Java獲取Linux服務(wù)器CPU、內(nèi)存、磁盤信息的示例詳解

更新時(shí)間：2025年06月09日 09:39:05 作者：思靜魚

本文介紹了使用Java內(nèi)置API、第三方庫(kù)OSHI及JMX和命令行工具監(jiān)控Linux服務(wù)器CPU、內(nèi)存、磁盤等系統(tǒng)信息的方法,并提供示例代碼實(shí)現(xiàn)整合監(jiān)控功能,需要的朋友可以參考下

使用 Java Management API

通過Java自帶的ManagementFactory和MXBean接口獲取系統(tǒng)級(jí)別信息，如CPU負(fù)載和內(nèi)存使用情況。

示例代碼：

import java.lang.management.ManagementFactory;
import java.lang.management.OperatingSystemMXBean;
import java.lang.management.MemoryMXBean;

public class SystemMonitor {
    public static void main(String[] args) {
        OperatingSystemMXBean osBean = ManagementFactory.getOperatingSystemMXBean();
        MemoryMXBean memoryBean = ManagementFactory.getMemoryMXBean();

        System.out.println("CPU負(fù)載: " + osBean.getSystemLoadAverage());
        System.out.println("堆內(nèi)存使用: " + memoryBean.getHeapMemoryUsage().getUsed() + " bytes");
    }
}

使用第三方庫(kù)OSHI

OSHI：一個(gè)強(qiáng)大的Java庫(kù)，用于獲取操作系統(tǒng)和硬件信息，支持CPU、內(nèi)存、磁盤等監(jiān)控。示例代碼：

import oshi.SystemInfo;
import oshi.hardware.CentralProcessor;
import oshi.software.os.OperatingSystem;

public class SystemMonitor {
    public static void main(String[] args) {
        SystemInfo systemInfo = new SystemInfo();
        CentralProcessor processor = systemInfo.getHardware().getProcessor();
        OperatingSystem os = systemInfo.getOperatingSystem();

        System.out.println("CPU負(fù)載: " + processor.getSystemCpuLoadBetweenTicks() * 100 + "%");
        System.out.println("總內(nèi)存: " + systemInfo.getHardware().getMemory().getTotal() + " bytes");
    }
}

import oshi.SystemInfo;
import oshi.hardware.CentralProcessor;
import oshi.hardware.GlobalMemory;
import oshi.software.os.FileSystem;
import oshi.software.os.OSFileStore;
import oshi.software.os.NetworkIF;
import oshi.software.os.OperatingSystem;
import oshi.software.os.OperatingSystemVersion;

public class SystemMetrics {

    public static void main(String[] args) {
        SystemInfo systemInfo = new SystemInfo();
        CentralProcessor processor = systemInfo.getHardware().getProcessor();
        GlobalMemory memory = systemInfo.getHardware().getMemory();
        OperatingSystem os = systemInfo.getOperatingSystem();
        FileSystem fileSystem = os.getFileSystem();
        NetworkIF[] networkIFs = os.getNetworkIFs();

        // CPU 使用率
        double cpuLoad = processor.getSystemCpuLoad() * 100;
        System.out.println("CPU Load: " + cpuLoad + "%");

        // 內(nèi)存使用情況
        long totalMemory = memory.getTotal();
        long usedMemory = totalMemory - memory.getAvailable();
        System.out.println("Used Memory: " + (usedMemory / (1024 * 1024)) + " MB");
        System.out.println("Total Memory: " + (totalMemory / (1024 * 1024)) + " MB");

        // 磁盤使用情況
        for (OSFileStore fileStore : fileSystem.getFileStores()) {
            System.out.println("Disk: " + fileStore.getMount() +
                    ", Total: " + (fileStore.getTotalSpace() / (1024 * 1024)) + " MB" +
                    ", Usable: " + (fileStore.getUsableSpace() / (1024 * 1024)) + " MB" +
                    ", Used: " + ((fileStore.getTotalSpace() - fileStore.getUsableSpace()) / (1024 * 1024)) + " MB");
        }

