如何从内容类型获取文件扩展名? [英] How to get file extension from content type?

问题描述

我正在使用 Apache Tika，我有特定内容类型的文件(没有扩展名)，需要重命名以具有反映内容类型的扩展名.

I'm using Apache Tika, and I have files (without extension) of particular content type that need to be renamed to have extension that reflect the content type.

知道有什么我可以使用而不是基于内容类型名称从头开始编程的吗?

Any idea if there is something I could use instead of programming that from scratch based on content type names ?

推荐答案

你想查看文件 tika-mimetypes.xml -> 查看 tika 的源代码和:

You want to look at file tika-mimetypes.xml -> check out tika's source code and :

org.apache.tika.mime.MimeTypesReader

     } else if (nodeElement.getTagName().equals(GLOB_TAG)) {
         boolean useRegex = Boolean.valueOf(nodeElement.getAttribute(ISREGEX_ATTR));
         types.addPattern(type, nodeElement.getAttribute(PATTERN_ATTR), useRegex);

然后你可以机智地工作

org.apache.tika.mime.MimeTypes

      private Patterns patterns = new Patterns(registry);

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