第一章 Java編程獲取硬盤空間
因為論壇有人問到這個問題，所以就寫了這篇文章。希望對大家有所幫助。
一般來講,要用java得到硬盤空間,有3種方法:
1. 調用system的command,然後分析得到的結果,這種方法有很強的係統依賴性,linux下和win下要分別寫程序。
下麵是一個win下的例子,編譯成功之後,運行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)