如何使用java获取cpu使用率？

OperatingSystemMXBean osBean = ManagementFactory.getOperatingSystemMXBean();

if (osBean instanceof com.sun.management.OperatingSystemMXBean) {
    com.sun.management.OperatingSystemMXBean sunOsBean = (com.sun.management.OperatingSystemMXBean) osBean;
    double cpuUsage = sunOsBean.getSystemCpuLoad();
    // 处理CPU使用率数据
} else {
    // 操作系统不支持获取CPU使用率
}