获取文件夹大小

public class Test {public static void main(String[] args) {System.out.println(getFileSize(new File("d:/android")));}public static long getFileSize(File file) {long size = 0;File[] files = file.listFiles();for (File f : files) {if (f.isDirectory()) {size = size + getFileSize(f);} else {size = size + f.length();}}return size;}}