java 获取系统信息

try {

OperatingSystemMXBean osMBean = ManagementFactory.newPlatformMXBeanProxy(

ManagementFactory.getPlatformMBeanServer(),

ManagementFactory.OPERATING_SYSTEM_MXBEAN_NAME,

com.sun.management.OperatingSystemMXBean.class);

cpuCount = osMBean.getAvailableProcessors();

systemLoadAverage = osMBean.getSystemLoadAverage();

systemLoad = osMBean.getSystemCpuLoad();

processLoad = osMBean.getProcessCpuLoad();

totalPhysicalMemorySize = osMBean.getTotalPhysicalMemorySize();
freePhysicalMemorySize = osMBean.getFreePhysicalMemorySize();
currentSwapMemorySize = osMBean.getTotalSwapSpaceSize() - osMBean.getFreeSwapSpaceSize();