如何从文件系统加载任意java .class文件并进行反思？ [英] How to load an arbitrary java .class file from the filesystem and reflect on it?

问题描述

我想制作一个命令行实用程序，该实用程序根据外部类文件的反映进行一些操作。我会传入.class文件或源文件（可能是通配符）的路径。在执行过程中的某个时刻，我需要为每个类获取Class对象，而不事先知道它们的包名称。要做什么呢？我应该如何看待入门？我也可以访问类的源文件。

I want to make a command-line utility that does some operations based on reflection of external class files. I would pass in a path to .class files or source files(possibly wildcards). At some point during the execution, I need to get Class objects for each class, not knowing their package names beforehand. What would it take to do this? What can I look at to get started? I also have access to the classes' source files.

这是在Java 1.6中。

this is in java 1.6.

推荐答案

您将需要创建一个 ClassLoader 并使用 defineClass 创建一个 Class 您已阅读的文件。 向您的应用程序添加动态Java代码是有趣的是，这类文章甚至描述了源代码的编译。

You will need to create a ClassLoader and use defineClass to create a Class from the file you've read. Add dynamic Java code to your application is an interesting to read about such things, it even describes the compilation of the sources.

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