JVM监控：JVM监控指标、JVM监控界面实现、Java监控JVM

淩亂°似流年 2023-06-28 08:45 2阅读 0赞

**本文概要：**

1、监控JVM的哪些指标；

2、一目了然的JVM监控的UI界面；

3、Java代码获取JVM监控状态。

## 1、监控JVM的哪些指标 ##

javaVersion                                        /\*\* Java版本号 \*/  
                runTime                                                /\*\* 程序运行时间(ms) \*/  
                loadedClassCount                            /\*\* JVM当前加载类数量 \*/  
                unloadedClassCount                        /\*\* JVM已卸载类数量 \*/  
                heapTotal                                            /\*\* 堆内存大小(字节) \*/  
                heapUsed                                            /\*\* 堆内存已使用(字节) \*/  
                heapUsedPercent                                /\*\* 堆内存使用率 \*/  
                nonHeapTotal                                    /\*\* 堆外内存大小(字节) \*/  
                nonHeapUsed                                        /\*\* 堆外内存已使用(字节) \*/  
                nonHeapUsedPercent                        /\*\* 堆外内存使用率 \*/  
                edenTotal                                            /\*\* Eden区大小(字节) \*/  
                edenUsed                                            /\*\* Eden区已使用(字节) \*/  
                edenUsedPercent                                /\*\* Eden区使用率 \*/  
                edenPeakUsedPercent                        /\*\* Eden区使用率峰值(从上次采集统计) \*/  
                survivorTotal                                    /\*\* Survivor区大小(字节) \*/  
                survivorUsed                                    /\*\* Survivor区已使用(字节) \*/  
                survivorUsedPercent                        /\*\* Survivor区已使用率 \*/  
                survivorPeakUsedPercent                /\*\* Survivor区已使用率峰值(从上次采集统计) \*/  
                oldTotal                                            /\*\* 老区大小(字节) \*/  
                oldUsed                                                /\*\* 老区已使用(字节) \*/  
                oldUsedPercent                                /\*\* 老区已使用率峰值 \*/  
                oldPeakUsedPercent                        /\*\* 老区已使用率峰值(从上次采集统计) \*/  
                permTotal                                            /\*\* 永久区大小(字节) \*/  
                permUsed                                            /\*\* 永久区已使用(字节) \*/  
                permUsedPercent                                /\*\* 永久区使用率 \*/  
                permPeakUsedPercent                        /\*\* 永久区使用率峰值(从上次采集统计) \*/  
                codeCacheTotal                                /\*\* CodeCache区大小(字节) \*/  
                codeCacheUsed                                    /\*\* CodeCache区已使用(字节) \*/  
                codeCacheUsedPercent                    /\*\* CodeCache区使用率 \*/  
                codeCachePeakUsedPercent            /\*\* CodeCache区使用率峰值(从上次采集统计) \*/  
                ygcName                                                /\*\* young gc名称 \*/  
                ygc                                                        /\*\* young gc次数 \*/  
                ygcTime                                                /\*\* young gc总时间 (ms)\*/  
                fgcName                                                /\*\* full gc名称 \*/  
                fgc                                                        /\*\* full gc次数 \*/  
                fgcTime                                                /\*\* full gc总时间 (ms)\*/  
                threadCount                                        /\*\* JVM当前线程数量 \*/  
                threadPeakCount                                /\*\* JVM线程数量峰值 \*/  
                userThreadCount                                /\*\* JVM当前用户线程数量 \*/  
                deadLockedThreadCount                    /\*\* JVM死锁线程数量 \*/

## 2、一目了然的JVM监控的UI界面 ##

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## 3、Java代码获取JVM监控状态 ##

前面有一篇文章是用Python获取JVM状态数据的[《JVM监控：python脚本JMX获取JVM状态》，这里用Java代码获取JVM状态数据，可以在自己的应用程序里定时运行获取JVM状态数据，测试兼容JDK1.7/1.8。][JVM_python_JMX_JVM_Java_JVM_JVM_JDK1.7_1.8]

package com.tjy.util;
    
    import java.lang.management.GarbageCollectorMXBean;
    import java.lang.management.ManagementFactory;
    import java.util.ArrayList;
    import java.util.List;
    
