jvm

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(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;
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());
}
}