scala Scala在字符串中查找字符串的位置
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Scala find location of string in a string
提问by user1491739
I have this string:
我有这个字符串：
var htmlString;
Assigned to:
分配给：
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<html>
<head>
<title>Payment Receipt</title>
<link rel="stylesheet" type="text/css" href="content/PaymentForm.css">
<style type="text/css">
</style>
<meta content='text/html; charset=UTF-8' http-equiv='Content-Type'/>
</head>
<body>
<div id="divPageOuter" class="PageOuter">
<div id="divPage" class="Page">
<!--[1]-->
<div id="divThankYou">
Thank you for your order!
</div>
<hr class="HrTop">
<div id="divReceiptMsg">
You may print this receipt page for your records.
</div>
<div class="SectionBar">
Order Information
</div>
<table id="tablePaymentDetails1Rcpt">
<tr>
<td class="LabelColInfo1R">
Merchant:
</td>
<td class="DataColInfo1R">
<!--Merchant.val-->
Ryan
<!--end-->
</td>
</tr>
<tr>
<td class="LabelColInfo1R">
Description:
</td>
<td class="DataColInfo1R">
<!--x_description.val-->
Rasmussenpayment
<!--end-->
</td>
</tr>
</table>
<table id="tablePaymentDetails2Rcpt" cellspacing="0" cellpadding="0">
<tr>
<td id="tdPaymentDetails2Rcpt1">
<table>
<tr>
<td class="LabelColInfo1R">
Date/Time:
</td>
<td class="DataColInfo1R">
<!--Date/Time.val-->
09-Jul-2012 12:26:46 PM PT
<!--end-->
</td>
</tr>
<tr>
<td class="LabelColInfo1R">
Customer ID:
</td>
<td class="DataColInfo1R">
<!--x_cust_id.val-->
<!--end-->
</td>
</tr>
</table>
</td>
<td id="tdPaymentDetails2Rcpt2">
<table>
<tr>
<td class="LabelColInfo1R">
Invoice Number:
</td>
<td class="DataColInfo1R">
<!--x_invoice_num.val-->
176966244
<!--end-->
</td>
</tr>
</table>
</td>
</tr>
</table>
<hr id="hrBillingShippingBefore">
<table id="tableBillingShipping">
<tr>
<td id="tdBillingInformation">
<div class="Label">
Billing Information
</div>
<div id="divBillingInformation">
Test14 Rasmussen<br>
1234 test st<br>
San Diego, CA 92107 <br>
</div>
</td>
<td id="tdShippingInformation">
<div class="Label">
Shipping Information
</div>
<div id="divShippingInformation">
</div>
</td>
</tr>
</table>
<hr id="hrBillingShippingAfter">
<div id="divOrderDetailsBottomR">
<table id="tableOrderDetailsBottom">
<tr>
<td class="LabelColTotal">
Total:
</td>
<td class="DescrColTotal">
</td>
<td class="DataColTotal">
<!--x_amount.val-->
US 0.00
<!--end-->
</td>
</tr>
</table>
<!-- tableOrderDetailsBottom -->
</div>
<div id="divOrderDetailsBottomSpacerR">
</div>
<div class="SectionBar">
Visa ****0027
</div>
<table class="PaymentSectionTable" cellspacing="0" cellpadding="0">
<tr>
<td class="PaymentSection1">
<table>
<tr>
<td class="LabelColInfo2R">
Date/Time:
</td>
<td class="DataColInfo2R">
<!--Date/Time.1.val-->
09-Jul-2012 12:26:46 PM PT
<!--end-->
</td>
</tr>
<tr>
<td class="LabelColInfo2R">
Transaction ID:
</td>
<td class="DataColInfo2R">
<!--Transaction ID.1.val-->
2173493354
<!--end-->
</td>
</tr>
<tr>
<td class="LabelColInfo2R">
Authorization Code:
</td>
<td class="DataColInfo2R">
<!--x_auth_code.1.val-->
07I3DH
<!--end-->
</td>
</tr>
<tr>
<td class="LabelColInfo2R">
Payment Method:
</td>
<td class="DataColInfo2R">
<!--x_method.1.val-->
Visa ****0027
<!--end-->
</td>
</tr>
</table>
</td>
<td class="PaymentSection2">
<table>
</table>
</td>
</tr>
</table>
<div class="PaymentSectionSpacer">
</div>
</div>
<!-- entire BODY -->
</div>
<div class="PageAfter">
</div>
</body>
</html>
And I want to find the location of "x_auth_code.1.val"in the string. And then I want to obtain a string from the location plus a certain number of characters. The goal would be to return the Authorization code.
我想找到"x_auth_code.1.val"字符串中的位置。然后我想从该位置获取一个字符串加上一定数量的字符。目标是返回授权代码。
回答by Christopher Chiche
You can use indexOfSlice, and then slice()in StringOps
您可以使用indexOfSlice, 然后slice()在StringOps 中
scala> val myString = "Hello World!"
myString: java.lang.String = Hello World!
scala> val index = myString.indexOfSlice("Wo")
index: Int = 6
scala> val slice = myString.slice(index, index+5)
slice: String = World
With your html string:
使用您的 html 字符串：
scala> htmlString.indexOfSlice("x_auth_code.1.val")
res4: Int = 2771
回答by Daniel C. Sobral
Why aren't you using an XML parser? Don't treat XML as strings -- you'll get bitten if you do.
为什么不使用 XML 解析器？不要将 XML 视为字符串 —— 如果你这样做，你会被咬的。
Here's a regex to do it, but my advice is: DO NOT USE IT! Use xml tools.
这是一个正则表达式，但我的建议是：不要使用它！使用 xml 工具。
"""\Qx_auth_code.1.val\E[^>]*>([^<]*)""".r.findFirstMatchIn(htmlString).map(_ group 1)
