网页开发的阶段总结(四)--JS与PHP之间大数据的传送

        在前面 的网页开发的阶段总结(三)中,我们知道JS与PHP之间直接互相调用,往往有很多不便,而且一次只能传送一个数据结果进行返回。而通过ajax方法可以实现JS一次性读取php的所传送过来的大量数据。通过提交表单的方式,让php可以一次性读取JS的大量数据。

1、借用AJAX方法,通过php读取数据库将大量数据显示在网页客户端上。

     a、页面一加载完,执行函数Gett(),代码如下:

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset="gb2312">
<title></title><script language="JavaScript" src="javascript.js"></script>
<script language="JavaScript">

function Gett()
{		  	

	if (window.XMLHttpRequest)
		  {
		  // code for IE7+, Firefox, Chrome, Opera, Safari
		   xmlHttp=new XMLHttpRequest();
		   var url="responsexml.php";	
		   xmlHttp.open("GET",url,false);
		   xmlHttp.send(null);
		  xmlHttp.onreadystatechange=getValue(xmlHttp);
		   
			
		  }
	else
		  {
		  // code for IE6, IE5
		     xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
		     var url="responsexml.php";		  
			 xmlHttp.onreadystatechange=function()
			  {
				if (xmlHttp.readyState==4  && xmlHttp.status==200)
					{
					    xmlDoc=xmlHttp.responseXML; 
						nodes=xmlDoc.documentElement.childNodes;
						InputVoltage.innerHTML = nodes.item(3).text;
						OutputVoltage.innerHTML = nodes.item(7).text;
						OutputMinVoltage.innerHTML = nodes.item(34).text;
						 OutputMaxVoltage.innerHTML = nodes.item(33).text;
						Frequency.innerHTML = nodes.item(13).text;		
						xmlHttp = null;
					}			
			  }
			  
			 xmlHttp.open("GET",url,true);
			 xmlHttp.send(null);
		 
		  }
		  
}
 

</script>
</head>

<body onload="Gett()">
<p> </p>
<div align="center">
<br>
  <table width="75%" border="0" cellspacing="0">
    <tr>
      <td width="25%" nowrap><br>
        <table width="75%" border="0" align="center" cellspacing="0">
          <tr>
            <td width="50%" nowrap>InputVoltage</td>
            <td width="50%" height="22" nowrap>
               <span id='InputVoltage'></span> V
            </td>
          </tr>
          <tr>
            <td nowrap>Frequency</td>
            <td nowrap>
              <span id='Frequency'></span> Hz
            </td>
          </tr>
        </table></td>
      <td width="50%" nowrap>
		<div align="center">
	</div></td>
      <td width="25%" nowrap>
	  	<table width="98%" height="100" border="0" cellspacing="0">
          <tr>
            <td width="50%" nowrap>OutputVoltage</td>
            <td width="50%" height="22" nowrap>
              <span id='OutputVoltage'></span> V
            </td>
          </tr>
          <tr>
            <td nowrap>OutputMaxVoltage</td>
            <td height="22" nowrap>
              <span id='OutputMaxVoltage'></span> V
            </td>
          </tr>
          <tr>
            <td nowrap>OutputMinVoltage</td>
            <td height="22" nowrap>
              <span id='OutputMinVoltage'></span> V
            </td>
          </tr>
		  
</div>
</body>
</html>

b、在服务端,将数据库的内容转为一维数组,并用xml格式保存起来。 

     

<?php 

    $dbh = new PDO("sqlite:upsdata.dat", null, null);  
	
    $sth = $dbh->query('SELECT * FROM t_ups_rundata');
	
	 $result = $sth->fetchAll();
	 $i=0;
	 $CountArray=0;
	 foreach($result[0] as $x=>$x_value)
	 		{
				
			   if($i%2==0)
			    {									
					$UPSData[$CountArray++]=$x_value;
				}
					$i++;
			}
header('Content-Type: text/xml');
echo "<?xml version='1.0' encoding='utf-8'?>";
echo "<upsdataxml>";    
echo	"<protocol_id>$UPSData[0]</protocol_id>";
echo    "<curr_time>$UPSData[1]</curr_time>";
echo 	"<input_phase>$UPSData[2]</input_phase>";
echo    "<inputvol_a>$UPSData[3]</inputvol_a>";	 
echo    "<inputvol_b>$UPSData[4]</inputvol_b>";	 
echo    "<inputvol_c>$UPSData[5]</inputvol_c>";	 
echo 	"<output_phase>$UPSData[6]</output_phase>";
echo    "<outputvol_a>$UPSData[7]</outputvol_a>";  
echo    "<outputvol_b>$UPSData[8]</outputvol_b>";  
echo    "<outputvol_c>$UPSData[9]</outputvol_c>";  
echo 	"<output_load>$UPSData[10]</output_load>";
echo 	"<batt_total_vol>$UPSData[11]</batt_total_vol>";
echo	"<batt_cap>$UPSData[12]</batt_cap>";
echo	"<input_fre>$UPSData[13]</input_fre>";
echo	"<ups_model>$UPSData[14]</ups_model>";
echo	"<ups_manufactory>$UPSData[15]</ups_manufactory>";
echo	"<ups_ver>$UPSData[16]</ups_ver>";
echo	"<rate_vol>$UPSData[17]</rate_vol>";
echo	"<rate_power>$UPSData[18]</rate_power>";
echo	"<rate_fre>$UPSData[19]</rate_fre>";
echo	"<rate_battvol>$UPSData[20]</rate_battvol>";
echo	"<is_acfail>$UPSData[21]</is_acfail>";
echo	"<is_bypass>$UPSData[22]</is_bypass>";
echo	"<is_battlow>$UPSData[23]</is_battlow>";
echo	"<is_upsfail>$UPSData[24]</is_upsfail>";
echo	"<is_shutdown>$UPSData[25]</is_shutdown>";
echo	"<is_testting>$UPSData[26]</is_testting>";
echo	"<is_ups_offline>$UPSData[27]</is_ups_offline>";
echo	"<e_temperature>$UPSData[28]</e_temperature>";
echo 	"<e_humidity>$UPSData[29]</e_humidity>";
echo	"<input_default_vol>$UPSData[30]</input_default_vol>";
echo	"<batt_mon_vol>$UPSData[31]</batt_mon_vol>";
echo	"<ups_temp>$UPSData[32]</ups_temp>";
echo	"<output_max_vol>$UPSData[33]</output_max_vol>";
echo	"<output_min_vol>$UPSData[34]</output_min_vol>";
echo	"<batt_temp>$UPSData[35]</batt_temp>";
echo	"<is_horn>$UPSData[36]</is_horn>";
echo	"<is_ups_type>$UPSData[37]</is_ups_type>";
echo	"<is_guard>$UPSData[38]</is_guard>";
echo "</upsdataxml>";

