java获取电脑cpu，系统相关信息，jvm，文件盘符相关信息

1.准备cpu，jvm，文件盘符实体类

package com.joolun.framework.web.domain.server;

import java.lang.management.ManagementFactory;
import com.joolun.common.utils.Arith;
import com.joolun.common.utils.DateUtils;

/**
 * JVM相关信息
 * 
 * @author ruoyi
 */
public class Jvm
{
    /**
     * 当前JVM占用的内存总数(M)
     */
    private double total;

    /**
     * JVM最大可用内存总数(M)
     */
    private double max;

    /**
     * JVM空闲内存(M)
     */
    private double free;

    /**
     * JDK版本
     */
    private String version;

    /**
     * JDK路径
     */
    private String home;

    public double getTotal()
    {
        return Arith.div(total, (1024 * 1024), 2);
    }

    public void setTotal(double total)
    {
        this.total = total;
    }

    public double getMax()
    {
        return Arith.div(max, (1024 * 1024), 2);
    }

    public void setMax(double max)
    {
        this.max = max;
    }

    public double getFree()
    {
        return Arith.div(free, (1024 * 1024), 2);
    }

    public void setFree(double free)
    {
        this.free = free;
    }

    public double getUsed()
    {
        return Arith.div(total - free, (1024 * 1024), 2);
    }

    public double getUsage()
    {
        return Arith.mul(Arith.div(total - free, total, 4), 100);
    }

    /**
     * 获取JDK名称
     */
    public String getName()
    {
        return ManagementFactory.getRuntimeMXBean().getVmName();
    }

    public String getVersion()
    {
        return version;
    }

    public void setVersion(String version)
    {
        this.version = version;
    }

    public String getHome()
    {
        return home;
    }

    public void setHome(String home)
    {
        this.home = home;
    }

    /**
     * JDK启动时间
     */
    public String getStartTime()
    {
        return DateUtils.parseDateToStr(DateUtils.YYYY_MM_DD_HH_MM_SS, DateUtils.getServerStartDate());
    }

    /**
     * JDK运行时间
     */
    public String getRunTime()
    {
        return DateUtils.getDatePoor(DateUtils.getNowDate(), DateUtils.getServerStartDate());
    }
}

package com.joolun.framework.web.domain.server;

import com.joolun.common.utils.Arith;

/**
 * CPU相关信息
 * 
 * @author ruoyi
 */
public class Cpu
{
    /**
     * 核心数
     */
    private int cpuNum;

    /**
     * CPU总的使用率
     */
    private double total;

    /**
     * CPU系统使用率
     */
    private double sys;

    /**
     * CPU用户使用率
     */
    private double used;

    /**
     * CPU当前等待率
     */
    private double wait;

    /**
     * CPU当前空闲率
     */
    private double free;

    public int getCpuNum()
    {
        return cpuNum;
    }

    public void setCpuNum(int cpuNum)
    {
        this.cpuNum = cpuNum;
    }

    public double getTotal()
    {
        return Arith.round(Arith.mul(total, 100), 2);
    }

    public void setTotal(double total)
    {
        this.total = total;
    }

    public double getSys()
    {
        return Arith.round(Arith.mul(sys / total, 100), 2);
    }

    public void setSys(double sys)
    {
        this.sys = sys;
    }

    public double getUsed()
    {
        return Arith.round(Arith.mul(used / total, 100), 2);
    }

    public void setUsed(double used)
    {
        this.used = used;
    }

    public double getWait()
    {
        return Arith.round(Arith.mul(wait / total, 100), 2);
    }

    public void setWait(double wait)
    {
        this.wait = wait;
    }

    public double getFree()
    {
        return Arith.round(Arith.mul(free / total, 100), 2);
    }

    public void setFree(double free)
    {
        this.free = free;
    }
}

package com.joolun.framework.web.domain.server;

import com.joolun.common.utils.Arith;

/**
 * 內存相关信息
 * 
 * @author ruoyi
 */
public class Mem
{
    /**
     * 内存总量
     */
    private double total;

    /**
     * 已用内存
     */
    private double used;

