知识大全 用JAVA得到硬盘空间的三种不同方法
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一般来讲 要用java得到硬盘空间 有 种方法: 调用system的mand 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 java io BufferedReader; import java io InputStreamReader; /** * Determine free disk space for a given directory by * parsing the output of the dir mand * This class is inspired by the code at * Works only under Windows under certain circumstances * Yes it s 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 mand by looking at the // operating system name String os = System getProperty( os name ); String mand; if (os equals( Windows NT ) || os equals( Windows )) mand = cmd exe /c dir + dirName; else mand = /c dir + dirName; // run the dir mand on the argument directory name Runtime runtime = Runtime getRuntime(); Process process = null; process = runtime exec(mand); if (process == null) return ; // read the output of the dir mand // 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 ; process destroy(); // remove dots & mas & 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 // 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 ; catch (Exception exception) return ; /** * Command line program to print the free diskspace to stdout * for all 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 == ) for (char c = A ; c <= Z ; c++) String dirName = c + :\\\\ ; System out println(dirName + + getFreeDiskSpace(dirName)); else for (int i = ; 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 cha138/Article/program/Java/Javascript/201311/25268相关参考