87,993
社区成员
发帖
与我相关
我的任务
分享正则表达式不能这样用吗！问什么我不能将ip分析出来！！！
<html>
<head>
<script language="JavaScript">
<!-- Hide
/*
*/
function validIp(ipstr)
{
//var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/;
var IpPat=new RegExp("^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$");
var IPArray=ipstr.match(IpPat);
alert(IPArray);
if(ipstr != 1)
{
if (IPArray!=null)
{
// this is an IP address
alert(" IP address is invalid!");
for (var i=1;i<=4;i++)
{
if (IPArray[i]>255)
{
alert(" IP address is invalid!");
return false;
}
}
}
}
else
alert(emailStr);
}
// -->
</script>
</head>
<body>
<form name=emailform onSubmit="return validIp(this.ipaddr.value)">
Your Email Address: <input type=text name="ipaddr"><br>
<input type=submit value="Submit">
</form>
<head>
<script language="JavaScript">
<!-- Hide
/*
*/
function validIp(ipstr)
{
//var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/;
var IpPat=new RegExp("^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$");
var IPArray=ipstr.match(IpPat);
alert(IPArray);
if(ipstr != 1)
{
if (IPArray!=null)
{
// this is an IP address
alert(" IP address is invalid!");
for (var i=1;i<=4;i++)
{
if (IPArray[i]>255)
{
alert(" IP address is invalid!");
return false;
}
}
}
}
else
alert(emailStr);
}
// -->
</script>
</head>
<body>
<form name=emailform onSubmit="return validIp(this.ipaddr.value)">
Your Email Address: <input type=text name="ipaddr"><br>
<input type=submit value="Submit">
</form>
...全文
请发表友善的回复…
发表回复
hudson 2002-05-27
- 打赏
- 举报
谢谢，你天天来上网吗！能告诉你的mail地址吗，和你交流交流吗！
我以前在windows 下开发，现在跑道unix下面很多东西不懂。这就是我在写脚本时遇到的问题。
我以前在windows 下开发，现在跑道unix下面很多东西不懂。这就是我在写脚本时遇到的问题。
qiushuiwuhen 2002-05-27
- 打赏
- 举报
\.
=>
\\.
=>
\\.
hudson 2002-05-27
- 打赏
- 举报
噢！还有一个问题，我输入如果是192,1,1,1什么也是对的，及中间的 . 为
，或者；改表达式都认为是对的。这问题又解决的办法吗？
，或者；改表达式都认为是对的。这问题又解决的办法吗？
qiushuiwuhen 2002-05-26
- 打赏
- 举报
\d
=>
[0-9]
或者
\\d
因为在引号中\是转义符，所以需要\\表示\,如下
<html>
<head>
<script language="JavaScript">
<!-- Hide
/*
*/
function validIp(ipstr)
{
//var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/;
var IpPat=new RegExp("^(\\d{1,3})\.(\\d{1,3})\.(\\d{1,3})\.(\\d{1,3})$");
var IPArray=ipstr.match(IpPat);
if (IPArray!=null)
{
// this is an IP address
for (var i=1;i<=4;i++)
{
if (IPArray[i]>255)
{
alert(" IP address is invalid!");
return false;
}
}
}else{
alert("IP address is invalid2!");
return false;
}
}
// -->
</script>
</head>
<body>
<form name=emailform onSubmit="return validIp(this.ipaddr.value);">
Your IP Address: <input type=text name="ipaddr"><br>
<input type=submit value="Submit">
</form>
=>
[0-9]
或者
\\d
因为在引号中\是转义符，所以需要\\表示\,如下
<html>
<head>
<script language="JavaScript">
<!-- Hide
/*
*/
function validIp(ipstr)
{
//var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/;
var IpPat=new RegExp("^(\\d{1,3})\.(\\d{1,3})\.(\\d{1,3})\.(\\d{1,3})$");
var IPArray=ipstr.match(IpPat);
if (IPArray!=null)
{
// this is an IP address
for (var i=1;i<=4;i++)
{
if (IPArray[i]>255)
{
alert(" IP address is invalid!");
return false;
}
}
}else{
alert("IP address is invalid2!");
return false;
}
}
// -->
</script>
</head>
<body>
<form name=emailform onSubmit="return validIp(this.ipaddr.value);">
Your IP Address: <input type=text name="ipaddr"><br>
<input type=submit value="Submit">
</form>
hudson 2002-05-25
- 打赏
- 举报
qiushuiwuhen，非常感谢你给我回答问题，要不然我今天都没法解决这个问题。能告诉我我的表达式错什么的方吗！为什么不能匹配。
qiushuiwuhen 2002-05-25
- 打赏
- 举报
<html>
<head>
<script language="JavaScript">
<!-- Hide
/*
*/
function validIp(ipstr)
{
//var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/;
var IpPat=new RegExp("^([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})$");
var IPArray=ipstr.match(IpPat);
if (IPArray!=null)
{
// this is an IP address
for (var i=1;i<=4;i++)
{
if (IPArray[i]>255)
{
alert(" IP address is invalid!");
return false;
}
}
}else{
alert("IP address is invalid2!");
return false;
}
}
// -->
</script>
</head>
<body>
<form name=emailform onSubmit="return validIp(this.ipaddr.value);">
Your IP Address: <input type=text name="ipaddr"><br>
<input type=submit value="Submit">
</form>
<head>
<script language="JavaScript">
<!-- Hide
/*
*/
function validIp(ipstr)
{
//var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/;
var IpPat=new RegExp("^([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})$");
var IPArray=ipstr.match(IpPat);
if (IPArray!=null)
{
// this is an IP address
for (var i=1;i<=4;i++)
{
if (IPArray[i]>255)
{
alert(" IP address is invalid!");
return false;
}
}
}else{
alert("IP address is invalid2!");
return false;
}
}
// -->
</script>
</head>
<body>
<form name=emailform onSubmit="return validIp(this.ipaddr.value);">
Your IP Address: <input type=text name="ipaddr"><br>
<input type=submit value="Submit">
</form>
qiushuiwuhen 2002-05-25
- 打赏
- 举报
<html>
<head>
<script language="JavaScript">
<!-- Hide
/*
*/
function validIp(ipstr)
{
//var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/;
alert(ipstr);
var IpPat=/^(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})$/;
var IPArray=ipstr.match(IpPat);
if (IPArray!=null)
{
// this is an IP address
for (var i=1;i<=4;i++)
{
if (IPArray[i]>255)
{
alert(" IP address is invalid!");
return false;
}
}
}else{
alert("IP address is invalid2!");
return false;
}
}
// -->
</script>
</head>
<body>
<form name=emailform onSubmit="validIp(this.ipaddr.value);return false;">
Your IP Address: <input type=text name="ipaddr"><br>
<input type=submit value="Submit">
</form>
<head>
<script language="JavaScript">
<!-- Hide
/*
*/
function validIp(ipstr)
{
//var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/;
alert(ipstr);
var IpPat=/^(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})$/;
var IPArray=ipstr.match(IpPat);
if (IPArray!=null)
{
// this is an IP address
for (var i=1;i<=4;i++)
{
if (IPArray[i]>255)
{
alert(" IP address is invalid!");
return false;
}
}
}else{
alert("IP address is invalid2!");
return false;
}
}
// -->
</script>
</head>
<body>
<form name=emailform onSubmit="validIp(this.ipaddr.value);return false;">
Your IP Address: <input type=text name="ipaddr"><br>
<input type=submit value="Submit">
</form>