 

$dbh = null;
?>

完整代码下载:http://download.csdn.net/detail/aba13579/7877307






2、通过提交表单的方式,在php服务器端的用$_GET()或$_POST()方式获取大量的数据写入数据库。

     a、通过  <input class="inputButtonNormal" type="submit" name="b1" value="SubMit">的type="submit"类型将数据上传到PHP服务端上。  

       

 <html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset="gb2312">
<script language="JavaScript">
</script>
</head>
<body>
  <form name="UPSCfg"  target="id_iframe"  method="post" action="UPSCfgForm.php">   
    <table width="80%" border="0" cellspacing="0" class="tableNormal" >
      <tr bgcolor="#0099FF">
    </tr>
		<tr>
            <td class="tableSingularLine" width="50%" nowrap>UpsCommBaud</td>
            <td  class="tableSingularLine" width="50%" nowrap>
				   <select name="UpsCommBaud" size="1" type="text">		
						<option value="1200"
						<?php
						$b=2400;
						if ($b==1200)
							echo("selected");
						?>
						>1200</option>
						<option value="2400"
						<?php
						if (($b==2400)||($b==0))
							echo("selected");
						?>>2400</option>
						<option value="4800"
						<?php
						if ($b==4800)
							echo("selected");
						?>>4800</option>
						<option value="9600"
						<?php
						if ($b==9600)
							echo("selected");
						?>>9600</option>
						<option value="14400"
						<?php
						if ($b==14400)
							echo("selected");
						?>>14400</option>
						<option value="19200"
						<?php
						if ($b==19200)
							echo("selected");
						?>>19200</option>
						<option value="38400"
						<?php
						if ($b==38400)
							echo("selected");
						?>>38400</option>
					</select> 	            
		    </td>
        </tr> 
   
    <tr>
     <td class="tableSingularLine" nowrap>OfflineQueryTime</td>
	 <td class="tableSingularLine" nowrap><input class="textEnaSty" name="OfflineQueryTime" type="text" value="1000"   size="1"> 
	 </td>
	</tr>
	
	 <tr>
        <td class="tableSingularLine" nowrap>OfflineQueryNum</td>
        <td class="tableSingularLine" nowrap><input class="textEnaSty" name="OfflineQueryNum" type="text" value="1" size="5"></td>
     </tr>
    </table>
	
    <p>
      <input class="inputButtonNormal" type="submit" name="b1" value="SubMit">
       
      <input class="inputButtonNormal" type="reset" name="Reset" value="Cacel">
    </p>
    <iframe name="id_iframe"  style="display:none;" src="about:blank"></iframe>
 </form>
</body>
<html>

 b、PHP服务器端通过$_POST()获取数据写入数据库

    

<?php
 $temp = array();

 $temp[0] = $_POST["UpsCommBaud"];
 $temp[1] = $_POST["OfflineQueryTime"];
 $temp[2] = $_POST["OfflineQueryNum"];

 
 try{ 

	$IPGuard ="sqlite:ipguard.dat";
	$dbh = new PDO($IPGuard, null, null); 
	$dbh->exec("UPDATE t_ups_protocol set baudrate='$temp[0]'");
	$dbh->exec("UPDATE t_env_param set interval='$temp[1]',offLine_Count='$temp[2]'");
	$dbh->beginTransaction();
	$dbh = null;
	}	
catch (PDOException $e)
{
   echo 'Connection failed: ' . $e->getMessage();
   $dbh = null;
} 
?>




完整代码下载:http://download.csdn.net/detail/aba13579/7877311


3、借用AJAX方式,一次性传递一个数据到php服务器上并一次性将一个数据返回给web客户端。

      以下网址有详细介绍:http://www.w3school.com.cn/ajax/ajax_asp_php.asp,故不再详述。

   

     

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