    /**
     * 类描述：JVM GC信息工具类
     * 
     **/
    public class JVMGCUtils {
    	static private GarbageCollectorMXBean youngGC;
        static private GarbageCollectorMXBean fullGC; 
    
        static{
        	List<GarbageCollectorMXBean> gcMXBeanList = ManagementFactory.getGarbageCollectorMXBeans();        
            for (final GarbageCollectorMXBean gcMXBean : gcMXBeanList) {
    			String gcName = gcMXBean.getName();
    			if(gcName==null) {
    				continue;
    			}
    			//G1 Old Generation
    			//Garbage collection optimized for short pausetimes Old Collector
    			//Garbage collection optimized for throughput Old Collector
    			//Garbage collection optimized for deterministic pausetimes Old Collector
    			//G1 Young Generation
    			//Garbage collection optimized for short pausetimes Young Collector
    			//Garbage collection optimized for throughput Young Collector
    			//Garbage collection optimized for deterministic pausetimes Young Collector
                if (fullGC == null &&
                	(gcName.endsWith("Old Collector")
                	|| "ConcurrentMarkSweep".equals(gcName) 
                    || "MarkSweepCompact".equals(gcName) 
                    || "PS MarkSweep".equals(gcName))
                ) {
                    fullGC = gcMXBean;
                } else if (youngGC == null &&
                		(gcName.endsWith("Young Generation")
                		|| "ParNew".equals(gcName) 
                        || "Copy".equals(gcName) 
                        || "PS Scavenge".equals(gcName)) 
                ) {
                    youngGC = gcMXBean;
                }
            }
        }//static
    
        //YGC名称
        static public String getYoungGCName() {
            return youngGC == null ? "" : youngGC.getName();
        }
        
        //YGC总次数
        static public long getYoungGCCollectionCount() {
            return youngGC == null ? 0 : youngGC.getCollectionCount();
        }
    
        //YGC总时间
        static public long getYoungGCCollectionTime() {
            return youngGC == null ? 0 : youngGC.getCollectionTime();
        }
    
        //FGC名称
        static public String getFullGCName() {
            return fullGC == null ? "" : fullGC.getName();
        }
        
        //FGC总次数
        static public long getFullGCCollectionCount() {
            return fullGC == null ? 0 : fullGC.getCollectionCount();
        }
    
        //FGC总次数
        static public long getFullGCCollectionTime() {
            return fullGC == null ? 0 : fullGC.getCollectionTime();
        }
        
        public static void main(String[] args) {
        	List<List<Long>> listRoot = new ArrayList<List<Long>>();
        	for(;;) {
        		System.out.println("=======================================================================");
    	        System.out.println("getYoungGCName: " + JVMGCUtils.getYoungGCName());
    	        System.out.println("getYoungGCCollectionCount: " + JVMGCUtils.getYoungGCCollectionCount());
    	        System.out.println("getYoungGCCollectionTime: " + JVMGCUtils.getYoungGCCollectionTime());
    	        System.out.println("getFullGCName: " + JVMGCUtils.getFullGCName());
    	        System.out.println("getFullGCCollectionCount: " + JVMGCUtils.getFullGCCollectionCount());
    	        System.out.println("getFullGCCollectionTime: " + JVMGCUtils.getFullGCCollectionTime());
    	        List<Long> list = new ArrayList<Long>(1000);
    	        listRoot.add(list);
    	        try {	        	
    				Thread.sleep(3000);
    			} catch (InterruptedException e) {
    				e.printStackTrace();
    			}
    	        if(list.size() > 1) {
    	        	list.remove(0);
    	        }
    	        Runtime.getRuntime().gc();
        	}
        }
    }

package com.tjy.util;
    
    import java.lang.management.ClassLoadingMXBean;
    import java.lang.management.CompilationMXBean;
    import java.lang.management.ManagementFactory;
    import java.lang.management.RuntimeMXBean;
    import java.util.Properties;
    
    /**
     * 类描述：JVM信息工具类
     * 
     **/
    public class JVMInfoUtils {
        static private RuntimeMXBean runtime = ManagementFactory.getRuntimeMXBean();
        static private ClassLoadingMXBean classLoad = ManagementFactory.getClassLoadingMXBean();
        //可能为null
        static private CompilationMXBean compilation = ManagementFactory.getCompilationMXBean();
        static private Properties properties = System.getProperties();
    
