在localhost上运行JVM的列表 [英] List of running JVMs on the localhost

问题描述

如何在Java 6+中获取localhost上运行的JVM列表及其规范（即Java版本，运行线程等）？

How to get in Java 6+ the list of running JVMs on the localhost and their specs (i.e. Java version, running threads, etc.)?

是否Java API提供了这样的功能？是否有可以执行此操作的Java库？

Does the Java API provide such features? Is there a Java library that can do this?

推荐答案

您可以使用 jps ，一个分发的命令行工具与jvm。但是，我不知道它有任何普通的Java API。但是，JConsole可以做你所要求的，所以我看看它的来源。这是非常可怕的，但在环顾四周时，我发现了对jVisualVM类的引用，当你指定Java 6+时，可以看到它们。这是我发现的：

You can use jps, a command-line tool distributed with the jvm. I'm not aware of any normal Java API for it, though. However, JConsole can do what you ask, so I had a look at its source. It was quite scary, but while looking around I found references to the jVisualVM classes, which are OK seeing as you specify Java 6+. Here's what I found:

这些类都在 sun.tools 中，所以首先你必须找到<您的JVM附带的code> jconsole.jar （当然假设是Sun JVM）并将其添加到您的类路径中。然后可以得到一个快速脏的活动虚拟机列表：

The classes are all in sun.tools, so firstly you have to find the jconsole.jar that came with your JVM (assumes Sun JVM, of course) and add it to your classpath. Then a quick-n-dirty listing of the active VMs can be got like:

public static void main(final String[] args) {
    final Map<Integer, LocalVirtualMachine> virtualMachines = LocalVirtualMachine.getAllVirtualMachines();
    for (final Entry<Integer, LocalVirtualMachine> entry : virtualMachines.entrySet()) {
        System.out.println(entry.getKey() + " : " + entry.getValue().displayName());
    }
}

一旦你有了对JVM的引用，您可以使用附加API 与他们沟通。

Once you've got a reference to your JVMs, you can communicate with them using the Attach API.

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