JAR 中的多个可运行类，如何运行它们? [英] Multiple runnable classes inside JAR, how to run them?

问题描述

我在从一个 JAR 文件运行多个不同的类时遇到问题.我知道我可以将 JAR 中的一个类设置为将在命令 java -jar myjar.jar 之后运行的 Main 类，但我想要的是:

I'm having problems with running multiple different classes from one JAR file. I know that I can set one of the classes inside JAR to by Main class that will be run after command java -jar myjar.jar, but what I want is something like:

java -jar myjar.jar MyClass

是否可以这样做，或者我是否必须创建多个 JAR(每个 JAR 用于一个可运行的类)，或者最好创建管理器"类来运行我的其他类并传递给它们命令行参数?
我正在寻找文档或参考资料，但找不到.

Is it possible to do this that way, or do I have to create multiple JAR (each for one runnable class), or is it better to create 'manager' class that will run my other classes passing to them command line arguments?
I was looking for documentation or reference, but I couldn't find any.

推荐答案

可执行 Jar 文件格式只允许您指定一个主类.为了让您能够执行不同的应用程序，您需要按照您的建议创建一个管理器"，或者改用类路径:

The executable Jar file format only allows you to specify one main class. In order for you to be able to execute different applications, you'll need to either create a "manager" as you suggest, or to use the classpath instead:

java -cp myjar.jar MyClass

但是，这种方法会忽略您在 Jar 的清单文件中配置的类路径.

However, this approach will ignore the classpath you have configured in the Jar's manifest file.

这篇关于JAR 中的多个可运行类，如何运行它们?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！