import java.io.BufferedReader;  
import java.io.IOException;  
import java.io.InputStreamReader;  
public class CPULoadChecker {  
    public static void main(String[] args) {  
        String command = "mpstat 1 1"; // 運(yùn)行mpstat命令，每秒更新一次，總共更新一次  
        try {  
            Process process = Runtime.getRuntime().exec(command);  
            BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()));  
            String line;  
            boolean foundCpuLine = false;  
            // 讀取命令的輸出  
            while ((line = reader.readLine()) != null) {  
                // 跳過標(biāo)題行和其他不相關(guān)的行，只保留包含CPU信息的行  
                if (line.startsWith("avg-cpu:")) {  
                    foundCpuLine = true;  
                    System.out.println("CPU Load Information:");  
                    System.out.println(line); // 打印CPU負(fù)載信息行  
                    break; // 假設(shè)我們只關(guān)心第一行（平均負(fù)載）  
                }  
            }  
            if (!foundCpuLine) {  
                System.out.println("No CPU load information found.");  
            }  
            reader.close();  
        } catch (IOException e) {  
            e.printStackTrace();  
        }  
    }  
}

import java.io.BufferedReader;  
import java.io.IOException;  
import java.io.InputStreamReader;  
public class CPULoadChecker {  
    public static void main(String[] args) {  
        String os = System.getProperty("os.name").toLowerCase();  
        if (os.contains("win")) {  
            System.out.println("This example is for Linux. For Windows, consider using other methods.");  
            return;  
        }  
        String command = "top -bn1 | grep 'Cpu(s)'"; // 執(zhí)行top命令并只獲取Cpu(s)行  
        try {  
            Process process = Runtime.getRuntime().exec(new String[]{"bash", "-c", command});  
            BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()));  
            String line;  
            boolean foundCpuLine = false;  
            // 讀取命令的輸出  
            while ((line = reader.readLine()) != null) {  
                if (line.startsWith("Cpu(s):")) {  
                    foundCpuLine = true;  
                    // 解析Cpu(s)行的信息，這里只獲取用戶+系統(tǒng)時(shí)間作為負(fù)載的近似值  
                    String[] parts = line.split("\\s+");  
                    if (parts.length > 7) {  
                        String user = parts[1]; // 用戶空間時(shí)間  
                        String system = parts[3]; // 內(nèi)核空間時(shí)間  
                        double load = Double.parseDouble(user) + Double.parseDouble(system);  
                        // 假設(shè)我們只關(guān)心用戶和系統(tǒng)時(shí)間，并且它們都是以百分比表示的  
                        // 注意：這不是真正的CPU負(fù)載，只是用戶和系統(tǒng)時(shí)間的總和  
                        System.out.printf("Approximate CPU Load: %.2f%% (User: %.2f%%, System: %.2f%%)%n",  
                                load, Double.parseDouble(user), Double.parseDouble(system));  
                    }  
                    break;  
                }  
            }  
            if (!foundCpuLine) {  
                System.out.println("No CPU load information found.");  
            }  
            reader.close();  
        } catch (IOException e) {  
            e.printStackTrace();  
        }  
    }  
}

import java.io.BufferedReader;  
import java.io.IOException;  
import java.io.InputStreamReader;  
public class CPULoadCheckerWindows {  
    public static void main(String[] args) {  
        String command = "wmic cpu get loadpercentage /value";  
        try {  
            Process process = Runtime.getRuntime().exec(new String[]{"cmd.exe", "/c", command});  
            BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()));  
            String line;  
            while ((line = reader.readLine()) != null) {  
                // 跳過標(biāo)題行和其他不相關(guān)的行  
                if (line.contains("LoadPercentage=")) {  
                    // 解析CPU負(fù)載百分比  
                    String[] parts = line.split("=");  
                    if (parts.length > 1) {  
                        String cpuLoad = parts[1].trim();  
                        // 移除百分號并轉(zhuǎn)換為整數(shù)（如果需要）  
                        int load = Integer.parseInt(cpuLoad.replace("%", ""));  
                        System.out.println("CPU Load: " + load + "%");  
                    }  
                    break; // 假設(shè)我們只關(guān)心第一行  
                }  
            }  
            reader.close();  
        } catch (IOException e) {  
            e.printStackTrace();  
        }  
    }  
}

<dependency>  
    <groupId>oshi-project</groupId>  
    <artifactId>oshi-core</artifactId>  
    <version>我們的版本號</version>  
</dependency>

import oshi.SystemInfo;  
import oshi.hardware.CentralProcessor;  
public class CPULoadCheckerWithOshi {  
    public static void main(String[] args) {  
        SystemInfo si = new SystemInfo();  
        CentralProcessor cpu = si.getHardware().getProcessor();  
        // 獲取CPU的最近負(fù)載（過去1秒、5秒和15秒的負(fù)載）  
        double[] loadAverage = cpu.getSystemCpuLoadAverage(1, 5, 15);  
        System.out.println("CPU Load (1s): " + loadAverage[0] * 100 + "%");  
        System.out.println("CPU Load (5s): " + loadAverage[1] * 100 + "%");  
        System.out.println("CPU Load (15s): " + loadAverage[2] * 100 + "%");  
    }  
}