JAVA 调用LINUX命令类

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原创最新推荐文章于 2026-04-18 18:32:58 发布 2.7k 阅读 AI 写同款· GEO 优化 ›
Linux下C++调用Java简单实例（jni） 1. Java端，假设工作目录为/home 1) z 阅读详情
这个是我写的系统采集类实现了CPU个数，CPU频率，内存信息，磁盘信息，CPU利用率，内存利用率，磁盘利用率，系统启动时间的获得
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package com.fenghuo.jsnmp.logic.task;
import java.io.*;
import java.util.StringTokenizer;
/**
 * 用于执行linux命令 
 * @author huangxf
 *
 */
public class LinuxExec {
    /**
     * 获取cpu使用情况
     * @return
     * @throws Exception
     */
    public double getCpuUsage() throws Exception {
        double cpuUsed = 0;
        Runtime rt = Runtime.getRuntime();
        Process p = rt.exec("top -b -n 1");// 调用系统的“top"命令 
        BufferedReader in = null;
        try {
            in = new BufferedReader(new InputStreamReader(p.getInputStream()));
            String str = null;
            String[] strArray = null;
            while ((str = in.readLine()) != null) {
                int m = 0;
                if (str.indexOf(" R ") != -1) {// 只分析正在运行的进程，top进程本身除外 && 
                    strArray = str.split(" ");
                    for (String tmp : strArray) {
                        if (tmp.trim().length() == 0) {
                            continue;
                        }
                        if (++m == 9) {// 第9列为CPU的使用百分比(RedHat 
                            cpuUsed += Double.parseDouble(tmp);
                        }
                    }
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            in.close();
        }
        return cpuUsed;
    }
    /**
     * 内存监控
     * @return
     * @throws Exception
     */
    public double getMemUsage() throws Exception {
        double menUsed = 0;
        Runtime rt = Runtime.getRuntime();
        Process p = rt.exec("top -b -n 1");// 调用系统的“top"命令 
        BufferedReader in = null;
        try {
            in = new BufferedReader(new InputStreamReader(p.getInputStream()));
            String str = null;
            String[] strArray = null;
            while ((str = in.readLine()) != null) {
                int m = 0;
                if (str.indexOf(" R ") != -1) {// 只分析正在运行的进程，top进程本身除外 && 
                    //  
                    // System.out.println("------------------3-----------------"); 
                    strArray = str.split(" ");
                    for (String tmp : strArray) {
                        if (tmp.trim().length() == 0) {
                            continue;
                        }
                        if (++m == 10) {
                            // 9)--第10列为mem的使用百分比(RedHat 9) 
                            menUsed += Double.parseDouble(tmp);
                        }
                    }
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            in.close();
        }
        return menUsed;
    }
    /**
     * 获取磁盘空间大小
     * 
     * @return
     * @throws Exception
     */
    public double getDeskUsage() throws Exception {
        double totalHD = 0;
        double usedHD = 0;
        Runtime rt = Runtime.getRuntime();
        Process p = rt.exec("df -hl");//df -hl 查看硬盘空间 
        BufferedReader in = null;
        try {
            in = new BufferedReader(new InputStreamReader(p.getInputStream()));
            String str = null;
            String[] strArray = null;
            while ((str = in.readLine()) != null) {
                int m = 0;
                strArray = str.split(" ");
                for (String tmp : strArray) {
                    if (tmp.trim().length() == 0) {
                        continue;
                    }
                    ++m;
//          System.out.println("----tmp----" + tmp); 
                    if (tmp.indexOf("G") != -1) {
                        if (m == 2) {
//                          System.out.println("---G----" + tmp); 
                            if (!tmp.equals("") && !tmp.equals("0")) {
                                totalHD += Double.parseDouble(tmp.substring(0, tmp.length() - 1)) * 1024;
                            }
                        }
                        if (m == 3) {
//                          System.out.println("---G----" + tmp); 
                            if (!tmp.equals("none") && !tmp.equals("0")) {
                                usedHD += Double.parseDouble(tmp.substring(
                                        0, tmp.length() - 1)) * 1024;
                            }
                        }
                    }
                    if (tmp.indexOf("M") != -1) {
                        if (m == 2) {
//                          System.out.println("---M---" + tmp); 
