金额元分之间转换工具类

package com.ucf.gateway.bankgw.bank.cmbc.Utils;

import java.math.BigDecimal;

/**
* com.util.AmountUtils
*
* @description 金额元分之间转换工具类
* @author zcm0708@sina.com
* @2012-2-7下午12:58:00
*/
public class AmountUtils {

/** 金额为分的格式 */
public static final String CURRENCY_FEN_REGEX = "\\-?[0-9]+";

/**
* 将分为单位的转换为元并返回金额格式的字符串 （除100）
*
* @param amount
* @return
* @throws Exception
*/
public static String changeF2Y(Long amount) throws Exception {
if (!amount.toString().matches(CURRENCY_FEN_REGEX)) {
throw new Exception("金额格式有误");
}

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();
}
}

/**
* 将分为单位的转换为元 （除100）
*
* @param amount
* @return
* @throws Exception
*/
public static String changeF2Y(String amount) throws Exception {
if (!amount.matches(CURRENCY_FEN_REGEX)) {
throw new Exception("金额格式有误");
}
return BigDecimal.valueOf(Long.valueOf(amount))
.divide(new BigDecimal(100)).toString();
}

/**
* 将元为单位的转换为分 （乘100）
*
* @param amount
* @return
*/
public static String changeY2F(Long amount) {
return BigDecimal.valueOf(amount).multiply(new BigDecimal(100))
.toString();
}

/**
* 将元为单位的转换为分 替换小数点，支持以逗号区分的金额
*
* @param amount
* @return
*/
public static String changeY2F(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();
}

// public static void main(String[] args) {
// // try {
// // System.out.println("结果："+changeF2Y("-000a00"));
// // } catch(Exception e){
// // System.out.println("----------->>>"+e.getMessage());
// // // return e.getErrorCode();
// // }
// // System.out.println("结果："+changeY2F("1.00000000001E10"));
//
// System.out.println(AmountUtils.changeY2F("0.01"));
// try {
// System.out.println(AmountUtils.changeF2Y("1322"));
// } catch (Exception e) {
// e.printStackTrace();
// }
// // System.out.println(Long.parseLong(AmountUtils.changeY2F("1000000000000000")));
// // System.out.println(Integer.parseInt(AmountUtils.changeY2F("10000000")));
// // System.out.println(Integer.MIN_VALUE);
// // long a = 0;
// // System.out.println(a);
//
// }
}