js 用createElement新建了一个select元素，然后向select的option中添加数据库中数据，如何操作？急!!!!

Posted 2023-03-18

var select=document.createElement("select");
现已得出数据库中有num个数据
for(var x=0;x<num;x++)

select.options[x]=new Option("<?php
$db=mysql_connect('localhost','root','')or die('Unable to Connect.Check your connection parameters.');
mysql_select_db('experiment',$db)or die(mysql_error($db));
mysql_query('SET NAMES utf-8');
$account=(int)$_SESSION['account']
$query="select *from teacher where teacher_id=$account";
$result=mysql_query($query,$db)or die(mysql_error($db));
$row=mysql_fetch_array($result);
if($row)


$arrClass=array();
$arrClass=split('[;]',$row['teacher_class']);
echo $arrClass[与x的值对应];//这行怎么写?

?>"，num);
请问注释这行怎么写，时option中获得对应的数据库元素？
或有高手有其他方法实现同样功能，请赐教。

jQuery.fn.addOption = function(text,value)

jQuery(this).get(0).options.add(new Option(text,value));

这是个脚本,为指定select追加option
function openendtime()
//var beginvalue= $(timeBegin).val();
$(timeEnd).empty();//添加前清空select选项
//alert(beginvalue);
for(i=0;i<这里是mysql返回的数据集长度;i++)
$(timeEnd).addOption(显示值,option的value值);//调用




修改下你应该就可以用!!!追问

看不懂

追答

jquery没听过? 比js好用很多啊...

参考技术A <script type="text/javascript">
var select=document.createElement("select");
<?php
$db=mysql_connect('localhost','root','')or die('Unable to Connect.Check your connection parameters.');
mysql_select_db('experiment',$db)or die(mysql_error($db));
mysql_query('SET NAMES utf-8');
$account=(int)$_SESSION['account']
$query="select *from teacher where teacher_id=$account";
$result=mysql_query($query,$db)or die(mysql_error($db));
$row=mysql_fetch_array($result);
if($row)

$arrClass=array();
$arrClass=split('[;]',$row['teacher_class']);
for($x = 0; $x < count($arrClass);$x++)
?>
select.options[<?=$x?>]=new Option('<?=$arrClass[$x]?>', '<?=$x?>');
<?php


?>

document.body.appendChild(select);
</script>

用java新建xml文件和读取

//新建一个xml文档

 

private static void createXml(String path) throws UnsupportedEncodingException, FileNotFoundException, IOException {
//创建根节点
Element rootElement = DocumentHelper.createElement("student");
rootElement.addAttribute("sno", "20160810001");
//创建子节点
Element unameElement = DocumentHelper.createElement("uname");
unameElement.setText("张三");
Element pwdElement = DocumentHelper.createElement("pwd");
pwdElement.setText("123456");

rootElement.add(unameElement);
rootElement.add(pwdElement);
//创建一个文档
Document document = DocumentHelper.createDocument(rootElement);

//写出到硬盘
OutputFormat format = OutputFormat.createPrettyPrint();
format.setEncoding("GBK");
XMLWriter writer = new XMLWriter(new FileOutputStream(path), format);
writer.write(document);
}