# 常用JMX 操作系统信息 ```java // 1. 操作系统信息 OperatingSystemMXBean operatingSystemMXBean = ManagementFactory.getOperatingSystemMXBean(); // Map result = new HashMap<>(); result.put("operatingSystemMXBean", operatingSystemMXBean); ``` 得到的信息类似于: ```json { "operatingSystemMXBean":{ "arch":"x86_64", "availableProcessors":8, "committedVirtualMemorySize":10764525568, "freePhysicalMemorySize":162242560, "freeSwapSpaceSize":0, "maxFileDescriptorCount":10240, "name":"Mac OS X", "objectName":{ "canonicalKeyPropertyListString":"type=OperatingSystem", "domain":"java.lang", "domainPattern":false, "keyPropertyList":{ "type":"OperatingSystem" }, "keyPropertyListString":"type=OperatingSystem", "pattern":false, "propertyListPattern":false, "propertyPattern":false, "propertyValuePattern":false }, "openFileDescriptorCount":701, "processCpuLoad":0.013444809299587156, "processCpuTime":231834833000, "systemCpuLoad":0.06417112299465241, "systemLoadAverage":2.6044921875, "totalPhysicalMemorySize":17179869184, "totalSwapSpaceSize":0, "version":"10.14.5" } } ``` 运行时信息: ```java // 1.2 运行时 RuntimeMXBean runtimeMXBean = ManagementFactory.getRuntimeMXBean(); // Map result = new HashMap<>(); result.put("runtimeMXBean", runtimeMXBean); ``` 结果: ```json { "runtimeMXBean":{ "bootClassPath":"......", "bootClassPathSupported":true, "classPath":".....", "inputArguments":[ "-XX:+UseG1GC", "-XX:MaxGCPauseMillis=200", "-verbose:gc", "-XX:+PrintGCDateStamps", "-XX:+PrintGCDetails", "-Xloggc:gc.log", "-XX:+PrintClassHistogram", "-XX:+HeapDumpOnOutOfMemoryError", "-XX:HeapDumpPath=xxx.hprof", "-Dfile.encoding=UTF-8" ], "libraryPath":"/Java/Extensions:/usr/lib/java:.", "managementSpecVersion":"1.2", "name":"20516@local", "objectName":{ "canonicalKeyPropertyListString":"type=Runtime", "domain":"java.lang", "domainPattern":false, "keyPropertyList":{ "type":"Runtime" }, "keyPropertyListString":"type=Runtime", "pattern":false, "propertyListPattern":false, "propertyPattern":false, "propertyValuePattern":false }, "specName":"Java Virtual Machine Specification", "specVendor":"Oracle Corporation", "specVersion":"1.8", "startTime":1562205244112, "systemProperties":{ "file.encoding":"UTF-8", "java.version":"1.8.0_162", "java.vm.info":"mixed mode", "java.class.version":"52.0" }, "uptime":26754056, "vmName":"Java HotSpot(TM) 64-Bit Server VM", "vmVendor":"Oracle Corporation", "vmVersion":"25.162-b12" } } ``` 内存信息: ```java // 2.1 JVM内存信息 MemoryMXBean memoryMXBean = ManagementFactory.getMemoryMXBean(); // Map result = new HashMap<>(); result.put("memoryMXBean", memoryMXBean); ``` 结果 ： ```json { "memoryMXBean":{ "heapMemoryUsage":{ "committed":268435456, "init":268435456, "max":4294967296, "used":176522232 }, "nonHeapMemoryUsage":{ "committed":130220032, "init":2555904, "max":-1, "used":127471384 }, "notificationInfo":[{ "description":"Memory Notification", "name":"javax.management.Notification", "notifTypes":["java.management.memory.threshold.exceeded","java.management.memory.collection.threshold.exceeded"] }], "objectName":{ "canonicalKeyPropertyListString":"type=Memory", "domain":"java.lang", "domainPattern":false, "keyPropertyList":{ "type":"Memory" }, "keyPropertyListString":"type=Memory", "pattern":false, "propertyListPattern":false, "propertyPattern":false, "propertyValuePattern":false }, "objectPendingFinalizationCount":0, "verbose":true } } ``` JVM内存池-列表 ```java // 2.2 JVM内存池-列表 List memoryPoolMXBeans = ManagementFactory.getMemoryPoolMXBeans(); // Map result = new HashMap<>(); result.put("memoryPoolMXBeans", memoryPoolMXBeans); ``` 结果: ``` // 报错 ``` 线程信息: ```java // 线程 ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean(); // Map result = new HashMap<>(); result.put("threadMXBean", threadMXBean); ``` 结果: ```json { "threadMXBean":{ "allThreadIds":[454,453,450,5,3,2], "currentThreadCpuTime":364689000, "currentThreadCpuTimeSupported":true, "currentThreadUserTime":333704000, "daemonThreadCount":37, "objectMonitorUsageSupported":true, "objectName":{ "canonicalKeyPropertyListString":"type=Threading", "domain":"java.lang", "domainPattern":false, "keyPropertyList":{ "type":"Threading" }, "keyPropertyListString":"type=Threading", "pattern":false, "propertyListPattern":false, "propertyPattern":false, "propertyValuePattern":false }, "peakThreadCount":129, "synchronizerUsageSupported":true, "threadAllocatedMemoryEnabled":true, "threadAllocatedMemorySupported":true, "threadContentionMonitoringEnabled":false, "threadContentionMonitoringSupported":true, "threadCount":126, "threadCpuTimeEnabled":true, "threadCpuTimeSupported":true, "totalStartedThreadCount":441 } } ``` GC ```java // GC List garbageCollectorMXBeans = ManagementFactory.getGarbageCollectorMXBeans(); // Map result = new HashMap<>(); result.put("garbageCollectorMXBeans", garbageCollectorMXBeans); ``` 结果 ```json { "garbageCollectorMXBeans":[ { "collectionCount":47, "collectionTime":733, "lastGcInfo":{ "compositeType":{ "className":"javax.management.openmbean.CompositeData", "description":"CompositeType for GC info for G1 Young Generation", "typeName":"sun.management.G1 Young Generation.GcInfoCompositeType" }, "duration":11, "endTime":1866402, "id":47, "memoryUsageAfterGc":{ "G1 Survivor Space":{ "committed":8388608, "init":0, "max":-1, "used":8388608 }, "Compressed Class Space":{ "committed":9568256, "init":0, "max":1073741824, "used":9130760 }, "Metaspace":{ "committed":80084992, "init":0, "max":-1, "used":78314000 }, "G1 Old Gen":{ "committed":139460608, "init":241172480, "max":4294967296, "used":109514232 }, "G1 Eden Space":{ "committed":120586240, "init":27262976, "max":-1, "used":0 }, "Code Cache":{ "committed":41091072, "init":2555904, "max":251658240, "used":40781632 } }, "memoryUsageBeforeGc":{ "G1 Survivor Space":{ "committed":7340032, "init":0, "max":-1, "used":7340032 }, "Compressed Class Space":{ "committed":9568256, "init":0, "max":1073741824, "used":9130760 }, "Metaspace":{ "committed":80084992, "init":0, "max":-1, "used":78314000 }, "G1 Old Gen":{ "committed":138412032, "init":241172480, "max":4294967296, "used":109065208 }, "G1 Eden Space":{ "committed":122683392, "init":27262976, "max":-1, "used":116391936 }, "Code Cache":{ "committed":41091072, "init":2555904, "max":251658240, "used":40781632 } }, "startTime":1866391 }, "memoryPoolNames":["G1 Eden Space","G1 Survivor Space"], "name":"G1 Young Generation", "notificationInfo":[{ "description":"GC Notification", "name":"javax.management.Notification", "notifTypes":["com.sun.management.gc.notification"] }], "objectName":{ "canonicalKeyPropertyListString":"name=G1 Young Generation,type=GarbageCollector", "domain":"java.lang", "domainPattern":false, "keyPropertyList":{ "name":"G1 Young Generation", "type":"GarbageCollector" }, "keyPropertyListString":"type=GarbageCollector,name=G1 Young Generation", "pattern":false, "propertyListPattern":false, "propertyPattern":false, "propertyValuePattern":false }, "valid":true }, { "collectionCount":0, "collectionTime":0, "lastGcInfo":null, "memoryPoolNames":["G1 Eden Space","G1 Survivor Space","G1 Old Gen"], "name":"G1 Old Generation", "notificationInfo":[{ "description":"GC Notification", "name":"javax.management.Notification", "notifTypes":["com.sun.management.gc.notification"] }], "objectName":{ "canonicalKeyPropertyListString":"name=G1 Old Generation,type=GarbageCollector", "domain":"java.lang", "domainPattern":false, "keyPropertyList":{ "name":"G1 Old Generation", "type":"GarbageCollector" }, "keyPropertyListString":"type=GarbageCollector,name=G1 Old Generation", "pattern":false, "propertyListPattern":false, "propertyPattern":false, "propertyValuePattern":false }, "valid":true } ] } ``` ### whole-code ```java // @RequestMapping("/jmx.json") public Object jmxInfo(HttpServletRequest request) { // Map result = new HashMap<>(); // 1. 操作系统信息 OperatingSystemMXBean operatingSystemMXBean = ManagementFactory.getOperatingSystemMXBean(); // 1.2 运行时 RuntimeMXBean runtimeMXBean = ManagementFactory.getRuntimeMXBean(); // 2.1 JVM内存信息 MemoryMXBean memoryMXBean = ManagementFactory.getMemoryMXBean(); // 2.2 JVM内存池-列表 List memoryPoolMXBeans = ManagementFactory.getMemoryPoolMXBeans(); // 2.3 内存管理器-列表 List memoryManagerMXBeans = ManagementFactory.getMemoryManagerMXBeans(); // 3. class加载统计信息 ClassLoadingMXBean classLoadingMXBean = ManagementFactory.getClassLoadingMXBean(); // 4. 编译统计信息 CompilationMXBean compilationMXBean = ManagementFactory.getCompilationMXBean(); // 线程 ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean(); // GC List garbageCollectorMXBeans = ManagementFactory.getGarbageCollectorMXBeans(); // //result.put("operatingSystemMXBean", operatingSystemMXBean); //result.put("runtimeMXBean", runtimeMXBean); // //result.put("memoryMXBean", memoryMXBean); //result.put("memoryPoolMXBeans", memoryPoolMXBeans); //result.put("memoryManagerMXBeans", memoryManagerMXBeans); // //result.put("classLoadingMXBean", classLoadingMXBean); // //result.put("compilationMXBean", compilationMXBean); // result.put("threadMXBean", threadMXBean); //result.put("garbageCollectorMXBeans", garbageCollectorMXBeans); // return result; } ```