    /**
     * 剩余内存
     */
    private double free;

    public double getTotal()
    {
        return Arith.div(total, (1024 * 1024 * 1024), 2);
    }

    public void setTotal(long total)
    {
        this.total = total;
    }

    public double getUsed()
    {
        return Arith.div(used, (1024 * 1024 * 1024), 2);
    }

    public void setUsed(long used)
    {
        this.used = used;
    }

    public double getFree()
    {
        return Arith.div(free, (1024 * 1024 * 1024), 2);
    }

    public void setFree(long free)
    {
        this.free = free;
    }

    public double getUsage()
    {
        return Arith.mul(Arith.div(used, total, 4), 100);
    }
}

package com.joolun.framework.web.domain.server;

/**
 * 系统相关信息
 * 
 * @author ruoyi
 */
public class Sys
{
    /**
     * 服务器名称
     */
    private String computerName;

    /**
     * 服务器Ip
     */
    private String computerIp;

    /**
     * 项目路径
     */
    private String userDir;

    /**
     * 操作系统
     */
    private String osName;

    /**
     * 系统架构
     */
    private String osArch;

    public String getComputerName()
    {
        return computerName;
    }

    public void setComputerName(String computerName)
    {
        this.computerName = computerName;
    }

    public String getComputerIp()
    {
        return computerIp;
    }

    public void setComputerIp(String computerIp)
    {
        this.computerIp = computerIp;
    }

    public String getUserDir()
    {
        return userDir;
    }

    public void setUserDir(String userDir)
    {
        this.userDir = userDir;
    }

    public String getOsName()
    {
        return osName;
    }

    public void setOsName(String osName)
    {
        this.osName = osName;
    }

    public String getOsArch()
    {
        return osArch;
    }

    public void setOsArch(String osArch)
    {
        this.osArch = osArch;
    }
}

package com.joolun.framework.web.domain.server;

/**
 * 系统文件相关信息
 * 
 * @author ruoyi
 */
public class SysFile
{
    /**
     * 盘符路径
     */
    private String dirName;

    /**
     * 盘符类型
     */
    private String sysTypeName;

    /**
     * 文件类型
     */
    private String typeName;

    /**
     * 总大小
     */
    private String total;

    /**
     * 剩余大小
     */
    private String free;

    /**
     * 已经使用量
     */
    private String used;

    /**
     * 资源的使用率
     */
    private double usage;

    public String getDirName()
    {
        return dirName;
    }

    public void setDirName(String dirName)
    {
        this.dirName = dirName;
    }

    public String getSysTypeName()
    {
        return sysTypeName;
    }

    public void setSysTypeName(String sysTypeName)
    {
        this.sysTypeName = sysTypeName;
    }

    public String getTypeName()
    {
        return typeName;
    }

    public void setTypeName(String typeName)
    {
        this.typeName = typeName;
    }

    public String getTotal()
    {
        return total;
    }

    public void setTotal(String total)
    {
        this.total = total;
    }

    public String getFree()
    {
        return free;
    }

    public void setFree(String free)
    {
        this.free = free;
    }

    public String getUsed()
    {
        return used;
    }

    public void setUsed(String used)
    {
        this.used = used;
    }

    public double getUsage()
    {
        return usage;
    }

    public void setUsage(double usage)
    {
        this.usage = usage;
    }
}

2.使用的工具类

package com.joolun.common.utils;

import java.math.BigDecimal;
import java.math.RoundingMode;

/**
 * 精确的浮点数运算
 * 
 * @author ruoyi
 */
public class Arith
{

    /** 默认除法运算精度 */
    private static final int DEF_DIV_SCALE = 10;

    /** 这个类不能实例化 */
    private Arith()
    {
    }

    /**
     * 提供精确的加法运算。
     * @param v1 被加数
     * @param v2 加数
     * @return 两个参数的和
     */
    public static double add(double v1, double v2)
    {
        BigDecimal b1 = new BigDecimal(Double.toString(v1));
        BigDecimal b2 = new BigDecimal(Double.toString(v2));
        return b1.add(b2).doubleValue();
    }

    /**
     * 提供精确的减法运算。
     * @param v1 被减数
     * @param v2 减数
     * @return 两个参数的差
     */
    public static double sub(double v1, double v2)
    {
        BigDecimal b1 = new BigDecimal(Double.toString(v1));
        BigDecimal b2 = new BigDecimal(Double.toString(v2));
        return b1.subtract(b2).doubleValue();
    }

