Java 判断是否合法ip

private boolean checkIP(String str) { Pattern pattern = Pattern .compile("^((\\d|[1-9]\\d|1\\d\\d|2[0-4]\\d|25[0-5]" + "|[*])\\.){3}(\\d|[1-9]\\d|1\\d\\d|2[0-4]\\d|2

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