这是一个人为的例子，但它说明了我的问题。我想创建一个自定义<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>MAHASISWA</title>
<link rel="shortcut icon" href="code.ico">
<style>
#data tr:hover{
background-color: #aaa;
cursor: pointer;
}
#data tr:nth-child(even){
background-color: #ccc;
}
#data th{
background: #fff;
}
</style>
</head>
<body style="background-color:cornsilk">
<form action="<?php echo "mahasiswa.php"?>" method="post">
<fieldset align="center" style="border:5px solid black;margin:0px 500px">
<legend>Data</legend>
<table>
<tr>
<td>NIM</td>
<td><input min="0" type="number" name="nim"></td>
</tr>
<tr>
<td>Nama</td>
<td><input type="text" name="nama"></td>
</tr>
<tr>
<td>Jurusan</td>
<td><select name="jurusan" style="width:173px">
<option value="Sistem Informasi">Sistem Informasi</option>
<option value="Teknik Industri">Teknik Industri</option>
<option value="Teknik Informatika">Teknik Informatika</option>
<option value="Ilmu Komputasi">Ilmu Komputasi</option>
<option value="Sistem Komputer">Sistem Komputer</option>
</select></td>
</tr>
<tr>
<td><input type="submit" name="submit" value="INPUT"></td>
<td><input type="button" name="update" value="DELETE" disabled></td>
<td><input type="button" name="delete" value="UPDATE" disabled></td>
</tr>
</table>
</fieldset>
</form>
<table id="data" border="1" style="margin-top:50px" align="center">
<caption align="center">Tabel Data Mahasiswa</caption>
<tr style="text-align:center">
<strong>
<th width="150px">NIM</th>
<th width="250px">Nama</th>
<th width="250px">Jurusan</th>
</strong>
</tr>
<?php
$conn = mysqli_connect("localhost", "root", "root", "belajar");
$query = "select * from mahasiswa";
$result = mysqli_query($conn, $query);
if($result){
while($row = mysqli_fetch_row($result)){
?>
<tr onclick="settext(this.index)">
<td><?php echo $row[0]?></td>
<td><?php echo $row[1]?></td>
<td><?php echo $row[2]?></td>
</tr>
<?php }
mysqli_free_result($result);
mysqli_close($conn);
}
?>
</table>
<script>
function settext(x) {
var table = document.getElementById('id');
var a = table.rows[x].cells[0].innerHTML;
var b = table.rows[x].cells[1].innerHTML;
var c = table.rows[x].cells[2].innerHTML;
document.getElementByName('nim').value = parseInt(a);
document.getElementById('nama').value = b;
var opt = document.createElement('option');
opt.value = c;
opt.innerHTML = c;
document.getElementById('jurusan').appendChild(opt);
}
</script>
</body>
</html>
来对数据库进行编组/解组我的对象。它需要DynamoDBMarshaller<T> Spring bean，它需要在实例化后注入MyAttributeMarshaller类。但是，由于此类是通过@DynamoDBMarshalling（）注释创建的，因此它不受Spring管理。有没有办法让我的CustomMarshaller spring bean在MyAttributeMarshaller类中可用？
CustomMarshaller我的marsher班..
@DynamoDBTable(tableName = "MyTable")
public class ObjectInTable
{
@DynamoDBAttribute(attributeName = "myAttribute")
@DynamoDBMarshalling(marshallerClass = MyAttributeMarshaller.class)
public MyAttribute getMyAttribute() { ... }
public MyAttribute setMyAttribute(MyAttribute o) { ... }
}
** 更新 **
我找到了一个似乎首先创建一个Spring bean的解决方案：
@Named
public class MyAttributeMarshaller implements DynamoDBMarshaller<MyAttribute>
{
@Override
public String marshall(MyAttribute o)
{
return marshaller.marshall(o);
}
@Override
public ProviderContentReference unmarshall(Class<ProviderContentReference> clazz, String obj)
{
return marshaller.unmarshall(o);
}
@Inject
private CustomMarshaller marshaller; // ERROR: null
}
然后通过以下方式检索非Spring管理@Named
public class SpringContext implements ApplicationContextAware
{
private static ApplicationContext context;
public void setApplicationContext(ApplicationContext context) throws BeansException
{
this.context = context;
}
public static ApplicationContext getApplicationContext() {
return context;
}
}
中的自定义Marshaller
MyAttributeMarshaller答案 0 :(得分：0)
我不敢。您要求DynamoDB使用该Marshaller类的特定实例，该实例已由Spring注入CustomMarshaller。
你可以将一个CustomMarshaller实例放在一个静态的地方/字段中，然后从MyAttributeMarshaller中取出它，但这是一个黑暗的镜头，因为发布的代码不足以说肯定