    	/**
    	 * 获取JVM进程PID
    	 * @return
    	 */
    	public static String getPID() {
    		String pid = System.getProperty("pid");
    		if (pid == null) {
    	        String name = runtime.getName();
    	        if(name != null) {
    	        	pid = name.split("@")[0]; 
    	        	System.setProperty("pid", pid);        	                    	
    	        } 	        
    		}
    		return pid;
    	}
    	
        /**
         * 获取JVM规范名称
         * @return
         */
        static public String getJVMSpecName() {
            return runtime.getSpecName();
        }
    
        /**
         * 获取JVM规范运营商
         * @return
         */
        static public String getJVMSpecVendor() {
            return runtime.getSpecVendor();
        }
    
        /**
         * 获取JVM规范版本（如：1.7）
         * @return
         */
        static public String getJVMSpecVersion() {
            return runtime.getSpecVersion();
        }
    
        /**
         * 获取JVM名称
         * @return
         */
        static public String getJVMName() {
            return runtime.getVmName();
        }
    
        /**
         * 获取Java的运行环境版本（如：1.7.0_67）
         * @return
         */
        static public String getJavaVersion() {
            return getSystemProperty("java.version");
        }
        
        /**
         * 获取JVM运营商
         * @return
         */
        static public String getJVMVendor() {
            return runtime.getVmVendor();
        }
    
        /**
         * 获取JVM实现版本（如：25.102-b14）
         * @return
         */
        static public String getJVMVersion() {
            return runtime.getVmVersion();
        }
    
        /**
         * 获取JVM启动时间
         * @return
         */
        static public long getJVMStartTimeMs() {
            return runtime.getStartTime();
        }
    
        /**
         * 获取JVM运行时间
         * @return
         */
        static public long getJVMUpTimeMs() {
            return runtime.getUptime();
        }
    
        /**
         * 获取JVM当前加载类总量
         * @return
         */
        static public long getJVMLoadedClassCount() {
            return classLoad.getLoadedClassCount();
        }
    
        /**
         * 获取JVM已卸载类总量
         * @return
         */
        static public long getJVMUnLoadedClassCount() {
            return classLoad.getUnloadedClassCount();
        }
    
        /**
         * 获取JVM从启动到现在加载类总量
         * @return
         */
        static public long getJVMTotalLoadedClassCount() {
            return classLoad.getTotalLoadedClassCount();
        }
    
        /**
         * 获取JIT编译器名称
         * @return
         */
        static public String getJITName() {
            return null == compilation ? "" : compilation.getName();
        }
    
        /**
         * 获取JIT总编译时间
         * @return
         */
        static public long getJITTimeMs() {
            if (null!=compilation && compilation.isCompilationTimeMonitoringSupported()) {
                return compilation.getTotalCompilationTime();
            }
            return -1;
        }
    
        /**
         * 获取指定key的属性值
         * @param key
         * @return
         */
        static public String getSystemProperty(String key) {
            return properties.getProperty(key);
        }
    
        static public Properties getSystemProperty() {
            return properties;
        }
    }

package com.tjy.util;
    
    import java.lang.management.ManagementFactory;
    import java.lang.management.MemoryMXBean;
    import java.lang.management.MemoryPoolMXBean;
    import java.lang.management.MemoryUsage;
    import java.util.ArrayList;
    import java.util.List;
    
    /**
     * 类描述：JVM内存信息工具类
     * 
     **/
    public class JVMMemoryUtils {
        static private MemoryMXBean memoryMXBean;
        static private MemoryPoolMXBean edenSpaceMxBean;
        static private MemoryPoolMXBean survivorSpaceMxBean;
        static private MemoryPoolMXBean oldGenMxBean;
        static private MemoryPoolMXBean permGenMxBean;
        static private MemoryPoolMXBean codeCacheMxBean;
        
    	/**
    	 * JVM内存区域使用情况。</br>
    	 * <pre>
    	 * init：初始内存大小（字节）
    	 * used：当前使用内存大小（字节）
    	 * committed：已经申请分配的内存大小（字节）
    	 * max：最大内存大小（字节）
    	 * usedPercent：已经申请分配内存与最大内存大小的百分比
    	 * </pre>
    	 * @author tangjiyu
    	 */
    	static public class JVMMemoryUsage {
    		//初始内存大小（字节）
    	    private long init;
    	    //当前使用内存大小（字节）
    	    private long used;
    	    //已经申请分配的内存大小（字节）
    	    private long committed;
    	    //最大内存大小（字节）
    	    private long max;
    	    //已经申请分配内存与最大内存大小的百分比
    	    private float usedPercent;
    	    
