如果您正在使用Jrockit虚拟机，那么这里有另一种获取虚拟机CPU使用情况的方法。运行时bean还可以提供每个处理器的CPU负载。我只在Red Hat Linux上使用它来观察Tomcat性能。您必须在catalina.sh中启用JMX remote才能使其工作。

JMXServiceURL url = new JMXServiceURL("service:jmx:rmi:///jndi/rmi://my.tomcat.host:8080/jmxrmi");
JMXConnector jmxc = JMXConnectorFactory.connect(url, null);     
MBeanServerConnection conn = jmxc.getMBeanServerConnection();       
ObjectName name = new ObjectName("oracle.jrockit.management:type=Runtime");
Double jvmCpuLoad =(Double)conn.getAttribute(name, "VMGeneratedCPULoad");

至于窗户，我走这边。

    com.sun.management.OperatingSystemMXBean os = (com.sun.management.OperatingSystemMXBean) ManagementFactory.getOperatingSystemMXBean();

    long physicalMemorySize = os.getTotalPhysicalMemorySize();
    long freePhysicalMemory = os.getFreePhysicalMemorySize();
    long freeSwapSize = os.getFreeSwapSpaceSize();
    long commitedVirtualMemorySize = os.getCommittedVirtualMemorySize();

这里有详细的链接。

不是你想要的，但是我建议你从common -lang3中查看ArchUtils和SystemUtils。它们还包含一些相关的辅助工具，例如:

import static org.apache.commons.lang3.ArchUtils.*;
import static org.apache.commons.lang3.SystemUtils.*;

System.out.printf("OS architecture: %s\n", OS_ARCH); // OS architecture: amd64
System.out.printf("OS name: %s\n", OS_NAME);         // OS name: Linux
System.out.printf("OS version: %s\n", OS_VERSION);   // OS version: 5.18.16-200.fc36.x86_64

System.out.printf("Is Linux? - %b\n", IS_OS_LINUX);     // Is Linux? - true
System.out.printf("Is Mac? - %b\n", IS_OS_MAC);         // Is Mac? - false
System.out.printf("Is Windows? - %b\n", IS_OS_WINDOWS); // Is Windows? - false

System.out.printf("JVM name: %s\n", JAVA_VM_NAME);       // JVM name: Java HotSpot(TM) 64-Bit Server VM
System.out.printf("JVM vendor: %s\n", JAVA_VM_VENDOR);   // JVM vendor: Oracle Corporation
System.out.printf("JVM version: %s\n", JAVA_VM_VERSION); // JVM version: 11.0.12+8-LTS-237

System.out.printf("Username: %s\n", getUserName()); // Username: johndoe
System.out.printf("Hostname: %s\n", getHostName()); // Hostname: garage-pc

var processor = getProcessor();
System.out.printf("CPU arch: %s\n", processor.getArch())  // CPU arch: BIT_64
System.out.printf("CPU type: %s\n", processor.getType()); // CPU type: X86

它仍在开发中，但您已经可以使用jHardware了

它是一个使用Java丢弃系统数据的简单库。它在Linux和Windows上都可以运行。

ProcessorInfo info = HardwareInfo.getProcessorInfo();
//Get named info
System.out.println("Cache size: " + info.getCacheSize());        
System.out.println("Family: " + info.getFamily());
System.out.println("Speed (Mhz): " + info.getMhz());
//[...]

一个简单的方法可以用来获得操作系统级别的信息，我在我的Mac上测试，效果很好:

 OperatingSystemMXBean osBean =
        (OperatingSystemMXBean)ManagementFactory.getOperatingSystemMXBean();
    return osBean.getProcessCpuLoad();

您可以在这里找到操作系统的许多相关指标

看一下java.lang.management包中可用的api。例如:

OperatingSystemMXBean.getSystemLoadAverage () ThreadMXBean.getCurrentThreadCpuTime () ThreadMXBean.getCurrentThreadUserTime ()

还有很多其他有用的东西。