java检测磁盘空间

package study.disk;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Locale;

/**
* 检查磁盘空间是否可用的线程
* djk
*
*/
public class CheckDiskThread extends Thread
{

/**
* 获得当前操作系统的名称
*/
private static String osName = System.getProperty("os.name").toUpperCase(Locale.getDefault());

/**
* 系统用户所在分区默认剩余空间
*/
private static String diskAvail = "10240000";

/**
* 是否启动
*/
private boolean runFlag = true;
@Override
public void run()
{
if (!osName.startsWith("WINDOWS"))
{
while(runFlag)
{

BufferedReader breader = null;
String diskInfo = null;
String[] content = null;

try
{
sleep(1000);

String command = "df " + "/home/djk";

//执行查询磁盘空间命令
Process process = Runtime.getRuntime().exec(command);

//获得执行命令的输入流
breader = new BufferedReader(new InputStreamReader(process.getInputStream()));

//过滤无用信息
breader.readLine();

/**
* 离线文件目录磁盘分区信息
* 第一种情况:本地磁盘
* Filesystem           1K-blocks      Used Available Use% Mounted on
* /dev/sda2             20972152  18964652   2007500  91% /
*
* 第二种情况:挂载磁盘
* Filesystem           1K-blocks      Used Available Use% Mounted on
* 10.70.136.21:/home/umlog
*                        41944384  17026880  24917504  41% /home/downbilldir
*/
diskInfo = breader.readLine();

if (null != diskInfo)
{
content = diskInfo.split("\\s+");

//保证取到磁盘"可利用的"空间信息
while (null != content && content.length < 3)
{
diskInfo = breader.readLine();
if (null != diskInfo)
{
content = diskInfo.split("\\s+");
}
}
}
}
catch (InterruptedException e1)
{
e1.printStackTrace();
}
catch (IOException e)
{
e.printStackTrace();
}
finally
{
if (null != breader)
{
try
{
breader.close();
}
catch (IOException e)
{
}
}
}

if (null != content && content.length >= 3)
{
//设置实际的磁盘剩余空间大小
setDiskAvail(content[3]);
}

}
}else
{
System.out.println("not support windows os....");
}
}
public static String getDiskAvail() {
return diskAvail;
}
public static void setDiskAvail(String diskAvail) {
CheckDiskThread.diskAvail = diskAvail;
}

}