    	    public JVMMemoryUsage(MemoryUsage memoryUsage) {
    	    	this.setMemoryUsage(memoryUsage);
    	    	//this(memoryUsage.getInit(), memoryUsage.getUsed(), memoryUsage.getCommitted(), memoryUsage.getMax());
    		}
    	    
    		public JVMMemoryUsage(long init, long used, long committed, long max) {
    			super();			
    			this.setMemoryUsage(init, used, committed, max);
    		}
    		
    		private void setMemoryUsage(MemoryUsage memoryUsage) {
    	    	if(memoryUsage!=null) {
    	    		this.setMemoryUsage(memoryUsage.getInit(), memoryUsage.getUsed(), memoryUsage.getCommitted(), memoryUsage.getMax());
    	    	} else {
    	    		this.setMemoryUsage(0, 0, 0, 0);
    	    	}
    		}
    		
    		private void setMemoryUsage(long init, long used, long committed, long max) {
    			this.init = init;
    			this.used = used;		
    			this.committed = committed;		
    			this.max = max;
    			if(this.used>0 && max>0) {
    				this.usedPercent = used * Float.valueOf("1.0") / max;
    			} else {
    				this.usedPercent = 0;
    			}
    		}
    		
    		public long getInit() {
    			return init;
    		}
    		public long getUsed() {
    			return used;
    		}
    		public long getCommitted() {
    			return committed;
    		}
    		public long getMax() {
    			return max;
    		}
    		public float getUsedPercent() {
    			return usedPercent;
    		}
    		
    		@Override
    		public String toString() {
    			StringBuffer buf = new StringBuffer();
    		    buf.append("init = " + init + "(" + (init >> 10) + "K) ");
    		    buf.append("used = " + used + "(" + (used >> 10) + "K) ");
    		    buf.append("committed = " + committed + "(" +
    		               (committed >> 10) + "K) " );
    		    buf.append("max = " + max + "(" + (max >> 10) + "K)");
    		    buf.append("usedPercent = " + usedPercent);
    		    return buf.toString();
    		}	
    	}
    	
        static {
            memoryMXBean = ManagementFactory.getMemoryMXBean();
            
            List<MemoryPoolMXBean> memoryPoolMXBeanList = ManagementFactory.getMemoryPoolMXBeans();        
            for (final MemoryPoolMXBean memoryPoolMXBean : memoryPoolMXBeanList) {
    			String poolName = memoryPoolMXBean.getName();
    			if(poolName==null) {
    				continue;
    			}
    			// 官方JVM(HotSpot)提供的MemoryPoolMXBean
    			// JDK1.7/1.8 Eden区内存池名称： "Eden Space" 或  "PS Eden Space"、 “G1 Eden Space”(和垃圾收集器有关)
    			// JDK1.7/1.8 Survivor区内存池名称："Survivor Space" 或 "PS Survivor Space"、“G1 Survivor Space”(和垃圾收集器有关)
    			// JDK1.7  老区内存池名称： "Tenured Gen" 
    			// JDK1.8  老区内存池名称："Old Gen" 或 "PS Old Gen"、“G1 Old Gen”(和垃圾收集器有关)
    			// JDK1.7  方法/永久区内存池名称： "Perm Gen" 或 "PS Perm Gen"(和垃圾收集器有关)
    			// JDK1.8  方法/永久区内存池名称："Metaspace"(注意：不在堆内存中)
    			// JDK1.7/1.8  CodeCache区内存池名称： "Code Cache" 
    			if (edenSpaceMxBean==null && poolName.endsWith("Eden Space")) {
    				edenSpaceMxBean = memoryPoolMXBean;
    			} else if (survivorSpaceMxBean==null && poolName.endsWith("Survivor Space")) {
    				survivorSpaceMxBean = memoryPoolMXBean;
    			} else if (oldGenMxBean==null && (poolName.endsWith("Tenured Gen") || poolName.endsWith("Old Gen"))) {
    				oldGenMxBean = memoryPoolMXBean;
    			} else if (permGenMxBean==null && (poolName.endsWith("Perm Gen") || poolName.endsWith("Metaspace"))) {
    				permGenMxBean = memoryPoolMXBean;
    			}  else if (codeCacheMxBean==null && poolName.endsWith("Code Cache")) {
    				codeCacheMxBean = memoryPoolMXBean;
    			} 
    		}
        }// static
    
