Java 代码将 MAC 地址 8089174498B4 格式化为 80:89:17:44:98:B4
String macAddress = '8089174498B4';
String formattedMacAddress = macAddress.replaceAll('(?<=\G..)(?!$)', ':');
System.out.println(formattedMacAddress);
输出结果为：80:89:17:44:98:B4
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