如何在Java 9中按其名称获取模块? [英] How to get a Module by its name in Java 9?

问题描述

如何在Java 9中按字符串名称获取java.lang.Module?

How to get java.lang.Module by string name in Java 9?

例如，我们有

String name = "some.module";
Module module = //how to get here it?

推荐答案

从引导层获取模块的一种方法是:初始化后至少包含java.base的引导层是

One way to get your module from the boot layer which consists at least java.base after its initialization is:

String moduleName = "my.module";
Module m = ModuleLayer.boot().findModule(moduleName).orElse(null);

尽管IMO最好是一种安全的方式，但要使用Configuration和系统ClassLoader来获取模块，则要使用

though preferably a safe way IMO, would be to get a module would be using the Configuration and the system ClassLoader to get the ModuleLayer of your module and then findModule as :

Path path = Paths.get("/path/to/your/module");

ModuleFinder finder = ModuleFinder.of(path);
ModuleLayer parent = ModuleLayer.boot();

Configuration configuration = parent.configuration().resolve(finder, ModuleFinder.of(), Set.of(moduleName));
ClassLoader systemClassLoader = ClassLoader.getSystemClassLoader();

ModuleLayer layer = parent.defineModulesWithOneLoader(configuration, systemClassLoader);
Module m = layer.findModule(moduleName).orElse(null);

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