    /**
     * 提供精确的乘法运算。
     * @param v1 被乘数
     * @param v2 乘数
     * @return 两个参数的积
     */
    public static double mul(double v1, double v2)
    {
        BigDecimal b1 = new BigDecimal(Double.toString(v1));
        BigDecimal b2 = new BigDecimal(Double.toString(v2));
        return b1.multiply(b2).doubleValue();
    }

    /**
     * 提供（相对）精确的除法运算，当发生除不尽的情况时，精确到
     * 小数点以后10位，以后的数字四舍五入。
     * @param v1 被除数
     * @param v2 除数
     * @return 两个参数的商
     */
    public static double div(double v1, double v2)
    {
        return div(v1, v2, DEF_DIV_SCALE);
    }

    /**
     * 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();
    }

    /**
     * 提供精确的小数位四舍五入处理。
     * @param v 需要四舍五入的数字
     * @param scale 小数点后保留几位
     * @return 四舍五入后的结果
     */
    public static double round(double v, int scale)
    {
        if (scale < 0)
        {
            throw new IllegalArgumentException(
                    "The scale must be a positive integer or zero");
        }
        BigDecimal b = new BigDecimal(Double.toString(v));
        BigDecimal one = new BigDecimal("1");
        return b.divide(one, scale, RoundingMode.HALF_UP).doubleValue();
    }
}

package com.joolun.common.utils;

import java.lang.management.ManagementFactory;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import org.apache.commons.lang3.time.DateFormatUtils;

/**
 * 时间工具类
 * 
 * @author ruoyi
 */
public class DateUtils extends org.apache.commons.lang3.time.DateUtils
{
    public static String YYYY = "yyyy";

    public static String YYYY_MM = "yyyy-MM";

    public static String YYYY_MM_DD = "yyyy-MM-dd";

    public static String YYYYMMDDHHMMSS = "yyyyMMddHHmmss";

    public static String YYYY_MM_DD_HH_MM_SS = "yyyy-MM-dd HH:mm:ss";
    
    private static String[] parsePatterns = {
            "yyyy-MM-dd", "yyyy-MM-dd HH:mm:ss", "yyyy-MM-dd HH:mm", "yyyy-MM", 
            "yyyy/MM/dd", "yyyy/MM/dd HH:mm:ss", "yyyy/MM/dd HH:mm", "yyyy/MM",
            "yyyy.MM.dd", "yyyy.MM.dd HH:mm:ss", "yyyy.MM.dd HH:mm", "yyyy.MM"};

    /**
     * 获取当前Date型日期
     * 
     * @return Date() 当前日期
     */
    public static Date getNowDate()
    {
        return new Date();
    }

    /**
     * 获取当前日期, 默认格式为yyyy-MM-dd
     * 
     * @return String
     */
    public static String getDate()
    {
        return dateTimeNow(YYYY_MM_DD);
    }

    public static final String getTime()
    {
        return dateTimeNow(YYYY_MM_DD_HH_MM_SS);
    }

    public static final String dateTimeNow()
    {
        return dateTimeNow(YYYYMMDDHHMMSS);
    }

    public static final String dateTimeNow(final String format)
    {
        return parseDateToStr(format, new Date());
    }

    public static final String dateTime(final Date date)
    {
        return parseDateToStr(YYYY_MM_DD, date);
    }

    public static final String parseDateToStr(final String format, final Date date)
    {
        return new SimpleDateFormat(format).format(date);
    }

    public static final Date dateTime(final String format, final String ts)
    {
        try
        {
            return new SimpleDateFormat(format).parse(ts);
        }
        catch (ParseException e)
        {
            throw new RuntimeException(e);
        }
    }

    /**
     * 日期路径 即年/月/日 如2018/08/08
     */
    public static final String datePath()
    {
        Date now = new Date();
        return DateFormatUtils.format(now, "yyyy/MM/dd");
    }

    /**
     * 日期路径 即年/月/日 如20180808
     */
    public static final String dateTime()
    {
        Date now = new Date();
        return DateFormatUtils.format(now, "yyyyMMdd");
    }

