java file获取目录硬盘己用空间与可用空间代码

获取指定目录空间大小

import java.io.File;

public class SpaceChecker {
public static void main(String[] args) {
    File[] roots = File.listRoots();

    for (int i = 0; i < roots.length; i++) {
      System.out.println(roots[i]);
      System.out.println("Free space = " + roots[i].getFreeSpace());
      System.out.println("Usable space = " + roots[i].getUsableSpace());
      System.out.println("Total space = " + roots[i].getTotalSpace());
      System.out.println();
    }
}
}

获取目录空间

import java.io.File;

public class SpaceChecker {
public static void main(String[] args) {
    File[] roots = File.listRoots();

    for (int i = 0; i < roots.length; i++) {
      System.out.println(roots[i]);
      System.out.println("Free space = " + roots[i].getFreeSpace());
      System.out.println();
    }
}
}

获取使用空间

import java.io.File;

public class SpaceChecker {
public static void main(String[] args) {
    File[] roots = File.listRoots();

    for (int i = 0; i < roots.length; i++) {
      System.out.println(roots[i]);
      System.out.println("Usable space = " + roots[i].getUsableSpace());
      System.out.println();
    }
}
}

获取总空间

import java.io.File;

public class SpaceChecker {
public static void main(String[] args) {
    File[] roots = File.listRoots();

    for (int i = 0; i < roots.length; i++) {
      System.out.println(roots[i]);
      System.out.println("Total space = " + roots[i].getTotalSpace());
      System.out.println();
    }
}
}

补充：Jsp教程,Java技巧及代码