    	
        /**
         * 获取堆内存情况
         * @return 不能获取到返回null
         */
        static public JVMMemoryUsage getHeapMemoryUsage() {
        	if(memoryMXBean!=null) {
        		final MemoryUsage usage =memoryMXBean.getHeapMemoryUsage();
        		if(usage!=null) {
        			return new JVMMemoryUsage(usage);
        		}
        	}
            return null;
        }
    
        /**
         * 获取堆外内存情况
         * @return 不能获取到返回null
         */
        static public JVMMemoryUsage getNonHeapMemoryUsage() {
        	if(memoryMXBean!=null) {
        		final MemoryUsage usage =memoryMXBean.getNonHeapMemoryUsage();
        		if(usage!=null) {
        			return new JVMMemoryUsage(usage);
        		}
        	}
            return null;
        }
        
        /**
         * 获取Eden区内存情况
         * @return 不能获取到返回null
         */
        static public JVMMemoryUsage getEdenSpaceMemoryUsage() {
        	return getMemoryPoolUsage(edenSpaceMxBean);
        }
        
        /**
         * 获取Eden区内存峰值（从启动或上一次重置开始统计），并重置
         * @return 不能获取到返回null
         */
        static public JVMMemoryUsage getAndResetEdenSpaceMemoryPeakUsage() {
        	return getAndResetMemoryPoolPeakUsage(edenSpaceMxBean);
        }
         
        /**
         * 获取Survivor区内存情况
         * @return 不能获取到返回null
         */
        static public JVMMemoryUsage getSurvivorSpaceMemoryUsage() {
        	return getMemoryPoolUsage(survivorSpaceMxBean);
        }
        
        /**
         * 获取Survivor区内存峰值（从启动或上一次重置开始统计），并重置
         * @return 不能获取到返回null
         */
        static public JVMMemoryUsage getAndResetSurvivorSpaceMemoryPeakUsage() {
        	return getAndResetMemoryPoolPeakUsage(survivorSpaceMxBean);
        }
        
        /**
         * 获取老区内存情况
         * @return 不能获取到返回null
         */
        static public JVMMemoryUsage getOldGenMemoryUsage() {
        	return getMemoryPoolUsage(oldGenMxBean);
        }
        
        /**
         * 获取老区内存峰值（从启动或上一次重置开始统计），并重置
         * @return 不能获取到返回null
         */
        static public JVMMemoryUsage getAndResetOldGenMemoryPeakUsage() {
        	return getAndResetMemoryPoolPeakUsage(oldGenMxBean);
        }
        
        /**
         * 获取永久区/方法区内存情况
         * @return 不能获取到返回null
         */
        static public JVMMemoryUsage getPermGenMemoryUsage() {
        	return getMemoryPoolUsage(permGenMxBean);
        }
    
        /**
         * 获取永久区/方法区内存峰值（从启动或上一次重置开始统计），并重置
         * @return 不能获取到返回null
         */
        static public JVMMemoryUsage getAndResetPermGenMemoryPeakUsage() {
        	return getAndResetMemoryPoolPeakUsage(permGenMxBean);
        }
        
        /**
         * 获取CodeCache区内存情况
         * @return 不能获取到返回null
         */
        static public JVMMemoryUsage getCodeCacheMemoryUsage() {
        	return getMemoryPoolUsage(codeCacheMxBean);
        }
        
        /**
         * 获取CodeCache区内存峰值（从启动或上一次重置开始统计），并重置
         * @return 不能获取到返回null
         */
        static public JVMMemoryUsage getAndResetCodeCacheMemoryPeakUsage() {
        	return getAndResetMemoryPoolPeakUsage(codeCacheMxBean);
        }
       
        static private JVMMemoryUsage getMemoryPoolUsage(MemoryPoolMXBean memoryPoolMXBean) {
        	if(memoryPoolMXBean!=null) {
    			final MemoryUsage usage = memoryPoolMXBean.getUsage();
    			if(usage!=null) {
    				return new JVMMemoryUsage(usage);
    			}
        	}
    		return null;
    	}
        
        static private JVMMemoryUsage getAndResetMemoryPoolPeakUsage(MemoryPoolMXBean memoryPoolMXBean) {
        	if(memoryPoolMXBean!=null) {
    			final MemoryUsage usage = memoryPoolMXBean.getPeakUsage();
    			if(usage!=null) {
    				memoryPoolMXBean.resetPeakUsage();
    				return new JVMMemoryUsage(usage);
    			}
        	}
    		return null;
    	}
    