    /**
     * 日期型字符串转化为日期 格式
     */
    public static Date parseDate(Object str)
    {
        if (str == null)
        {
            return null;
        }
        try
        {
            return parseDate(str.toString(), parsePatterns);
        }
        catch (ParseException e)
        {
            return null;
        }
    }
    
    /**
     * 获取服务器启动时间
     */
    public static Date getServerStartDate()
    {
        long time = ManagementFactory.getRuntimeMXBean().getStartTime();
        return new Date(time);
    }

    /**
     * 计算两个时间差
     */
    public static String getDatePoor(Date endDate, Date nowDate)
    {
        long nd = 1000 * 24 * 60 * 60;
        long nh = 1000 * 60 * 60;
        long nm = 1000 * 60;
        // long ns = 1000;
        // 获得两个时间的毫秒时间差异
        long diff = endDate.getTime() - nowDate.getTime();
        // 计算差多少天
        long day = diff / nd;
        // 计算差多少小时
        long hour = diff % nd / nh;
        // 计算差多少分钟
        long min = diff % nd % nh / nm;
        // 计算差多少秒//输出结果
        // long sec = diff % nd % nh % nm / ns;
        return day + "天" + hour + "小时" + min + "分钟";
    }
}

3.导入pom

    
            <!-- 获取系统信息 -->
            <dependency>
                <groupId>com.github.oshi</groupId>
                <artifactId>oshi-core</artifactId>
                <version>5.3.6</version>
            </dependency>

4.封装的工具类

package com.joolun.framework.web.domain;

import java.net.UnknownHostException;
import java.util.LinkedList;
import java.util.List;
import java.util.Properties;
import com.joolun.common.utils.Arith;
import com.joolun.common.utils.ip.IpUtils;
import com.joolun.framework.web.domain.server.Cpu;
import com.joolun.framework.web.domain.server.Jvm;
import com.joolun.framework.web.domain.server.Mem;
import com.joolun.framework.web.domain.server.Sys;
import com.joolun.framework.web.domain.server.SysFile;
import oshi.SystemInfo;
import oshi.hardware.CentralProcessor;
import oshi.hardware.CentralProcessor.TickType;
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;

/**
 * 服务器相关信息
 * 
 * @author ruoyi
 */
public class Server
{
    private static final int OSHI_WAIT_SECOND = 1000;
    
    /**
     * CPU相关信息
     */
    private Cpu cpu = new Cpu();

    /**
     * 內存相关信息
     */
    private Mem mem = new Mem();

    /**
     * JVM相关信息
     */
    private Jvm jvm = new Jvm();

    /**
     * 服务器相关信息
     */
    private Sys sys = new Sys();

    /**
     * 磁盘相关信息
     */
    private List<SysFile> sysFiles = new LinkedList<SysFile>();

    public Cpu getCpu()
    {
        return cpu;
    }

    public void setCpu(Cpu cpu)
    {
        this.cpu = cpu;
    }

    public Mem getMem()
    {
        return mem;
    }

    public void setMem(Mem mem)
    {
        this.mem = mem;
    }

    public Jvm getJvm()
    {
        return jvm;
    }

    public void setJvm(Jvm jvm)
    {
        this.jvm = jvm;
    }

    public Sys getSys()
    {
        return sys;
    }

    public void setSys(Sys sys)
    {
        this.sys = sys;
    }

    public List<SysFile> getSysFiles()
    {
        return sysFiles;
    }

    public void setSysFiles(List<SysFile> sysFiles)
    {
        this.sysFiles = sysFiles;
    }

    public void copyTo() throws Exception
    {
        SystemInfo si = new SystemInfo();
        HardwareAbstractionLayer hal = si.getHardware();

        setCpuInfo(hal.getProcessor());

        setMemInfo(hal.getMemory());

        setSysInfo();

        setJvmInfo();

