/** * 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, it's that shaky. * Requires Java 1.4 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 -1 if unknown */ public static long getFreeDiskSpace(String dirName) { try { // guess correct 'dir' command by looking at the // operating system name String os = System.getProperty("os.name"); String command; if (os.equals("Windows NT") || os.equals("Windows 2000")) { command = "cmd.exe /c dir " + dirName; } else { command = "command.com /c dir " + dirName; } // run the dir command on the argument directory name Runtime runtime = Runtime.getRuntime(); Process process = null; process = runtime.exec(command); if (process == null) { return -1; } // read the output of the dir command // only the last line is of interest BufferedReader in = new BufferedReader( new InputStreamReader(process.getInputStream())); String line; String freeSpace = null; while ((line = in.readLine()) != null) { freeSpace = line; } if (freeSpace == null) { return -1; } process.destroy(); // remove dots & commas & leading and trailing whitespace freeSpace = freeSpace.trim(); freeSpace = freeSpace.replaceAll("\\.", ""); freeSpace = freeSpace.replaceAll(",", ""); String[] items = freeSpace.split(" "); // the first valid numeric value in items after(!) index 0 // is probably the free disk space int index = 1; 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])); } } } }
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 java.io.BufferedReader;
import java.io.InputStreamReader;
/**
* 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, it's that shaky.
* Requires Java 1.4 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 -1 if unknown
*/
public static long getFreeDiskSpace(String dirName)
{
try
{
// guess correct 'dir' command by looking at the
// operating system name
String os = System.getProperty("os.name");
String command;
if (os.equals("Windows NT") ||
os.equals("Windows 2000"))
{
command = "cmd.exe /c dir " + dirName;
}
else
{
command = "command.com /c dir " + dirName;
}
// run the dir command on the argument directory name
Runtime runtime = Runtime.getRuntime();
Process process = null;
process = runtime.exec(command);
if (process == null)
{
return -1;
}
// read the output of the dir command
// only the last line is of interest
BufferedReader in = new BufferedReader(
new InputStreamReader(process.getInputStream()));
String line;
String freeSpace = null;
while ((line = in.readLine()) != null)
{
freeSpace = line;
}
if (freeSpace == null)
{
return -1;
}
process.destroy();
// remove dots & commas & leading and trailing whitespace
freeSpace = freeSpace.trim();
freeSpace = freeSpace.replaceAll("\\.", "");
freeSpace = freeSpace.replaceAll(",", "");
String[] items = freeSpace.split(" ");
// the first valid numeric value in items after(!) index 0
// is probably the free disk space
int index = 1;
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http://www.tolstoy.com/samizdat/jconfig.html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..:)
调用WINDOWS命令和直接调用WINDOWS API又没社么区别~~
long totalSpace = 0L;
long freeSpace = 0L;
for (int i=0;i<File.listRoots().length;i++)
{
File file = new File(File.listRoots()[i]);
totalSpace += file.getTotalSpace();
freeSpace += file.getFreeSpace();
}
System.out.println((totalSpace-freeSpace)/totalSpace);
long totalSpace = 0L;
long freeSpace = 0L;
for (int i=0;i<File.listRoots().length;i++)
{
File file = File.listRoots()[i];
totalSpace += file.getTotalSpace();
freeSpace += file.getFreeSpace();
}
System.out.println((totalSpace-freeSpace)/totalSpace);
public static String getDiskUseRate() throws Exception{ String freeSize = null;
String totalSize = null;
String line;
String[] cmdarray = {Consts.DISKPATH + "disk.bat"};
Process process = Runtime.getRuntime().exec(cmdarray);
InputStream is = process.getInputStream();
BufferedReader br = new BufferedReader(new InputStreamReader(is));
while ((line = br.readLine()) != null) {
if(line.indexOf("FreeSpace")!=-1){
freeSize = line.substring(line.indexOf(":")+1).trim();
}else if(line.indexOf("TotalSize")!=-1){
totalSize = line.substring(line.indexOf(":")+1).trim();
}
}
double num = (Long.parseLong(totalSize) - Long.parseLong(freeSize) )/ (double)Long.parseLong(totalSize); DecimalFormat decimalFormat = new DecimalFormat("##.#%");
return (decimalFormat.format(num)); }
disk.bat里内容:
cscript c:\\disk.vbsdisk.vbs里内容:
Set objFSO = WScript.CreateObject("Scripting.FileSystemObject")
Set objDrive = objFSO.GetDrive("c")
WScript.Echo "FreeSpace : " & objDrive.FreeSpace
WScript.Echo "TotalSize : " & objDrive.TotalSize这样就解决了,谢谢各位了....结贴了