        public static void main(String[] args) {
        	List<List<Long>> listRoot = new ArrayList<List<Long>>();
        	for(;;) {
        		System.out.println("=======================================================================");
    	        System.out.println("getHeapMemoryUsage: " + JVMMemoryUtils.getHeapMemoryUsage());
    	        System.out.println("getNonHeapMemoryUsage: " + JVMMemoryUtils.getNonHeapMemoryUsage());
    	        System.out.println("getEdenSpaceMemoryUsage: " + JVMMemoryUtils.getEdenSpaceMemoryUsage());
    	        System.out.println("getAndResetEdenSpaceMemoryPeakUsage: " + JVMMemoryUtils.getAndResetEdenSpaceMemoryPeakUsage());
    	        System.out.println("getSurvivorSpaceMemoryUsage: " + JVMMemoryUtils.getSurvivorSpaceMemoryUsage());
    	        System.out.println("getAndResetSurvivorSpaceMemoryPeakUsage: " + JVMMemoryUtils.getAndResetSurvivorSpaceMemoryPeakUsage());
    	        System.out.println("getOldGenMemoryUsage: " + JVMMemoryUtils.getOldGenMemoryUsage());
    	        System.out.println("getAndResetOldGenMemoryPeakUsage: " + JVMMemoryUtils.getAndResetOldGenMemoryPeakUsage());
    	        System.out.println("getPermGenMemoryUsage: " + JVMMemoryUtils.getPermGenMemoryUsage());
    	        System.out.println("getAndResetPermGenMemoryPeakUsage: " + JVMMemoryUtils.getAndResetPermGenMemoryPeakUsage());
    	        System.out.println("getCodeCacheMemoryUsage: " + JVMMemoryUtils.getCodeCacheMemoryUsage());
    	        System.out.println("getAndResetCodeCacheMemoryPeakUsage: " + JVMMemoryUtils.getAndResetCodeCacheMemoryPeakUsage());
    	        List<Long> list = new ArrayList<Long>(10000);
    	        listRoot.add(list);
    	        try {	        	
    				Thread.sleep(3000);
    			} catch (InterruptedException e) {
    				e.printStackTrace();
    			}
    	        
    	        if(list.size() > 1) {
    	        	list.remove(0);
    	        }
    	        Runtime.getRuntime().gc();
        	}
        }
    }

package com.tjy.util;
    
    import java.lang.management.ManagementFactory;
    import java.lang.management.ThreadMXBean;
    
    /**
     * 类描述：JVM 线程信息工具类
     * 
     **/
    public class JVMThreadUtils {
        static private ThreadMXBean threadMXBean;
    
        static {
            threadMXBean = ManagementFactory.getThreadMXBean();
        }
    
        /**
         * Daemon线程总量
         * @return
         */
        static public int getDaemonThreadCount() {
            return threadMXBean.getDaemonThreadCount();
        }
    
        /**
         * 当前线程总量
         * @return
         */
        static public int getThreadCount() {
            return threadMXBean.getThreadCount();
        }
        
        /**
         * 获取线程数量峰值（从启动或resetPeakThreadCount()方法重置开始统计）
         * @return
         */
        static public int getPeakThreadCount() {
            return threadMXBean.getPeakThreadCount();
        }
        
        /**
         * 获取线程数量峰值（从启动或resetPeakThreadCount()方法重置开始统计），并重置
         * @return
         * @Throws java.lang.SecurityException - if a security manager exists and the caller does not have ManagementPermission("control").
         */
        static public int getAndResetPeakThreadCount() {
        	int count = threadMXBean.getPeakThreadCount();
        	resetPeakThreadCount();
            return count;
        }
        
        /**
         * 重置线程数量峰值
         * @Throws java.lang.SecurityException - if a security manager exists and the caller does not have ManagementPermission("control").
         */
        static public void resetPeakThreadCount() {
            threadMXBean.resetPeakThreadCount();
        }
        
