java可以检查硬盘大小吗？

[[小文]]

如题java可以得到硬盘大小吗？可以得到硬盘剩余容量吗？

[龙四]

纯java不可以

[宅男小何]

可以执行cmd命令啊、。。。

[yktd26]

windows

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]));
　　　}
　　}
　}
}

[dahai1987102]

批处理，不错的想法

[「已注销」]

java.io.File

getTotalSpace
public long getTotalSpace()返回此抽象路径名指定的分区大小

getFreeSpace
public long getFreeSpace()返回此抽象路径名指定的分区中未分配的字节数。

listRoots
public static File[] listRoots()列出可用的文件系统根。

遍历所有逻辑磁盘，然后获取每个磁盘的总大小及剩余大小
相加即可

since JDK 1.6

[zuoguodang]

[Quote=引用 5 楼 redduke1202 的回复:]
java.io.File

getTotalSpace
public long getTotalSpace()返回此抽象路径名指定的分区大小

getFreeSpace
public long getFreeSpace()返回此抽象路径名指定的分区中未分配的字节数。

listRoots
public static File[] listRoots()列出可用的文件系统根。

……
[/Quote]
这个是可以的

[z_free]

[Quote=引用 5 楼 redduke1202 的回复:]
java.io.File

getTotalSpace
public long getTotalSpace()返回此抽象路径名指定的分区大小

getFreeSpace
public long getFreeSpace()返回此抽象路径名指定的分区中未分配的字节数。

listRoots
public static File[] listRoots()列出可用的文件系统根。

……
[/Quote]
支持5楼

[cyuan09]

用JNI吧

[[小文]]

jdk1.5能够得到硬盘大小吗？

[火龙果被占用了]

[Quote=引用 9 楼 dexter701 的回复:]

jdk1.5能够得到硬盘大小吗？
[/Quote]

不能！

[luozhangwen]

[Quote=引用 3 楼 yktd26 的回复:]
…
[/Quote]

稍微修改了下.

package com.lzw;

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") || os.equals("Windows XP"))
            {
                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]));
            }
        }
    }

}

[lognic10]

我也加个简单的吧

import java.io.*;

public class TestRootSpace{
	static long total = 0;
	public static void main(String[] args){
		File[] roots = File.listRoots();
		File f;
		
		for(int i=0;i<roots.length;i++){
			f = roots[i];
			System.out.print("盘符：" + f);
			System.out.print("\t总大小：" + f.getTotalSpace()/(1024*1024*1024) + "GB\t");
			System.out.print("剩余大小：" + f.getFreeSpace()/(1024*1024*1024) + "GB");
			System.out.println();
			total += f.getTotalSpace();
		}
		System.out.print("硬盘总大小：");
		System.out.println(total/(1024*1024*1024) + "GB");
	}
}