        // 網(wǎng)絡(luò)帶寬使用情況
        for (NetworkIF net : networkIFs) {
            long[] prevIO = net.getBytesRecv();
            long[] currIO = net.getBytesSent();
            System.out.println("Network Interface: " + net.getName());
            System.out.println("Received: " + (prevIO[0] / 1024) + " KB, Sent: " + (currIO[0] / 1024) + " KB");
        }
    }
}

使用 JMX（Java Management Extensions）

可以通過JMX監(jiān)控Java應(yīng)用的性能指標(biāo)，并可以監(jiān)控JVM自身的內(nèi)存和線程使用情況。

使用命令行工具ProcessBuilder或Runtime.exec()

可以通過執(zhí)行系統(tǒng)命令（如top, df, free等）獲取系統(tǒng)信息，使用ProcessBuilder來運(yùn)行命令并獲取輸出。

示例代碼：

import java.io.BufferedReader;
import java.io.InputStreamReader;

public class CommandLineMonitor {
    public static void main(String[] args) {
        try {
            Process process = new ProcessBuilder("sh", "-c", "top -bn1 | grep 'Cpu'").start();
            BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()));
            String line;
            while ((line = reader.readLine()) != null) {
                System.out.println(line);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

來執(zhí)行系統(tǒng)命令并獲取輸出

在Java中使用命令行工具監(jiān)控服務(wù)器的CPU、內(nèi)存和磁盤使用情況，可以通過ProcessBuilder或Runtime.exec()來執(zhí)行系統(tǒng)命令并獲取輸出。以下是實(shí)現(xiàn)的示例代碼：

1. 監(jiān)控CPU使用情況

可以使用top或mpstat命令來獲取CPU使用情況。以下示例使用top命令：

mport java.io.BufferedReader;
import java.io.InputStreamReader;

public class CpuMonitor {
    public static void main(String[] args) {
        try {
            ProcessBuilder processBuilder = new ProcessBuilder("sh", "-c", "top -bn1 | grep 'Cpu'");
            Process process = processBuilder.start();
            BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()));
            String line;
            while ((line = reader.readLine()) != null) {
                System.out.println("CPU使用情況: " + line);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

2. 監(jiān)控內(nèi)存使用情況

可以使用free命令獲取內(nèi)存使用情況：

public class MemoryMonitor {
    public static void main(String[] args) {
        try {
            ProcessBuilder processBuilder = new ProcessBuilder("sh", "-c", "free -h");
            Process process = processBuilder.start();
            BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()));
            String line;
            while ((line = reader.readLine()) != null) {
                System.out.println("內(nèi)存使用情況: " + line);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

3. 監(jiān)控磁盤使用情況

可以使用df命令來獲取磁盤使用情況：

public class DiskMonitor {
    public static void main(String[] args) {
        try {
            ProcessBuilder processBuilder = new ProcessBuilder("sh", "-c", "df -h");
            Process process = processBuilder.start();
            BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()));
            String line;
            while ((line = reader.readLine()) != null) {
                System.out.println("磁盤使用情況: " + line);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

4. 組合監(jiān)控

可以將這些功能組合到一個(gè)程序中，以便在定時(shí)任務(wù)中執(zhí)行：

import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;

public class SystemMonitor {
    public static void main(String[] args) {
        ScheduledExecutorService scheduler = Executors.newScheduledThreadPool(1);
        
        scheduler.scheduleAtFixedRate(() -> {
            monitorCpu();
            monitorMemory();
            monitorDisk();
        }, 0, 10, TimeUnit.SECONDS);
    }

    private static void monitorCpu() {
        executeCommand("top -bn1 | grep 'Cpu'");
    }

    private static void monitorMemory() {
        executeCommand("free -h");
    }

    private static void monitorDisk() {
        executeCommand("df -h");
    }

    private static void executeCommand(String command) {
        try {
            ProcessBuilder processBuilder = new ProcessBuilder("sh", "-c", command);
            Process process = processBuilder.start();
            BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()));
            String line;
            while ((line = reader.readLine()) != null) {
                System.out.println(line);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

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