java元转分以及分转元

	/**
	 * 将元为单位的数额转换为分
	 * @param amount
	 * @return
	 */
	 public static String yuanToFee(String amount){    
	        String currency =  amount.replaceAll("\\$|\\￥|\\,", "");  //处理包含, ￥ 或者$的金额    
	        int index = currency.indexOf(".");    
	        int length = currency.length();    
	        Long amLong = 0l;    
	        if(index == -1){    
	            amLong = Long.valueOf(currency+"00");    
	        }else if(length - index >= 3){    
	            amLong = Long.valueOf((currency.substring(0, index+3)).replace(".", ""));    
	        }else if(length - index == 2){    
	            amLong = Long.valueOf((currency.substring(0, index+2)).replace(".", "")+0);    
	        }else{    
	            amLong = Long.valueOf((currency.substring(0, index+1)).replace(".", "")+"00");    
	        }    
	        return amLong.toString();    
	  }

	 /**
	  * 将分为单位的数额转换为元
	  * @param amount
	  * @return
	  */
	 public String feeToYuan(Long amount){
		 try {
			 if(!amount.toString().matches("\\-?[0-9]+"));
		 }catch (Exception e) {
			 e.printStackTrace();
		 }
		 int flag = 0;
		 String amString = amount.toString();    
         if(amString.charAt(0)=='-'){
        	 flag = 1;    
             amString = amString.substring(1);    
         }    
         StringBuffer result = new StringBuffer();    
         if(amString.length()==1){    
             result.append("0.0").append(amString);    
         }else if(amString.length() == 2){    
             result.append("0.").append(amString);    
         }else{    
	             String intString = amString.substring(0,amString.length()-2);    
	             for(int i=1; i<=intString.length();i++){
	                 if( (i-1)%3 == 0 && i !=1){    
	                     result.append(",");    
	                 }    
	                 result.append(intString.substring(intString.length()-i,intString.length()-i+1));    
	             }    
	             result.reverse().append(".").append(amString.substring(amString.length()-2));    
	      }    
	      if(flag == 1){
	    	  return "-"+result.toString();    
	      }else{    
	          return result.toString();    
	      }    
	 }