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 | package com.huawei.classroom.student.h57;
 import java.io.File;
 
 
 
 
 public class FileTool {
 private long sum = 0;
 
 
 
 
 public long recursiveCalcFileSize(String homeDir) {
 File home = new File(homeDir);
 calcFiles(home);
 return sum;
 }
 
 private void calcFiles(File dir) {
 if (!dir.exists() || !dir.isDirectory()) {
 return;
 }
 String[] files = dir.list();
 if (files == null) {
 return;
 }
 for (String s : files) {
 File file = new File(dir, s);
 if (file.isFile()) {
 sum += file.length();
 } else {
 calcFiles(file);
 }
 }
 }
 }
 
 |