package com.test; import java.lang.management.ManagementFactory; import java.lang.management.RuntimeMXBean; public class Target { public static void main(String[] args) throws InterruptedException { System.out.println(getProcessID()); while(true) { Thread.sleep(10000); } } public static final int getProcessID() { RuntimeMXBean runtimeMXBean = ManagementFactory.getRuntimeMXBean(); System.out.println(runtimeMXBean.getName()); return Integer.valueOf(runtimeMXBean.getName().split("@")[0]) .intValue(); } }
ManagementFactory是一個在運行時管理和監控Java VM的工廠類,它能提供不少管理VM的靜態接口,好比 RuntimeMXBean;
RuntimeMXBean是Java虛擬機的運行時管理接口.
package com.test; import java.util.HashSet; import java.util.Set; import sun.jvmstat.monitor.MonitoredHost; import sun.jvmstat.monitor.MonitoredVm; import sun.jvmstat.monitor.MonitoredVmUtil; import sun.jvmstat.monitor.VmIdentifier; public class ProcessID { public static void main(String[] args) throws Exception { // 獲取監控主機 MonitoredHost local = MonitoredHost.getMonitoredHost("localhost"); // 取得全部在活動的虛擬機集合 Set<?> vmlist = new HashSet<Object>(local.activeVms()); // 遍歷集合,輸出PID和進程名 for(Object process : vmlist) { MonitoredVm vm = local.getMonitoredVm(new VmIdentifier("//" + process)); // 獲取類名 String processname = MonitoredVmUtil.mainClass(vm, true); System.out.println(process + " ------> " + processname); } } }
MonitoredHost等類位於${JAVA_HOME}/lib/tools.jar
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運行結果:html
2752 ------> 5172 ------> com.test.Target 5308 ------> com.test.ProcessID
package com.test; import java.net.URISyntaxException; import java.util.HashSet; import java.util.Set; import sun.jvmstat.monitor.MonitorException; import sun.jvmstat.monitor.MonitoredHost; import sun.jvmstat.monitor.MonitoredVm; import sun.jvmstat.monitor.MonitoredVmUtil; import sun.jvmstat.monitor.VmIdentifier; public class ProcessID { public static void main(String[] args) throws Exception { int pid = getProcess(Target.class); System.out.println("PID: "+pid); } public static int getProcess(Class<?> cls) throws MonitorException, URISyntaxException { if(cls == null) { return -1; } // 獲取監控主機 MonitoredHost local = MonitoredHost.getMonitoredHost("localhost"); // 取得全部在活動的虛擬機集合 Set<?> vmlist = new HashSet<Object>(local.activeVms()); // 遍歷集合,輸出PID和進程名 for(Object process : vmlist) { MonitoredVm vm = local.getMonitoredVm(new VmIdentifier("//" + process)); // 獲取類名 String processname = MonitoredVmUtil.mainClass(vm, true); if(cls.getName().equals(processname)) { return ((Integer)process).intValue(); } } return -1; } }
package com.example.demo; import sun.jvmstat.monitor.*; import java.net.URISyntaxException; import java.util.HashSet; import java.util.Set; public class ProcessID2 { public static void main(String[] args) throws Exception { int pid = getProcess("cn.usr.demo.DemoApplication"); System.out.println("PID: " + pid); } public static int getProcess(String cls) throws MonitorException, URISyntaxException { if (cls == null) { return -1; } // 獲取監控主機 MonitoredHost local = MonitoredHost.getMonitoredHost("localhost"); // 取得全部在活動的虛擬機集合 Set<?> vmlist = new HashSet<Object>(local.activeVms()); // 遍歷集合,輸出PID和進程名 for (Object process : vmlist) { MonitoredVm vm = local.getMonitoredVm(new VmIdentifier("//" + process)); // 獲取類名 String processname = MonitoredVmUtil.mainClass(vm, true); if (cls.equals(processname)) { return ((Integer) process).intValue(); } } return -1; } }