        setSysFiles(si.getOperatingSystem());
    }

    /**
     * 设置CPU信息
     */
    private void setCpuInfo(CentralProcessor processor)
    {
        // CPU信息
        long[] prevTicks = processor.getSystemCpuLoadTicks();
        Util.sleep(OSHI_WAIT_SECOND);
        long[] ticks = processor.getSystemCpuLoadTicks();
        long nice = ticks[TickType.NICE.getIndex()] - prevTicks[TickType.NICE.getIndex()];
        long irq = ticks[TickType.IRQ.getIndex()] - prevTicks[TickType.IRQ.getIndex()];
        long softirq = ticks[TickType.SOFTIRQ.getIndex()] - prevTicks[TickType.SOFTIRQ.getIndex()];
        long steal = ticks[TickType.STEAL.getIndex()] - prevTicks[TickType.STEAL.getIndex()];
        long cSys = ticks[TickType.SYSTEM.getIndex()] - prevTicks[TickType.SYSTEM.getIndex()];
        long user = ticks[TickType.USER.getIndex()] - prevTicks[TickType.USER.getIndex()];
        long iowait = ticks[TickType.IOWAIT.getIndex()] - prevTicks[TickType.IOWAIT.getIndex()];
        long idle = ticks[TickType.IDLE.getIndex()] - prevTicks[TickType.IDLE.getIndex()];
        long totalCpu = user + nice + cSys + idle + iowait + irq + softirq + steal;
        cpu.setCpuNum(processor.getLogicalProcessorCount());
        cpu.setTotal(totalCpu);
        cpu.setSys(cSys);
        cpu.setUsed(user);
        cpu.setWait(iowait);
        cpu.setFree(idle);
    }

    /**
     * 设置内存信息
     */
    private void setMemInfo(GlobalMemory memory)
    {
        mem.setTotal(memory.getTotal());
        mem.setUsed(memory.getTotal() - memory.getAvailable());
        mem.setFree(memory.getAvailable());
    }

    /**
     * 设置服务器信息
     */
    private void setSysInfo()
    {
        Properties props = System.getProperties();
        sys.setComputerName(IpUtils.getHostName());
        sys.setComputerIp(IpUtils.getHostIp());
        sys.setOsName(props.getProperty("os.name"));
        sys.setOsArch(props.getProperty("os.arch"));
        sys.setUserDir(props.getProperty("user.dir"));
    }

    /**
     * 设置Java虚拟机
     */
    private void setJvmInfo() throws UnknownHostException
    {
        Properties props = System.getProperties();
        jvm.setTotal(Runtime.getRuntime().totalMemory());
        jvm.setMax(Runtime.getRuntime().maxMemory());
        jvm.setFree(Runtime.getRuntime().freeMemory());
        jvm.setVersion(props.getProperty("java.version"));
        jvm.setHome(props.getProperty("java.home"));
    }

    /**
     * 设置磁盘信息
     */
    private void setSysFiles(OperatingSystem os)
    {
        FileSystem fileSystem = os.getFileSystem();
        List<OSFileStore> fsArray = fileSystem.getFileStores();
        for (OSFileStore fs : fsArray)
        {
            long free = fs.getUsableSpace();
            long total = fs.getTotalSpace();
            long used = total - free;
            SysFile sysFile = new SysFile();
            sysFile.setDirName(fs.getMount());
            sysFile.setSysTypeName(fs.getType());
            sysFile.setTypeName(fs.getName());
            sysFile.setTotal(convertFileSize(total));
            sysFile.setFree(convertFileSize(free));
            sysFile.setUsed(convertFileSize(used));
            sysFile.setUsage(Arith.mul(Arith.div(used, total, 4), 100));
            sysFiles.add(sysFile);
        }
    }

    /**
     * 字节转换
     * 
     * @param size 字节大小
     * @return 转换后值
     */
    public 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);
        }
    }
}

5.控制层获取

package com.joolun.web.controller.monitor;

import org.springframework.security.access.prepost.PreAuthorize;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import com.joolun.common.core.domain.AjaxResult;
import com.joolun.framework.web.domain.Server;

/**
 * 服务器监控
 * 
 * @author ruoyi
 */
@RestController
@RequestMapping("/monitor/server")
public class ServerController
{
    @PreAuthorize("@ss.hasPermi('monitor:server:list')")
    @GetMapping()
    public AjaxResult getInfo() throws Exception
    {
        Server server = new Server();
        server.copyTo();
        return AjaxResult.success(server);
    }
}