如何在IDEA中使用类路径而不是模块路径运行Java 9应用程序？ [英] How to run Java 9 application with classpath rather than module path in IDEA?

问题描述

当我在IDEA中运行主类时，它将模块及其依赖项放在模块路径上。是否可以将其更改为类路径？

When I run a main class in IDEA, it puts the module and its dependencies on a module path. Is it possible to change it to a classpath?

推荐答案

如果您没有定义模块信息，IDEA会设置应用程序和您对类路径的依赖关系。由于你有一个模块信息，它是一个显式模块，所以它必须在模块路径上。通常，您现在可以将自己的dependecies作为自动模块处理。

If you don't define a module-info, IDEA would set the application and your dependencies on the classpath. Since you have a module-info it's an explicit module so it has to be on the module path. Normally you would handle your dependecies now as automatic-modules.

但是，您的依赖关系至少有充分的理由进入类路径。我们在这里讨论了为什么Java 9不会简单地将类路径上的所有JAR转换为自动模块？

Howsoever, your dependencies at least have a good reason to be on the classpath. We discussed that here Why Java 9 does not simply turn all JARs on the class path into automatic modules?

例如，mymodule依赖于自动模块然而，它需要一个不能成为自动模块的jar。在命令行上它会这样：

For example, mymodule depends on an automatic-module which however needs a jar that can't become an automatic-module yet. On commandline it would like this:

java -cp legacy.jar -pmymodule.jar; automodule.jar; -m mymodule / com.example.mymodule.Application

java -cp legacy.jar -p "mymodule.jar;automodule.jar;" -m mymodule/com.example.mymodule.Application

IMO intellij目前不支持。作为至少在类路径上运行整个应用程序的解决方法，您可以重命名模型信息以禁用/暂时不是拼图模块。

IMO intellij doesn't currently support that. As a workaround to run the entire application on the classpath at least, you could rename the model-info for disabling/not to be a jigsaw-module for a moment.

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