        /**
         * 死锁线程总量
         * @return
         * @Throws IllegalStateException 没有权限或JVM不支持的操作
         */
        static public int getDeadLockedThreadCount() {
            try {
                long[] deadLockedThreadIds = threadMXBean.findDeadlockedThreads();
                if (deadLockedThreadIds == null) {
                    return 0;
                }
                return deadLockedThreadIds.length;
            } catch (Exception e) {
                throw new IllegalStateException(e.getMessage(), e);
            }
        }
        
        public static void main(String[] args) {
        	for(;;) {
        		System.out.println("=======================================================================");
    	        System.out.println("getDaemonThreadCount: " + JVMThreadUtils.getDaemonThreadCount());
    	        System.out.println("getNonHeapMemoryUsage: " + JVMThreadUtils.getThreadCount());
    	        System.out.println("getPeakThreadCountAndReset: " + JVMThreadUtils.getAndResetPeakThreadCount());
    	        System.out.println("getDeadLockedThreadCount: " + JVMThreadUtils.getDeadLockedThreadCount());
    	        try {	        	
    				Thread.sleep(5000);
    			} catch (InterruptedException e) {
    				e.printStackTrace();
    			}
        	}
        }
    }

package com.tjy.task.impl.app;
    
    import java.util.ArrayList;
    import java.util.List;
    import java.util.Map;
    import java.util.Map.Entry;
    
    import com.tjy.util.JVMGCUtils;
    import com.tjy.util.JVMInfoUtils;
    import com.tjy.util.JVMMemoryUtils;
    import com.tjy.util.JVMMemoryUtils.JVMMemoryUsage;
    import com.tjy.util.JVMThreadUtils;
    
    /**
     * 
     * 应用状态监控,包括应用类型,版本,所在的tomcat名以及数据库连接等信息(代码有删减)
     * 
     * 
     */
    public class ApplicationMonitorTask extends AbstractMonitorTask<ApplicationMonitorMessage> {
    
    	@Override
    	protected ApplicationMonitorMessage doRun() {
    		return this.createMessage();
    	}
    
    	private ApplicationMonitorMessage createMessage() {
    		ApplicationMonitorMessage message = new ApplicationMonitorMessage();
    		// APP
    		message.setVersion(ErlangMonitorConfigManager.getConfig().getAppVersion());
    		// JVM
    		setJVMInfo(message);
    		// DB
    		setDBInfo(message);
    		return message;
    	}
    
