获取资源的大小 [英] Get the size of a resource

问题描述

我正在使用 getClass().getResourceAsStream(path)从捆绑资源中读取.

I'm using getClass().getResourceAsStream(path) to read from bundle resources.

在读取整个流之前，我如何知道文件大小?

How can I know the file size before reading the entire stream?

打包后，我无法使用 getClass().getResource(path).toURI()来访问它们，因此将无法正常工作.

I can't access them with getClass().getResource(path).toURI() when it's packaged, so that won't work.

推荐答案

自然地，您无法查询流的总大小，因为根据定义，它不能使整个文件可用.想想将手伸到河里吧.您有一条小溪，但是您必须把整条河都掌握在手中，才能知道总流量.

Naturally you cannot query the total size of a stream, since by definition it does not make the whole file available to you. Think of popping your hand in a river. You have a piece of the stream,but you have to put the entire river in your hand to know the total volume.

在这种情况下，您必须将整个文件作为流读取并计算大小.请记住，您正在处理的类和资源可能是JAR文件或其他类型的压缩资源的一部分.在这种情况下，类加载器不必为资源提供文件句柄

In this case, you have to read the entire file as a stream and count the size. Remember you are dealing with classes and resources that may be part of a JAR file or other kind of compressed resource. The classloader does not have to provide a file handle to the resource in this case

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