java获得linux环境的硬盘、内存、cpu使用率

来源：互联网发布：b2轰炸机知乎编辑：程序博客网时间：2024/06/10 16:54
思路:java代码读取linux主机的磁盘使用信息，同时截取出文件系统和已使用情况放在map中可以得到keyvalue
package com.cmmb.util;import java.io.*;/**   * linux 下cpu 内存 磁盘 jvm的使用监控   * @author avery_leo   *   */  public class DiskSpace {    /**       * 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 /home");//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();         }                  //上面写在userd和total写反了，懒得改了，就反着用了        System.out.println("----totalhd----" + usedhd);        System.out.println("----usedhd----" + totalhd);        return (totalhd / usedhd) * 100;     } public static void main(String[] args) throws Exception {       DiskSpace cpu = new DiskSpace();           System.out.println("---------------cpu used:" + cpu.getcpuUsage() + "%");           System.out.println("---------------mem used:" + cpu.getMemUsage() + "%");           System.out.println("---------------HD used:" + cpu.getDeskUsage() + "%");           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());       } }
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