如何直接从内容创建 java.io.File 实例而不在磁盘上创建临时文件？
[英]How to create a java.io.File instance diectly from content without creating a temporary file on disk ?
问题描述
I have a library that sends an attachment along with an email after accepting a java.io.File instance as attachment.
我有一个库，在接受 java.io.File 实例作为附件后，它会随电子邮件一起发送附件。 Now I have html content with me to send as an attachment.现在我有 html 内容可以作为附件发送。
Is it possible to create a File instance to pass to this Java API when I have the content instead of creating a temporary physical file on disk ?当我拥有内容而不是在磁盘上创建临时物理文件时，是否可以创建一个 File 实例来传递给这个 Java API？
1 个解决方案
解决方案1
2 2014-04-10 10:49:43
A File is just a filename.文件只是一个文件名。 There is nothing on the disk when you instantiate one unless there really is such a file, or you do some I/O, or you call createNewFile() and friends.当你实例化一个磁盘时，磁盘上什么也没有，除非真的有这样的文件，或者你做了一些 I/O，或者你调用createNewFile()和朋友。
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