<HTML>
<HEAD>
<TITLE>Regular Expression Test Page</TITLE>
<!--- Some styles to make the page look nice --->
<STYLE>
BODY {font-family:arial;font-size:12px}
INPUT {font-size:11px}
TEXTAREA {font-size:11px}
TH {background:#8888FF;color:white;text-align:left}
TD {background:#CCCC99;color:black;font-size:12px}
TD.RowA {background:#CCCC99}
TD.RowB {background:#EEEEBB}
.header {font-weight:bold}
</STYLE>
<SCRIPT LANGUAGE="JavaScript">
// Turn off fields used only by replace
function hideReplaceFields() {
document.getElementById('RegExReplace').disabled=true;
document.getElementById('replaceheader').disabled=true;
}
// Turn on fields used only by replace
function showReplaceFields() {
document.getElementById('RegExReplace').disabled=false;
document.getElementById('replaceheader').disabled=false;
}
// Perform a find
function processRegexFind(text,regex,flags) {
var reg = new RegExp(regex,flags);
var lastIdx = -1;
var iCount = 0;
var result = "";
var output = '<DIV STYLE="height:200px;overflow-y:auto;width:550">' +
'<TABLE BORDER="0" CELLPADDING="2" CELLSPACING="0" WIDTH="550">' +
'<TR><TH WIDTH="*">Match</TH><TH WIDTH="50">Position</TH><TH WIDTH="50">Length</TH></TR>';
// Loop as long as have matches
while (lastIdx != 0)
{
// Do it
var mtch = reg.exec(text);
// Check if got one
if (reg.lastIndex != 0)
{
// Yep,increment counter
iCount++;
if (iCount % 2)
style = "RowA";
else
style = "RowB";
// Write output
output += '<TR CLASS="' + style + '"><TD>' +
RegExp.lastMatch + "</TD><TD>" +
(reg.lastIndex-RegExp.lastMatch.length) + "</TD><TD>" +
RegExp.lastMatch.length + "</TD></TR>";
}
lastIdx = reg.lastIndex;
}
output += "</TABLE>";
// Build result
if (iCount != 0)
result = "Matches Found: " + iCount+ "<BR>" + output;
else
result = "No matches";
return result;
}
// Process a replace
function processRegexReplace(text,regexfind,regexreplace,flags) {
// Define regex
var re = new RegExp (regexfind,flags) ;
// Do it
var newstr = text.replace(re,regexreplace) ;
// Generate output
var result = '<DIV STYLE="height:200px;overflow-y:auto;width:550">' +
'<TABLE BORDER="0" CELLPADDING="2" CELLSPACING="0" WIDTH="550">' +
'<TR><TH>New Text</TH></TR><TR><TD>' +
newstr + '</TD></TR>';
return result;
}
// Process entry point
function processRegex(form) {
var output="";
var flags;
if (form.CaseSensitive.checked)
flags = "g";
else
flags = "gi";
// What to do?
if (form.OperationFind.checked) {
output=processRegexFind(form.SearchText.value,form.RegEx.value,flags);
}
else if (form.OperationReplace.checked) {
output=processRegexReplace(form.SearchText.value,form.RegExReplace.value,flags);
}
document.getElementById('output').innerHTML=output;
return false;
}
</SCRIPT>
</HEAD>
<BODY>
<FORM NAME="tester" ACTION="" METHOD="post" onSubmit="processRegex(this);return false">
<TABLE BORDER="1" CELLPADDING="4" CELLSPACING="0" WIDTH="550">
<TR>
<TH CLASS="Dialog">Regular Expression Tester</TH>
</TR>
<TR>
<TD CLASS="Dialog">
<!--- Text input for the regular expression itself --->
<SPAN CLASS="header">Enter a regular expression:</SPAN><BR>
<INPUT NAME="RegEx" TYPE="Text" SIZE="65" STYLE="font-size:13px">
<!--- CheckBox to control case-sensitivity --->
<INPUT TYPE="CheckBox" NAME="CaseSensitive" ID="CaseSensitive" VALUE="Yes">
<LABEL FOR="CaseSensitive">Case sensitive</LABEL>
<BR>
<!--- Radio buttons to display find vs. replace --->
<INPUT TYPE="Radio" NAME="Operation" ID="OperationFind" VALUE="find" CHECKED onClick="hideReplaceFields()">
<LABEL FOR="OperationFind">Find</LABEL>
<INPUT TYPE="Radio" NAME="Operation" ID="OperationReplace" VALUE="replace" onClick="showReplaceFields()">
<LABEL FOR="OperationReplace">Replace</LABEL>
<BR>
<!--- Text input for the replace regular expression --->
<SPAN CLASS="header" ID="replaceheader">Enter the replace regular expression:</SPAN><BR>
<INPUT ID="RegExReplace" NAME="RegExReplace" TYPE="Text" SIZE="65" STYLE="font-size:13px">
<BR><BR>
<!--- Textarea where user can type the text to search --->
<SPAN CLASS="header">And the text you wish to search:</SPAN><BR>
<TEXTAREA NAME="SearchText" WRAP="off" COLS="70" ROWS="6"></TEXTAREA>
<BR>
<!--- Submit button to start the search --->
<INPUT NAME="Submit" TYPE="Submit" STYLE="font-weight:bold" VALUE="Match Now"></TD>
</TR>
</TABLE>
</FORM>
<!-- Display any reults here --->
<SPAN id="output"></SPAN>
<!-- Default to find --->
<SCRIPT LANGUAGE="JavaScript">
hideReplaceFields();
</SCRIPT>
</BODY>
</HTML>
新建文本文档，把上面代码拷贝进去，然后更改后缀名为.html（此工具引用了www.forta.com）
原文链接：https://www.f2er.com/regex/361220.html