如何使用FileInputStream访问jar中的txt文件？ [英] How can I access a txt file in a jar with FileInputStream?

问题描述

我知道 getResourceAsStream（）方法，但是解析器读取文件存在问题，整个结构实现为期望 FileInputStream（）和 getResourceAsStream（）返回无法转换的输入流。这种情况有没有简单的修复？

I am aware of the getResourceAsStream() method but there is an issue with the parser that reads the file, the whole structure was implemented to expect a FileInputStream() and the getResourceAsStream() returns an input stream which cannot be casted. Is there any easy "fix" for this situation?

推荐答案

JAR文件中包含的资源本身不是文件，无法使用 FileInputStream 读取。如果您的代码绝对需要 FileInputStream ，那么您需要使用 getResourceAsStream（）提取数据，将其复制到一个临时文件中，然后将该临时文件的 FileInputStream 传递给您的代码。

A resource contained within a JAR file is not itself a file, and cannot be read using a FileInputStream. If you have code that absolutely requires a FileInputStream, then you'll need to extract the data using getResourceAsStream(), copy it into a temporary file, then pass a FileInputStream for that temporary file to your code.

当然，在将来，永远不要编写代码来期待具体的实现，比如 InputStream ，你总会后悔。

Of course, in future, never write code to expect concrete implementations of things like InputStream, you'll always regret it.

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