在运行时加载Java字节码 [英] Load Java-Byte-Code at Runtime

问题描述

我得到了一些在程序中生成的Java字节码（因此是经过编译的Java源代码）。现在，我想将此字节代码加载到当前运行的Java-VM中并运行特定功能。我不确定如何做到这一点，我对Java类加载器进行了深入研究，但未找到直接方法。

I got some java-byte-code (so compiled java-source) which is generated in my program. Now I want to load this byte-code into the currently running Java-VM and run a specific function. I'm not sure how to accomplish this, I digged a little bit into the Java Classloaders but found no straight way.

我找到了一个使用类文件的解决方案在硬盘上，但是我得到的字节码在字节数组中，我不想将其写入磁盘，而是直接使用它。

I found a solution which takes a class-file on the harddisk, but the bytecode I got is in a Byte-Array and I dont want to write it down to the disk but use it directly instead.

谢谢！ / p>

Thanks!

推荐答案

您需要编写一个自定义的类加载器，该类加载器会使findClass方法超载

you need to write a custom class loader that overloads the findClass method

public Class findClass(String name) {
    byte[] b = ... // get the bytes from wherever they are generated
    return defineClass(name, b, 0, b.length);
}

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