Java获取Linux下的系统信息
import java.io.*;/** * linux 下cpu 内存 磁盘 jvm的使用监控 * @author avery_leo * */public class TT {/** * 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(RedHatcpuUsed += 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;int flag = 0;while ((str = in.readLine()) != null) {int m = 0;//if (flag > 0) {//flag++;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;}public static void main(String[] args) throws Exception {TT cpu = new TT();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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