor]);   //在j之后加字符,不影响j对原字符串的相对位置  
	              //只是moneyStr.length()不断增加  
	              //insert(j,"string")就在j位置处插入,j=0时为第一位  
	   cpCursor = cpCursor == 8?1:cpCursor + 1;    //亿位之后重新循环  
	  }  
	    
	    
	  while(ms.indexOf("零拾") != -1){  //当十位为零时用一个"零"代替"零拾"  
	            //replace的起始于终止位置  
	   ms.replace(ms.indexOf("零拾"),ms.indexOf("零拾") + 2,ZEOR);  
	  }  
	  while(ms.indexOf("零佰") != -1){  //当百位为零时,同理  
	   ms.replace(ms.indexOf("零佰"),ms.indexOf("零佰") + 2,ZEOR);  
	  }  
	  while(ms.indexOf("零仟") != -1){  //同理  
	   ms.replace(ms.indexOf("零仟"),ms.indexOf("零仟") + 2,ZEOR);  
	  }  
	  while(ms.indexOf("零万") != -1){  //万需保留，中文习惯  
	   ms.replace(ms.indexOf("零万"),ms.indexOf("零万") + 2,"万");  
	  }  
	  while(ms.indexOf("零亿") != -1){  //同上  
	   ms.replace(ms.indexOf("零亿"),ms.indexOf("零亿") + 2,"亿");  
	  }  
	  while(ms.indexOf("零零") != -1){//有连续数位出现零，即有以下情况，此时根据习惯保留一个零即可  
	   ms.replace(ms.indexOf("零零"),ms.indexOf("零零") + 2,ZEOR);  
	  }  
	  while(ms.indexOf("亿万") != -1){  //特殊情况，如:100000000,根据习惯保留高位  
	   ms.replace(ms.indexOf("亿万"),ms.indexOf("亿万") + 2,"亿");  
	  }  
	  while(ms.lastIndexOf("零") == ms.length()-1){  //当结尾为零j，不必显示,经过处理也只可能出现一个零  
		  if(ms.indexOf("零") == -1){
			  ms.delete(ms.lastIndexOf("零"),ms.lastIndexOf("零") + 1);  
		  }else{
			  break;
		  }
	  }  
	    
	    
	  int end;  
	  if((dotPoint = moneyString.indexOf(".")) != -1 ){ //是小数的进入   
	   String fs = moneyString.substring(dotPoint + 1,moneyString.length());  
	   if(fs.indexOf("00") == -1 || fs.indexOf("00") >= 2){//若前两位小数全为零，则跳过操作  
	    end = fs.length() > 2?2:fs.length();  //仅保留两位小数  
	    fraction = new StringBuffer(fs.substring(0,end));  
	    for(int j = 0;j < fraction.length();j++){  
	     fraction.replace(j,j+1,this.pattern[fraction.charAt(j) - 48]); //替换大写汉字  
	    }  
	    for(int i = fraction.length();i > 0;i--){  //插入中文标识  
	     fraction.insert(i,cfPattern[i]);  
	    }  
	    fraction.insert(0,"元");      //为整数部分添加标识  
	   }  
	   else{  
	    fraction = new StringBuffer("元整");   
	   }  
	     
	  }  
	  else{  
	   fraction = new StringBuffer("元整");  
	  }  
	     
	  ms.append(fraction);         //加入小数部分  
	  return ms.toString();  
	 }  
	   
	   
	   
	   
	 public static void main(String [] ar){  
	  System.out.println(new MoneyFormat().format("10005022.123009"));  
	  System.out.println(new MoneyFormat().format("0.12"));  
	 }  
	}   

转自【http://www.open-open.com/lib/view/open1400206687504.html】