sbc12345 前面固定3位字母，后面固定5个数字
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^[a-zA-Z]{3}[0-9]{5}$
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- Java code
String rule = "[a-zA-Z]{3}[0-9]{5}"; Pattern p = Pattern.compile(rule); Matcher m = p.matcher("abc12345"); boolean b = m.matches(); if (b) { System.out.println("YES"); } else { System.out.println("NO"); }