一般来讲要用java得到硬盘空间有种方法:
调用system的command然后分析得到的结果这种方法有很强的系统依赖性linux下和win下要分别写程序
下面是一个win下的例子编译成功之后运行java Diskspace yourdir(比如c:\)
import javaioBufferedReader;
import javaioInputStreamReader;
/**
* Determine free disk space for a given directory by
* parsing the output of the dir command
* This class is inspired by the code at
* Works only under Windows under certain circumstances
* Yes its that shaky
* Requires Java or higher
* @[EMAIL PROTECTED]
*Marco Schmidt
*/
public class Diskspace
{
private Diskspace()
{
// prevent instantiation of this class
}
/**
* Return available free disk space for a directory
* @[EMAIL PROTECTED]
dirName name of the directory
* @[EMAIL PROTECTED]
free disk space in bytes or if unknown
*/
public static long getFreeDiskSpace(String dirName)
{
try
{
// guess correct dir command by looking at the
// operating system name
String os = SystemgetProperty(osname);
String command;
if (osequals(Windows NT) ||
osequals(Windows ))
{
command = cmdexe /c dir + dirName;
}
else
{
command = /c dir + dirName;
}
// run the dir command on the argument directory name
Runtime runtime = RuntimegetRuntime();
Process process = null;
process = runtimeexec(command);
if (process == null)
{
return ;
}
// read the output of the dir command
// only the last line is of interest
BufferedReader in = new BufferedReader(
new InputStreamReader(processgetInputStream()));
String line;
String freeSpace = null;
while ((line = inreadLine()) != null)
{
freeSpace = line;
}
if (freeSpace == null)
{
return ;
}
processdestroy();
// remove dots & commas & leading and trailing whitespace
freeSpace = freeSpacetrim();
freeSpace = freeSpacereplaceAll(\\ );
freeSpace = freeSpacereplaceAll( );
String[] items = freeSpacesplit( );
// the first valid numeric value in items after(!) index
// is probably the free disk space
int index = ;
while (index < items.length)
{
try
{
long bytes = Long.parseLong(items[index++]);
return bytes;
}
catch (NumberFormatException nfe)
{
}
}
return -1;
}
catch (Exception exception)
{
return -1;
}
}
/**
* Command line program to print the free diskspace to stdout
* for all 26 potential root directories A:\ to Z:* (when no parameters are given to this program)
* or for those directories (drives) specified as parameters.
* @[EMAIL PROTECTED]
args program parameters
*/
public static void main(String[] args)
{
if (args.length == 0)
{
for (char c = 'A'; c <= 'Z'; c++)
{
String dirName = c + ":\\";
System.out.println(dirName + " " +
getFreeDiskSpace(dirName));
}
}
else
{
for (int i = 0; i < args.length; i++)
{
System.out.println(args[i] + " " +
getFreeDiskSpace(args[i]));
}
}
}
}
方法二:使用Jconfig,可以跨平台
从上下载jconfig.
下载的包的sample里有很简单的例子,如果是要得到磁盘空间的话:
用FileRegistry.getVolumes()得到DiskVolume
然后call getFreeSpace()和getMaxCapacity()
就是这么简单..:)
方法三:jni
这个是解决所有和os相关的操作的万能利器了.
例子我也懒得写了.
写一个dll然后call之即可.
