Java 编程查看cpu信息、服务器信息、操作系统信息、jvm 信息

文章目录

Java想要实现跨平台查看服务器信息，可以使用 OSHI 开源 jar 包实现

引入依赖

<dependency> <groupId>com.github.oshi</groupId> <artifactId>oshi-core</artifactId> <version>3.12.2</version> </dependency> 

获取 cpu 信息

 /**
     * 获取 cpu 信息
     */ private static void getCpuInfo() { System.err.println("===============cpu信息begin==============="); SystemInfo systemInfo = new SystemInfo(); CentralProcessor processor = systemInfo.getHardware().getProcessor(); long[] prevTicks = processor.getSystemCpuLoadTicks(); try { // 睡眠 1s TimeUnit.SECONDS.sleep(1); } catch (InterruptedException e) { e.printStackTrace(); } long[] ticks = processor.getSystemCpuLoadTicks(); long nice = ticks[CentralProcessor.TickType.NICE.getIndex()] - prevTicks[CentralProcessor.TickType.NICE.getIndex()]; long irq = ticks[CentralProcessor.TickType.IRQ.getIndex()] - prevTicks[CentralProcessor.TickType.IRQ.getIndex()]; long softirq = ticks[CentralProcessor.TickType.SOFTIRQ.getIndex()] - prevTicks[CentralProcessor.TickType.SOFTIRQ.getIndex()]; long steal = ticks[CentralProcessor.TickType.STEAL.getIndex()] - prevTicks[CentralProcessor.TickType.STEAL.getIndex()]; long cSys = ticks[CentralProcessor.TickType.SYSTEM.getIndex()] - prevTicks[CentralProcessor.TickType.SYSTEM.getIndex()]; long user = ticks[CentralProcessor.TickType.USER.getIndex()] - prevTicks[CentralProcessor.TickType.USER.getIndex()]; long iowait = ticks[CentralProcessor.TickType.IOWAIT.getIndex()] - prevTicks[CentralProcessor.TickType.IOWAIT.getIndex()]; long idle = ticks[CentralProcessor.TickType.IDLE.getIndex()] - prevTicks[CentralProcessor.TickType.IDLE.getIndex()]; long totalCpu = user + nice + cSys + idle + iowait + irq + softirq + steal; System.out.println("cpu核数:" + processor.getLogicalProcessorCount()); System.out.println("cpu系统使用率:" + new DecimalFormat("#.##%").format(cSys * 1.0 / totalCpu)); System.out.println("cpu用户使用率:" + new DecimalFormat("#.##%").format(user * 1.0 / totalCpu)); System.out.println("cpu当前等待率:" + new DecimalFormat("#.##%").format(iowait * 1.0 / totalCpu)); System.out.println("cpu当前使用率:" + new DecimalFormat("#.##%").format(1.0 - (idle * 1.0 / totalCpu))); System.err.println("===============cpu信息end===============\n"); } 

获取服务器信息

 /**
     * 获取主机内存信息
     */ private static void getMemoryInfo() { System.err.println("===============主机内存信息begin==============="); SystemInfo systemInfo = new SystemInfo(); GlobalMemory memory = systemInfo.getHardware().getMemory(); long totalMemory = memory.getTotal(); // 总内存 long acaliableMemory = memory.getAvailable(); // 剩余内存 System.out.println("总内存:" + formatByte(totalMemory)); System.out.println("已经使用的内存:" + formatByte(totalMemory - acaliableMemory)); System.out.println("剩余内存:" + formatByte(acaliableMemory)); System.out.println("使用率:" + new DecimalFormat("#.##%").format((totalMemory - acaliableMemory) * 1.0 / totalMemory)); System.err.println("===============主机内存信息end===============\n"); } 

formatByte 换算单位工具类

 /**
     * 换算单位
     *
     * @param byteNumber 换算的数字
     */ private static String formatByte(long byteNumber) { double format = 1024.0; double kbNumber = byteNumber / format; if (kbNumber < format) return new DecimalFormat("#.##KB").format(kbNumber); double mbNumber = kbNumber / format; if (mbNumber < format) return new DecimalFormat("#.##MB").format(mbNumber); double gbNumber = mbNumber / format; if (gbNumber < format) return new DecimalFormat("#.##GB").format(gbNumber); double tbNumber = gbNumber / format; return new DecimalFormat("#.##TB").format(tbNumber); } 

获取操作系统信息

 /**
     * 获取操作系统信息
     */ private static void getSystemInfo() { System.err.println("===============操作系统信息begin=============="); String osName = System.getProperty("os.name"); // 系统名称 String osArch = System.getProperty("os.arch"); // 架构名称 System.out.println("操作系统名称:" + osName); System.out.println("系统架构:" + osArch); System.err.println("===============操作系统信息end==============\n"); } 

获取 JVM 信息

 /**
     * 获取 Jvm 信息
     */ private static void getJvmInfo() { System.err.println("===============Jvm信息begin==============="); Runtime runtime = Runtime.getRuntime(); long jvmTotalMemoryByte = runtime.totalMemory(); // jvm总内存 long jvmMaxMemoryByte = runtime.maxMemory(); // jvm 最大内存 long freeMemoryByte = runtime.freeMemory(); // jvm 空闲空间 String jdkVersion = System.getProperty("java.version"); // jdk 版本 String jdkHome = System.getProperty("java.home"); // jdk 安装路径 System.out.println("jvm总内存:" + formatByte(jvmTotalMemoryByte)); System.out.println("jvm已使用内存:" + formatByte(jvmTotalMemoryByte - freeMemoryByte)); System.out.println("jvm最大内存:" + formatByte(jvmMaxMemoryByte)); System.out.println("jvm剩余内存:" + formatByte(freeMemoryByte)); System.out.println("jvm内存使用率:" + new DecimalFormat("#.##%").format((jvmTotalMemoryByte - freeMemoryByte) * 1.0 / jvmTotalMemoryByte)); System.out.println("jdk版本号:" + jdkVersion); System.out.println("jdk安装路径:" + jdkHome); System.err.println("===============Jvm信息end==============="); } 

测试结果

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