说明:
Android涉及到的金额分转元、元转分,写成工具类做记录使用。
代码:
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
package com.baofu.sdkwebpayment; import android.content.Context; import android.widget.Toast; import java.math.BigDecimal; import java.text.SimpleDateFormat; import java.util.Calendar; import java.util.Date; /** * 金额工具类 * Created by zst on 2018/5/7. */ public class AmountUtil { /** * 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(Context context, String amount) { if (!amount.matches(CURRENCY_FEN_REGEX)) { Toast.makeText(context, "金额格式有误", Toast.LENGTH_LONG).show(); } 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(); } }