    	private void setJVMInfo(ApplicationMonitorMessage message) {
    		try {
    			message.setPid(Integer.parseInt(JVMInfoUtils.getPID()));
    		} catch (Exception e) {
    		}
    		message.setJavaVersion(JVMInfoUtils.getJavaVersion());
    		message.setRunTime(JVMInfoUtils.getJVMUpTimeMs());
    		message.setLoadedClassCount(JVMInfoUtils.getJVMLoadedClassCount());
    		message.setUnloadedClassCount(JVMInfoUtils.getJVMUnLoadedClassCount());
    		JVMMemoryUsage heapMemoryUsage = JVMMemoryUtils.getHeapMemoryUsage();
    		if (heapMemoryUsage != null) {
    			message.setHeapTotal(heapMemoryUsage.getMax());
    			message.setHeapUsed(heapMemoryUsage.getUsed());
    			message.setHeapUsedPercent(heapMemoryUsage.getUsedPercent());
    		}
    		JVMMemoryUsage nonHeapMemoryUsage = JVMMemoryUtils.getNonHeapMemoryUsage();
    		if (nonHeapMemoryUsage != null) {
    			message.setNonHeapTotal(nonHeapMemoryUsage.getMax());
    			message.setNonHeapUsed(nonHeapMemoryUsage.getUsed());
    			message.setNonHeapUsedPercent(nonHeapMemoryUsage.getUsedPercent());
    		}
    		JVMMemoryUsage edenMemoryUsage = JVMMemoryUtils.getEdenSpaceMemoryUsage();
    		if (edenMemoryUsage != null) {
    			message.setEdenTotal(edenMemoryUsage.getMax());
    			message.setEdenUsed(edenMemoryUsage.getUsed());
    			message.setEdenUsedPercent(edenMemoryUsage.getUsedPercent());
    		}
    		JVMMemoryUsage edenPeakMemoryUsage = JVMMemoryUtils.getAndResetEdenSpaceMemoryPeakUsage();
    		if (edenPeakMemoryUsage != null) {
    			message.setEdenPeakUsedPercent(edenPeakMemoryUsage.getUsedPercent());
    		}
    		JVMMemoryUsage survivorMemoryUsage = JVMMemoryUtils.getSurvivorSpaceMemoryUsage();
    		if (survivorMemoryUsage != null) {
    			message.setSurvivorTotal(survivorMemoryUsage.getMax());
    			message.setSurvivorUsed(survivorMemoryUsage.getUsed());
    			message.setSurvivorUsedPercent(survivorMemoryUsage.getUsedPercent());
    		}
    		JVMMemoryUsage survivorPeakMemoryUsage = JVMMemoryUtils.getAndResetSurvivorSpaceMemoryPeakUsage();
    		if (survivorPeakMemoryUsage != null) {
    			message.setSurvivorPeakUsedPercent(survivorPeakMemoryUsage.getUsedPercent());
    		}
    		JVMMemoryUsage oldGenMemoryUsage = JVMMemoryUtils.getOldGenMemoryUsage();
    		if (oldGenMemoryUsage != null) {
    			message.setOldTotal(oldGenMemoryUsage.getMax());
    			message.setOldUsed(oldGenMemoryUsage.getUsed());
    			message.setOldUsedPercent(oldGenMemoryUsage.getUsedPercent());
    		}
    		JVMMemoryUsage oldGenPeakMemoryUsage = JVMMemoryUtils.getAndResetOldGenMemoryPeakUsage();
    		if (oldGenPeakMemoryUsage != null) {
    			message.setOldPeakUsedPercent(oldGenPeakMemoryUsage.getUsedPercent());
    		}
    		JVMMemoryUsage permGenMemoryUsage = JVMMemoryUtils.getPermGenMemoryUsage();
    		if (permGenMemoryUsage != null) {
    			message.setPermTotal(permGenMemoryUsage.getMax());
    			message.setPermUsed(permGenMemoryUsage.getUsed());
    			message.setPermUsedPercent(permGenMemoryUsage.getUsedPercent());
    		}
    		JVMMemoryUsage permGenPeakMemoryUsage = JVMMemoryUtils.getAndResetPermGenMemoryPeakUsage();
    		if (permGenPeakMemoryUsage != null) {
    			message.setPermPeakUsedPercent(permGenPeakMemoryUsage.getUsedPercent());
    		}
    		JVMMemoryUsage codeCacheGenMemoryUsage = JVMMemoryUtils.getCodeCacheMemoryUsage();
    		if (codeCacheGenMemoryUsage != null) {
    			message.setCodeCacheTotal(codeCacheGenMemoryUsage.getMax());
    			message.setCodeCacheUsed(codeCacheGenMemoryUsage.getUsed());
    			message.setCodeCacheUsedPercent(codeCacheGenMemoryUsage.getUsedPercent());
    		}
    		JVMMemoryUsage codeCacheGenPeakMemoryUsage = JVMMemoryUtils.getAndResetCodeCacheMemoryPeakUsage();
    		if (codeCacheGenPeakMemoryUsage != null) {
    			message.setCodeCachePeakUsedPercent(codeCacheGenPeakMemoryUsage.getUsedPercent());
    		}
    
    		message.setYgcName(JVMGCUtils.getYoungGCName());
    		message.setYgc(JVMGCUtils.getYoungGCCollectionCount());
    		message.setYgcTime(JVMGCUtils.getYoungGCCollectionTime());
    		message.setFgcName(JVMGCUtils.getFullGCName());
    		message.setFgc(JVMGCUtils.getFullGCCollectionCount());
    		message.setFgcTime(JVMGCUtils.getFullGCCollectionTime());
    
    		message.setThreadCount(JVMThreadUtils.getThreadCount());
    		message.setThreadPeakCount(JVMThreadUtils.getAndResetPeakThreadCount());
    		message.setUserThreadCount(message.getThreadCount() - JVMThreadUtils.getDaemonThreadCount());
    		message.setDeadLockedThreadCount(JVMThreadUtils.getDeadLockedThreadCount());
    	}
    
    }

【参考文档】

[          《JVM监控》][_JVM]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3RqaXl1_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20200108112907376.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3RqaXl1,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3RqaXl1_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/20200108113121336.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3RqaXl1,size_16,color_FFFFFF,t_70
[JVM_python_JMX_JVM_Java_JVM_JVM_JDK1.7_1.8]: https://blog.csdn.net/tjiyu/article/details/100778018
[_JVM]: https://blog.csdn.net/yangguosb/article/details/78327830