                            if (!tmp.equals("") && !tmp.equals("0")) {
                                totalHD += Double.parseDouble(tmp.substring(0, tmp.length() - 1));
                            }
                        }
                        if (m == 3) {
//                          System.out.println("---M---" + tmp); 
                            if (!tmp.equals("none") && !tmp.equals("0")) {
                                usedHD += Double.parseDouble(tmp.substring(
                                        0, tmp.length() - 1));
                            // System.out.println("----3----" + usedHD); 
                            }
                        }
                    }
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            in.close();
        }
        return (usedHD / totalHD) * 100;
    }
    /**
     * 获得CPU的个数
     * @return
     * @throws java.lang.Exception
     */
    public int getIntCpuNum() throws Exception {
        int rs = 0;
        Runtime rt = Runtime.getRuntime();
//        Process p = rt.exec("cat /proc/cpuinfo | grep processor | wc -l");//获得CPU个数 
        Process p = rt.exec("cat /proc/cpuinfo");//获得CPU个数 
        BufferedReader in = null;
        try {
            in = new BufferedReader(new InputStreamReader(p.getInputStream()));
            String str = null;
            String[] strarr = null;
            while ((str = in.readLine()) != null) {
                strarr = str.split(":");
                if (strarr[0].trim().equals("processor")) {
                    rs = Integer.valueOf(strarr[1].trim())+1;
                }
            }
//            String str = in.readLine(); 
//            System.out.println("============================================"); 
//            System.out.println(str); 
//            str = str.trim(); 
//            System.out.println(str); 
//            System.out.println("============================================"); 
//            rs = Integer.valueOf(str); 
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            in.close();
        }
        return rs;
    }
    /**
     * 获得内存的大小
     * @return
     * @throws java.lang.Exception
     */
    public int getIntMemMax() throws Exception {
        int rs = 0;
        Runtime rt = Runtime.getRuntime();
//        Process p = rt.exec("cat /proc/meminfo|grep -i /"^memtotal/"|cut -d/":/" -f2|cut -d/"k/" -f1");//获得内存大小 
        Process p = rt.exec("cat /proc/meminfo");//获得内存大小 
        BufferedReader in = null;
        try {
            in = new BufferedReader(new InputStreamReader(p.getInputStream()));
            int[] result = new int[4];
            String str = null;
            StringTokenizer token = null;
            while ((str = in.readLine()) != null) {
                token = new StringTokenizer(str);
                if (!token.hasMoreTokens()) {
                    continue;
                }
                str = token.nextToken();
                if (!token.hasMoreTokens()) {
                    continue;
                }
                if (str.equalsIgnoreCase("MemTotal:")) {
                    result[0] = Integer.parseInt(token.nextToken());
                    rs = result[0];
                } else if (str.equalsIgnoreCase("MemFree:")) {
                    result[1] = Integer.parseInt(token.nextToken());
                } else if (str.equalsIgnoreCase("SwapTotal:")) {
                    result[2] = Integer.parseInt(token.nextToken());
                } else if (str.equalsIgnoreCase("SwapFree:")) {
                    result[3] = Integer.parseInt(token.nextToken());
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            in.close();
        }
        return rs / 1000;
    }
    /**
     * 获得的CPUHMZ
     * @return
     * @throws java.lang.Exception
     */
    public int getIntCpuHMZ() throws Exception {
        int cpuhmz = 0;
        Runtime rt = Runtime.getRuntime();
        Process p = rt.exec("cat /proc/cpuinfo ");//读CPU信息文件 
        BufferedReader in = null;
        try {
            in = new BufferedReader(new InputStreamReader(p.getInputStream()));
            String str = null;
            String[] strarr = null;
            while ((str = in.readLine()) != null) {
                strarr = str.split(":");
                if (strarr.length > 0) {
                    if (strarr[0].trim().equals("cpu MHz")) {
                        cpuhmz = Double.valueOf(strarr[1].trim()).intValue();
                    }
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            in.close();
        }
        return cpuhmz;
    }
    /**
