查看他的登陆页面的代码，看他提交到哪个页面，变量是什么。
复制代码 代码如下:
<formmethod="post"action="login.jsp">
<tablealign="center"width="40%"style="FONT-SIZE:12px"border="0"cellpadding="0"cellspacing="2">
<tr>
<tdwidth="30%"align="right"bgcolor="#0073AA"style="FONT-SIZE:12px;color:#ffffff">name:</td>
<tdwidth="70%"><inputtype="text"size="30"name="username"></td>
</tr>
<tr>
<tdwidth="30%"align="right"bgcolor="#0073AA"style="FONT-SIZE:12px;color:#ffffff">password:</td>
<tdwidth="70%"><inputtype="password"size="32"name="passwd"></td>
</tr>
<tr>
<tdcolspan="2"align="right">
<inputtype="submit"name="submit"value="Login">&nbsp;
<inputtype="button"name="submit"value="regest"onclick="location.href='regest.jsp'">
</td>
</tr>
</table>
</form>

很明显，如果你要登陆，你需要把username,passwd,submit这几个变量post到login.jsp，而且submit=Login
用以下代码：
复制代码 代码如下:
<?php
$postData="username=your_name&password=your_password&Submit=Login";
$posturl="http://......../../login.jsp";

$postUrl=parse_url($posturl);
$host=$postUrl[host]?$postUrl[host]:"";
$port=$postUrl[port]?$postUrl[port]:80;
$path=$postUrl[path]?$postUrl[path]:"/";



$fsp=fsockopen($host,$port,&$errno,&$errstr,30);
if(!$fsp){
print"\nopensocketfailed\n";
}else{
fwrite($fsp,"POST".$path."HTTP/1.1\r\n");
fwrite($fsp,"Accept:image/gif,image/x-xbitmap,image/jpeg,image/pjpeg,application/x-shockwave-flash,application/vnd.ms-excel,application/vnd.ms-powerpoint,application/msword,*/*\r\n");
fwrite($fsp,"Accept-Language:zh-cn\r\n");
fwrite($fsp,"Content-Type:application/x-patible;MSIE6.0;WindowsNT5.1;SV1;Maxthon)\r\n");
fwrite($fsp,"Host:".$host."\r\n");
fwrite($fsp,"Content-Length:".strlen($postData)."\r\n\r\n");
fwrite($fsp,$postData);

$resp="";
do{
if(strlen($out=fread($fsp,1024))==0)break;
$resp.=$out;
}while(true);

echo"<br><br>".nl2br($resp);

fclose($fsp);

}
?>