java金额元与分转换工具类

java金额元与分转换的一个工具类。

1.元转分：

可传入字符串或者long型(隐式转换为long型也可)整数。

若传入为字符串，则通过替换小数点的方式转换，小数点有多位或者没有小数点皆已考虑。

若传入为long 则通过BigDecimal来乘100

2.分转元：

可传入字符串或者long型(隐式转换为long型也可)整数。并对传入的分进行粗略的格式判断

详见代码：

package com.util;

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("1000000000000000"));

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);

}

}