字符串金额千分符格式化

一、代码

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public class UnitTest {     // 金额字符串格式化为千分符     public static String fmtMicrometer(String amount) {         DecimalFormat df = null;         if (amount.indexOf(".") > 0) {             if (amount.length() - amount.indexOf(".") - 1 == 0) {                 df = new DecimalFormat("###,##0.");             } else if (amount.length() - amount.indexOf(".") - 1 == 1) {                 df = new DecimalFormat("###,##0.0");             } else {                 df = new DecimalFormat("###,##0.00");             }         } else {             df = new DecimalFormat("###,##0");         }         double number = 0.0;         try {             number = Double.parseDouble(amount);         } catch (Exception e) {             number = 0.0;         }         return df.format(number);     }       public static String amountByYuan(Long amountByFen){         // 将 分 转换为 元         // 2f 保留两位小数  同理 3f 代表保留三位小数         String amountByYuan = String.format("%.3f", amountByFen.doubleValue() / 100);         // 将金额转换为 千分符 格式         String result = fmtMicrometer(amountByYuan);         return result;     }       // 测试     public static void main(String[] args) {         Long amount = 99822124l;         System.out.println(amountByYuan(amount));     } }

　　

二、测试结果