Java获取服务器CPU、内存、磁盘、系统信息

导入依赖

<!-- 获取系统信息 -->
<dependency>
    <groupId>com.github.oshi</groupId>
    <artifactId>oshi-core</artifactId>
    <version>3.9.1</version>
</dependency>
<!-- hutool工具包 -->
<dependency>
    <groupId>cn.hutool</groupId>
    <artifactId>hutool-all</artifactId>
    <version>5.3.1</version>
</dependency>

新建CPU类存放CPU信息

import cn.hutool.core.util.NumberUtil;

/**
 * CPU信息
 */
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 (NumberUtil.round(NumberUtil.mul(total, 100), 2)).doubleValue();
    }

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

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

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

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

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

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

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

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

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

新建磁盘类存放磁盘信息

/**
 * 磁盘信息
 */
public class Disk {
    /**
     * 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;
    }
}

新建内存类存内存信息

import cn.hutool.core.util.NumberUtil;

/**
 * 內存信息
 */
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 NumberUtil.div(total, (1024 * 1024 * 1024), 2);
    }

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

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

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

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

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

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

新建系统类存系统信息

/**
 * 系统信息
 */
public class System{
    /**
     * 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;
    }
}

最后新建服务器类整合所有信息

import cn.hutool.core.net.NetUtil;
import cn.hutool.core.util.NumberUtil;
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;

import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.LinkedList;
import java.util.List;
import java.util.Properties;

/**
 * 主机信息
 */
public class Server{
    private static final int OSHI_WAIT_SECOND = 1000;

    /**
     * CPU信息
     */
    private Cpu cpu = new Cpu();

    /**
     * 內存信息
     */
    private Mem mem = new Mem();

    /**
     * 系统信息
     */
    private System sys = new System();

    /**
     * 磁盘信息
     */
    private List<Disk> disks = new LinkedList<Disk>();

    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 System getSys()
    {
        return sys;
    }

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

    public List<Disk> getDisks()
    {
        return disks;
    }

    public void setDisks(List<Disk> disks)
    {
        this.disks = disks;
    }

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

        setCpuInfo(hal.getProcessor());

        setMemInfo(hal.getMemory());

        setSysInfo();

        setDisksInfo(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()
    {
        InetAddress addr = null;
        try {
            addr = InetAddress.getLocalHost();
        } catch (UnknownHostException e) {
            e.printStackTrace();
        }
        Properties props = java.lang.System.getProperties();
        assert addr != null;
        sys.setComputerName(addr.getHostName());
        sys.setComputerIp(NetUtil.getLocalhostStr());
        sys.setOsName(props.getProperty("os.name"));
        sys.setOsArch(props.getProperty("os.arch"));
        sys.setUserDir(props.getProperty("user.dir"));
    }

    /**
     * 设置磁盘信息
     */
    private void setDisksInfo(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;
            Disk disk = new Disk();
            disk.setDirName(fs.getMount());
            disk.setSysTypeName(fs.getType());
            disk.setTypeName(fs.getName());
            disk.setTotal(convertFileSize(total));
            disk.setFree(convertFileSize(free));
            disk.setUsed(convertFileSize(used));
            disk.setUsage(NumberUtil.mul(NumberUtil.div(used, total, 4), 100));
            disks.add(disk);
        }
    }

    /**
     * 字节转换
     */
    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);
        }
    }
}

例行测试

新建测试类打印获取到的信息。

import cn.hutool.json.JSONUtil;
import com.example.demo.serverinfo.Server;
import org.junit.jupiter.api.Test;
import org.junit.runner.RunWith;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;

@RunWith(SpringRunner.class)
@SpringBootTest
class MqTest {
    @Test
    public void serverInfo() throws Exception {
        Server server = new Server();
        server.serverInfo();
        System.out.println(JSONUtil.toJsonStr(server));
    }
}

启动单元测试，可以看到已经打印出了我们想要的信息了。