您好,我遭到拒绝服务:下一行定期表达警告
billingApplicationAcctId = billingApplicationAcctId.replaceAll(“ \” + s,“”);
您可以看到下面的代码以供进一步参考
if (null != formatBillingAcctIdInd && formatBillingAcctIdInd.equals("Y")
&& billingApplicationCode.equalsIgnoreCase(EPWFReferenceDataConstants.BILLING_APPICATION_ID.KENAN.name())) {
Pattern pt = Pattern.compile("[^a-zA-Z0-9]");
Matcher match = pt.matcher(payment.getBillingApplicationAccntId());
while (match.find()) {
String s = match.group();
billingApplicationAcctId = billingApplicationAcctId.replaceAll("\\" + s, "");
}
}
我应该怎么做而不是上面的代码,所以我不会得到强化的DOS警告
如果您不想使用正则表达式代码,则可以按字符对输入进行比较。只需替换
Pattern pt = Pattern.compile("[^a-zA-Z0-9]");
Matcher match = pt.matcher(payment.getBillingApplicationAccntId());
while (match.find()) {
String s = match.group();
billingApplicationAcctId = billingApplicationAcctId.replaceAll("\\" + s, "");
}
with:
String rawInput = payment.getBillingApplicationAccntId();
StringBuilder sb = new StringBuilder();
for (char c : rawInput.toCharArray()) {
if ((c >= 'a' && c <= 'z')
|| (c >= 'A' && c <= 'A')
|| (c >= '0' && c <= '9')) {
sb.append(c);
}
}
billingApplicationAcctId = sb.toString();