     * 获取磁盘空间大小(总)
     * 
     * @return
     * @throws Exception
     */
    public int getDeskAll() throws Exception {
        double totalHD = 0;
        Runtime rt = Runtime.getRuntime();
        Process p = rt.exec("df -hl");//df -hl 查看硬盘空间 
        BufferedReader in = null;
        try {
            in = new BufferedReader(new InputStreamReader(p.getInputStream()));
            String str = null;
            String[] strArray = null;
            while ((str = in.readLine()) != null) {
                int m = 0;
                strArray = str.split(" ");
                for (String tmp : strArray) {
                    if (tmp.trim().length() == 0) {
                        continue;
                    }
                    ++m;
//          System.out.println("----tmp----" + tmp); 
                    if (tmp.indexOf("G") != -1) {
                        if (m == 2) {
//              System.out.println("---G----" + tmp); 
                            if (!tmp.equals("") && !tmp.equals("0")) {
                                totalHD += Double.parseDouble(tmp.substring(0, tmp.length() - 1)) * 1024;
                            }
                        }
                        if (m == 3) {
//              System.out.println("---G----" + tmp); 
                        }
                    }
                    if (tmp.indexOf("M") != -1) {
                        if (m == 2) {
//              System.out.println("---M---" + tmp); 
                            if (!tmp.equals("") && !tmp.equals("0")) {
                                totalHD += Double.parseDouble(tmp.substring(0, tmp.length() - 1));
                            }
                        }
                        if (m == 3) {
//              System.out.println("---M---" + tmp); 
                        }
                    }
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            in.close();
        }
        Double d = new Double(totalHD);
        return d.intValue();
    }
    /**
     * 查询系统时间
     * @return
     * @throws java.io.IOException
     */
    public long getSysStartTime() throws IOException, InterruptedException {
        long statime = 0;
        Runtime rt = Runtime.getRuntime();
        Process p = rt.exec("uptime");//查看系统启动时间 
//        System.out.println(p.exitValue()); 
//        p.waitFor(); 
        BufferedReader in = null;
        try {
            in = new BufferedReader(new InputStreamReader(p.getInputStream()));
            String str = in.readLine();
            String[] strs = str.split(",");
            String[] rss = strs[1].trim().split(" ");
            if (rss.length == 1) {
                String[] times = rss[0].split(":");
                int hour = Integer.valueOf(times[0]);
                int min = Integer.valueOf(times[1]);
                statime = (hour * 60 + min) * 60 * 1000;
            } else if (rss.length == 2) {
                int min = Integer.valueOf(rss[0]);
                statime = min * 60 * 1000;
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            in.close();
        }
        return statime;
    }
    public void shutdownh() throws IOException {
        Runtime rt = Runtime.getRuntime();
        Process p = rt.exec("shutdown -h");
    }
    public void shutdownr() throws IOException {
        Runtime rt = Runtime.getRuntime();
        Process p = rt.exec("shutdown -r");
    }
    public static void main(String[] args) throws Exception {
        LinuxExec cpu = new LinuxExec();
        System.out.println("---------------cpu used:" + cpu.getCpuUsage() + "%");
        System.out.println("---------------mem used:" + cpu.getMemUsage() + "%");
        System.out.println("---------------HD used:" + cpu.getDeskUsage() + "%");
        System.out.println("---------------CPU NUM:" + cpu.getIntCpuNum());
        System.out.println("---------------CPU HMZ:" + cpu.getIntCpuHMZ());
        System.out.println("---------------MEN MAX:" + cpu.getIntMemMax());
        System.out.println("---------------DISK MAX:" + cpu.getDeskAll());
        System.out.println("---------------STARTTIME:" + cpu.getSysStartTime());
        System.out.println("------------jvm监控----------------------");
        Runtime lRuntime = Runtime.getRuntime();
        System.out.println("--------------Free Momery:" + lRuntime.freeMemory() + "K");
        System.out.println("--------------Max Momery:" + lRuntime.maxMemory() + "K");
        System.out.println("--------------Total Momery:" + lRuntime.totalMemory() + "K");
        System.out.println("---------------Available Processors :" + lRuntime.availableProcessors());
    }
}