java获取系统信息 jvm 磁盘内存 cpu 系统等信息

Love The Way You Lie 2023-08-17 16:00 148阅读 0赞

1.demo项目地址 链接：https://pan.baidu.com/s/1PNoojWJYWGj7iAV1UCUSRw   
提取码：5b7v

2.启动访问  [http://localhost:8888/swagger-ui.html\#/][http_localhost_8888_swagger-ui.html]

1.添加maven依赖
    
    <dependency>
        <groupId>com.github.oshi</groupId>
        <artifactId>oshi-core</artifactId>
        <version>3.9.1</version>
    </dependency>

2.测试代码

package com.cnczsq.mall.elephant.test;
    
    import com.cnczsq.mall.elephant.utils.IPUtils;
    import oshi.SystemInfo;
    import oshi.hardware.CentralProcessor;
    import oshi.hardware.GlobalMemory;
    import oshi.hardware.HardwareAbstractionLayer;
    import oshi.software.os.FileSystem;
    import oshi.software.os.OSFileStore;
    import oshi.software.os.OperatingSystem;
    import oshi.util.Util;
    
    import java.math.BigDecimal;
    import java.math.RoundingMode;
    import java.net.UnknownHostException;
    import java.util.Properties;
    
    /**
     * @author : zhang sq
     * @date : 2019/9/27 16:48
     **/
    public class SystemMessage {
        public static void main(String[] args) throws UnknownHostException {
            SystemInfo si = new SystemInfo();
            HardwareAbstractionLayer hal = si.getHardware();
            CentralProcessor processor = hal.getProcessor();  //获取cpu信息
            setCpuInfo(processor);
            System.out.println("===============================================================");
            GlobalMemory memory = hal.getMemory();  //获取内存信息
            setMemInfo(memory);
            System.out.println("===============================================================");
            setSysInfo(); //服务器信息
            System.out.println("===============================================================");
            setJvmInfo(); //jvm信息
            System.out.println("===============================================================");
            OperatingSystem op = si.getOperatingSystem();
            setSysFiles(op); //磁盘信息
            System.out.println("===============================================================");
    
        }
    
        /**
         * cpu信息
         * @param processor
         */
        private static void setCpuInfo(CentralProcessor processor) {   // CPU信息
            long[] prevTicks = processor.getSystemCpuLoadTicks();
            Util.sleep(1000);
            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信息===>>>" + processor);
            System.out.println("核心数===>>>" + processor.getLogicalProcessorCount());
            System.out.println("CPU总的使用率totalCpu===>>>" + totalCpu);
            System.out.println("CPU系统使用率cSys===>>>" + cSys);
            System.out.println("CPU用户使用率user===>>>" + user);
            System.out.println("CPU当前等待率iowait===>>>" + iowait);
            System.out.println("CPU当前空闲率idle===>>>" + idle);
        }
    
        /**
         * 内存信息
         */
        private static void setMemInfo(GlobalMemory memory) {
            System.out.println("内存大小字节KB=====>>>"+memory.getTotal());
            System.out.println("已使用内存大小=====>>>"+(memory.getTotal() - memory.getAvailable()));
            System.out.println("剩余内存大小G=====>>>"+memory.getAvailable()/1024/1024/1024); //G
        }
    
        /**
         * 服务器信息
         */
        private static void setSysInfo() {
            Properties props = System.getProperties();
            IPUtils.getHostName();
            IPUtils.getHostIp();
            props.getProperty("os.name");
            props.getProperty("os.arch");
            props.getProperty("user.dir");
            System.out.println("服务器名======>>"+ IPUtils.getHostName());
            System.out.println("ip======>>"+IPUtils.getHostIp());
            System.out.println("系统版本======>>"+ props.getProperty("os.name"));
            System.out.println("位数======>>"+props.getProperty("os.arch"));
            System.out.println("项目地址======>>"+props.getProperty("user.dir"));
        }
    
    
        /**
         * Java虚拟机
         */
        private  static  void setJvmInfo() throws UnknownHostException {
            Properties props = System.getProperties();
            System.out.println("当前JVM占用的内存总数(M)=====>>>>"+div(Runtime.getRuntime().totalMemory(),1024*1024,100));
            System.out.println("JVM最大可用内存总数(M)=====>>>>"+div(Runtime.getRuntime().maxMemory(),1024*1024,100));
            System.out.println("JVM空闲内存(M)=====>>>>"+div(Runtime.getRuntime().freeMemory(),1024*1024,100));
            System.out.println("JDK版本=====>>>>"+props.getProperty("java.version"));
            System.out.println("JDK路径=====>>>>"+props.getProperty("java.home"));
        }
    
        /**
         * 设置磁盘信息
         */
        private static void setSysFiles(OperatingSystem os) {
            FileSystem fileSystem = os.getFileSystem();
            OSFileStore[] fsArray = fileSystem.getFileStores();
            for (OSFileStore fs : fsArray) {
                long free = fs.getUsableSpace();
                long total = fs.getTotalSpace();
                long used = total - free;
                System.out.println("盘符路径======>>>>"+fs.getMount());
                System.out.println("盘符类型======>>>>"+fs.getType());
                System.out.println("文件类型======>>>>"+fs.getName());
                System.out.println("总大小======>>>>"+convertFileSize(total));
                System.out.println("剩余大小======>>>>"+convertFileSize(free));
                System.out.println("已经使用量======>>>>"+convertFileSize(used));
                System.out.println("资源的使用率======>>>>"+div(used, total, 4));
                System.out.println("=======================================");
            }
        }
    
        /**
         * 字节转换
         *
         * @param size 字节大小
         * @return 转换后值
         */
        public  static String convertFileSize(long size) {
            long kb = 1024;
            long mb = kb * 1024;
            long gb = mb * 1024;
            if (size >= gb) {
                return String.format("%.1f GB", (float) size / gb);
            } else if (size >= mb) {
                float f = (float) size / mb;
                return String.format(f > 100 ? "%.0f MB" : "%.1f MB", f);
            } else if (size >= kb) {
                float f = (float) size / kb;
                return String.format(f > 100 ? "%.0f KB" : "%.1f KB", f);
            } else {
                return String.format("%d B", size);
            }
        }
    
        /**
         * 提供（相对）精确的除法运算。当发生除不尽的情况时，由scale参数指
         * 定精度，以后的数字四舍五入。
         * @param v1 被除数
         * @param v2 除数
         * @param scale 表示表示需要精确到小数点以后几位。
         * @return 两个参数的商
         */
        public static double div(double v1, double v2, int scale)
        {
            if (scale < 0)
            {
                throw new IllegalArgumentException(
                        "The scale must be a positive integer or zero");
            }
            BigDecimal b1 = new BigDecimal(Double.toString(v1));
            BigDecimal b2 = new BigDecimal(Double.toString(v2));
            if (b1.compareTo(BigDecimal.ZERO) == 0)
            {
                return BigDecimal.ZERO.doubleValue();
            }
            return b1.divide(b2, scale, RoundingMode.HALF_UP).doubleValue();
        }
    }

[http_localhost_8888_swagger-ui.html]: http://localhost:8888/swagger-ui.html#/