使用javax.tools.JavaCompiler在内存中完全编译代码 [英] Compile code fully in memory with javax.tools.JavaCompiler

问题描述

我使用javax.tools包（JDK 1.7）中的JavaCompiler即时编译一些东西，如下所示：

I'm using the JavaCompiler from the javax.tools package (JDK 1.7) to compile some stuff on the fly, like this:

compiler.run(null, null, "-cp", paths, "path/to/my/file.java");

它可以工作，但我想在内存中做这一切（例如传递一个字符串的代码，不是源文件，并且获取字节代码不是一个.class文件）。我发现扩展 InputStream 和 OutputStream 参数没有用，因为它可能与在控制台中相同。你知道一种方法来使运行方法这样工作吗？或者你知道用 getTask（）方法确认的方法吗？ （扩展FileManager看起来很容易，但不是那么容易：）

It works but I would like to do it all in memory (e.g. pass a string with the code, not the source file, and get the byte code back not a .class file). I found that extending the InputStream and OutputStream parameters is no use since it's probably just the same as in the console. Do you know a way to make the run method work like this? Or do you know a confirmed way to do this with the getTask() method? (extending the FileManager looks easy but isn't that easy :)

推荐答案

我在Mac OS Java中运行上面的代码7.他们都没有工作。所以我写了一个
https://github.com/trung/InMemoryJavaCompiler

I've run the above code in Mac OS Java 7. None of them works. So i wrote one https://github.com/trung/InMemoryJavaCompiler

StringBuffer sourceCode = new StringBuffer();
sourceCode.append("package org.mdkt;\n");
sourceCode.append("public class HelloClass {\n");
sourceCode.append("   public String hello() { return \"hello\"; }");
sourceCode.append("}");

Class<?> helloClass = InMemoryJavaCompiler.compile("org.mdkt.HelloClass", sourceCode.toString());

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