我知道这是一个旧线程，但我想要调用用于获取PID的API(以及在运行时对Java进程的其他操作)正在添加到JDK 9中的process类:http://openjdk.java.net/jeps/102

这是我有类似需求时使用的。这将正确地确定Java进程的PID。让您的java代码在预定义的端口号上生成服务器，然后执行操作系统命令找出在端口上侦听的PID。Linux

netstat -tupln | grep portNumber

下面是一个后门方法，它可能不适用于所有的虚拟机，但应该适用于linux和windows(原始示例):

java.lang.management.RuntimeMXBean runtime = 
    java.lang.management.ManagementFactory.getRuntimeMXBean();
java.lang.reflect.Field jvm = runtime.getClass().getDeclaredField("jvm");
jvm.setAccessible(true);
sun.management.VMManagement mgmt =  
    (sun.management.VMManagement) jvm.get(runtime);
java.lang.reflect.Method pid_method =  
    mgmt.getClass().getDeclaredMethod("getProcessId");
pid_method.setAccessible(true);

int pid = (Integer) pid_method.invoke(mgmt);

这是JConsole，可能还有jps和VisualVM使用的代码。它利用类 sun.jvmstat.monitor。* tool.jar中的包

package my.code.a003.process;

import sun.jvmstat.monitor.HostIdentifier;
import sun.jvmstat.monitor.MonitorException;
import sun.jvmstat.monitor.MonitoredHost;
import sun.jvmstat.monitor.MonitoredVm;
import sun.jvmstat.monitor.MonitoredVmUtil;
import sun.jvmstat.monitor.VmIdentifier;


public class GetOwnPid {

    public static void main(String[] args) {
        new GetOwnPid().run();
    }

    public void run() {
        System.out.println(getPid(this.getClass()));
    }

    public Integer getPid(Class<?> mainClass) {
        MonitoredHost monitoredHost;
        Set<Integer> activeVmPids;
        try {
            monitoredHost = MonitoredHost.getMonitoredHost(new HostIdentifier((String) null));
            activeVmPids = monitoredHost.activeVms();
            MonitoredVm mvm = null;
            for (Integer vmPid : activeVmPids) {
                try {
                    mvm = monitoredHost.getMonitoredVm(new VmIdentifier(vmPid.toString()));
                    String mvmMainClass = MonitoredVmUtil.mainClass(mvm, true);
                    if (mainClass.getName().equals(mvmMainClass)) {
                        return vmPid;
                    }
                } finally {
                    if (mvm != null) {
                        mvm.detach();
                    }
                }
            }
        } catch (java.net.URISyntaxException e) {
            throw new InternalError(e.getMessage());
        } catch (MonitorException e) {
            throw new InternalError(e.getMessage());
        }
        return null;
    }
}

这里有几个问题:

The tool.jar is a library distributed with Oracle JDK but not JRE! You cannot get tool.jar from Maven repo; configure it with Maven is a bit tricky The tool.jar probably contains platform dependent (native?) code so it is not easily distributable It runs under assumption that all (local) running JVM apps are "monitorable". It looks like that from Java 6 all apps generally are (unless you actively configure opposite) It probably works only for Java 6+ Eclipse does not publish main class, so you will not get Eclipse PID easily Bug in MonitoredVmUtil?

更新:我刚刚再次检查了JPS使用这种方式，即Jvmstat库(tool.jar的一部分)。因此，不需要调用JPS作为外部进程，直接调用Jvmstat库，如我的示例所示。你也可以通过这种方式获取在本地主机上运行的所有jvm的列表。 参见JPS源代码:

试试西格尔。非常广泛的api。Apache 2 license。

private Sigar sigar;

public synchronized Sigar getSigar() {
    if (sigar == null) {
        sigar = new Sigar();
    }
    return sigar;
}

public synchronized void forceRelease() {
    if (sigar != null) {
        sigar.close();
        sigar = null;
    }
}

public long getPid() {
    return getSigar().getPid();
}

下面的方法尝试从java.lang.management.ManagementFactory中提取PID:

private static String getProcessId(final String fallback) {
    // Note: may fail in some JVM implementations
    // therefore fallback has to be provided

    // something like '<pid>@<hostname>', at least in SUN / Oracle JVMs
    final String jvmName = ManagementFactory.getRuntimeMXBean().getName();
    final int index = jvmName.indexOf('@');

    if (index < 1) {
        // part before '@' empty (index = 0) / '@' not found (index = -1)
        return fallback;
    }

    try {
        return Long.toString(Long.parseLong(jvmName.substring(0, index)));
    } catch (NumberFormatException e) {
        // ignore
    }
    return fallback;
}

例如，只需调用getProcessId("<PID>")。