不像在 AutoFac 中那么简单(因为已经有一个内置的方式),但可以通过一些编码来实现类似的东西:
using System.IO;
using System.Xml;
using Spring.Core.IO;
public class OptionalFileSystemResource : FileSystemResource
{
public OptionalFileSystemResource(string uri)
: base(uri)
{
}
public override Stream InputStream
{
get
{
if (System.IO.File.Exists(this.Uri.LocalPath))
{
return base.InputStream;
}
return CreateEmptyStream();
}
}
private static Stream CreateEmptyStream()
{
var xml = new XmlDocument();
xml.LoadXml("<objects />");
var stream = new MemoryStream();
xml.Save(stream);
stream.Position = 0;
return stream;
}
}
注册一个节处理程序:
<sectionGroup name="spring">
...
<section name="resourceHandlers" type="Spring.Context.Support.ResourceHandlersSectionHandler, Spring.Core"/>
...
</sectionGroup>
...
<spring>
<resourceHandlers>
<handler protocol="optionalfile" type="MyCoolStuff.OptionalFileSystemResource, MyCoolStuff" />
</resourceHandlers>
...
<context>
<resource uri="file://Config/MyMandatoryFile.xml" />
<resource uri="optionalfile://Config/MyOptionalFile.xml" />
...
您将在Spring.Net 文档中找到有关资源和资源处理程序的更多信息。