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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); } } } }
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