查找实现接口的Java类 [英] Find Java classes implementing an interface

问题描述

前一段时间，我遇到了一段代码，它使用了一些标准的Java功能来定位实现给定接口的类。我知道函数隐藏在一些非逻辑位置，但它们可以用于其他类，因为包含的名称是隐含的。那时我不需要它，所以我忘了它，但现在我做了，我似乎无法再找到这些功能。在哪里可以找到这些函数？

Some time ago, I came across a piece of code, that used some piece of standard Java functionality to locate the classes that implemented a given interface. I know the functions were hidden in some non-logical place, but they could be used for other classes as the package name implied. Back then I did not need it, so I forgot about it, but now I do, and I can't seem to find the functions again. Where can these functions be found?

编辑：我不是在寻找任何IDE函数或任何东西，而是可以在Java应用程序中执行的东西。

I'm not looking for any IDE functions or anything, but rather something that can be executed within the Java application.

推荐答案

前一段时间，我整理了一个包，用于做你想做的事情，等等。 （我需要它用于我正在编写的实用程序）。它使用 ASM 库。你可以使用反射，但ASM结果表现更好。

Awhile ago, I put together a package for doing what you want, and more. (I needed it for a utility I was writing). It uses the ASM library. You can use reflection, but ASM turned out to perform better.

我将我的包放在我网站上的开源库中。该库位于： http://software.clapper.org/javautil/ 。您想从使用 ClassFinder 课程开始。

I put my package in an open source library I have on my web site. The library is here: http://software.clapper.org/javautil/. You want to start with the with ClassFinder class.

我为它编写的实用程序是一个RSS阅读器，我仍然每天都在使用它，因此代码确实会被运用。我使用ClassFinder来支持RSS阅读器中的插件API;在启动时，它在几个目录树中查找包含实现特定接口的类的jar和类文件。它比你预期的要快得多。

The utility I wrote it for is an RSS reader that I still use every day, so the code does tend to get exercised. I use ClassFinder to support a plug-in API in the RSS reader; on startup, it looks in a couple directory trees for jars and class files containing classes that implement a certain interface. It's a lot faster than you might expect.

该库是BSD许可的，因此你可以安全地将它与你的代码捆绑在一起。来源可用。

The library is BSD-licensed, so you can safely bundle it with your code. Source is available.

如果这对您有用，请自己帮助。

If that's useful to you, help yourself.

更新：如果您正在使用Scala，您可能会发现此库对Scala更友好。

Update: If you're using Scala, you might find this library to be more Scala-friendly.

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