从linux机器获取特定的mem和cpu值

 # 获取内存信息

 mem = psutil.virtual_memory()

 print("总内存：", mem.total)

 print("已使用内存：", mem.used)

 print("空闲内存：", mem.available)

 # 获取CPU信息

 cpu = psutil.cpu_percent()

 print("CPU使用率：", cpu)

 ```

 OperatingSystemMXBean osBean = ManagementFactory.getPlatformMXBean(OperatingSystemMXBean.class);

 // 获取内存信息

 long totalMemory = osBean.getTotalPhysicalMemorySize();

 long freeMemory = osBean.getFreePhysicalMemorySize();

 long usedMemory = totalMemory - freeMemory;

 System.out.println("总内存：" + totalMemory);

 System.out.println("已使用内存：" + usedMemory);

 System.out.println("空闲内存：" + freeMemory);

 // 获取CPU信息

 double cpuUsage = osBean.getSystemCpuLoad() * 100;

 System.out.println("CPU使用率：" + cpuUsage);

 ```