与Windows路径名相对应的文件:URI应该是什么样的? [英] How should a file: URI corresponding to a Windows path name look like?

问题描述

我正在尝试通过代码动态加载MySQL jar，但是我不确定Windows路径名的格式.我下面使用的是正确的，用于从thumbdrive加载.jar吗?

I am trying to load a MySQL jar dynamically in code but I am unsure about the format of the Windows path name. Is what I am using below correct, for loading a .jar from a thumbdrive?

URL u = new URL("jar:file:G:/mysql-connector-java-5.1.15.jar!/");
URLClassLoader ucl = new URLClassLoader(new URL[] { u });

现在，这与您在Java教程中看到的传统路径不同:

Now, this is not the same as the traditional path that you see in Java tutorials:

URL url = new URL("file:/g:/mysql-connector-java-5.1.15.jar");

对于这个问题，我正在寻求澄清；我想我只是对"jar:file:"和！"感到困惑.最后.

For the answer, I am looking for clarification; I guess I am just confused by the "jar:file:" thing and also the "!" at the end.

推荐答案

在File对象上使用toURI()方法应该可以解决问题:

Using toURI() method on the File object should do the trick:

final URL u = new File("g:/something.jar").toURI().toURL();
URLClassLoader ucl = new URLClassLoader(new URL[] { u });

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