JAVA获取系统相关的信息

无意间找到了个好东西，记录下！

1获取JVM输入参数

List<String> list=ManagementFactory.getRuntimeMXBean().getInputArguments();

2.获取当前JVM进程的PID

String name = ManagementFactory.getRuntimeMXBean().getName();  

String pid = name.split("@")[0];  

3.获取当前系统的负载

ManagementFactory.getOperatingSystemMXBean().getSystemLoadAverage()

4.获取内存相关的

ManagementFactory.getMemoryMXBean().getHeapMemoryUsage();//堆内存

ManagementFactory.getMemoryMXBean().getNonHeapMemoryUsage()//堆外内存

5.获取堆栈信息相当于jstack

ManagementFactory.getThreadMXBean().dumpAllThreads(false, false)

ThreadInfo 里有线程的信息

进行垃圾回收监控

Jstat.main(new String[]{"-gcutil", "-h5",pid,"1s"});

如何获取HotSpotDiagnosticMXBean   ？

MBeanServer server = ManagementFactory.getPlatformMBeanServer();  
HotSpotDiagnosticMXBean   hotspotDiagnosticMXBean = newPlatformMXBeanProxy(server, "com.sun.management:type=HotSpotDiagnostic", HotSpotDiagnosticMXBean.class);

//获取young GC 和full GC 次数

 List<GarbageCollectorMXBean> list=ManagementFactory.getGarbageCollectorMXBeans();
for(GarbageCollectorMXBean e:list){
logger.info("name={},count={},time={}",e.getName(),e.getCollectionCount(),e.getCollectionTime());
}