迭代Java中的所有文件 [英] Iterate through all files in Java

问题描述

我想让我的程序打印我的电脑上所有文件的巨大列表。我的问题是，它只打印文件从第一个硬盘驱动器的第一个文件夹，当我想要打印我的电脑上的所有文件。任何想法我在这里做错什么？谢谢。

I want to make my program print huge list of all files that I have on my computer. My problem is that it only prints files from first folder of the first hard-drive, when I want it to print all files located on my computer. Any ideas what am I doing wrong here? Thanks.

这里是我使用的代码：

主要：

import java.io.File;
import java.util.ArrayList;
import java.util.Arrays;

public class Main {

    public static void main(String[] args) {
        ArrayList<File> roots = new ArrayList();
        roots.addAll(Arrays.asList(File.listRoots()));


        for (File file : roots) {
            new Searcher(file.toString().replace('\\', '/')).search();
        }
    }
}

和Searcher类： p>

and Searcher class:

import java.io.File;

public class Searcher {

    private String root;

    public Searcher(String root) {
        this.root = root;
    }

    public void search() {
        System.out.println(root);
        File folder = new File(root);
        File[] listOfFiles = folder.listFiles();
        for (File file : listOfFiles) {
            String path = file.getPath().replace('\\', '/');
            System.out.println(path);
            if (!path.contains(".")) {
                new Searcher(path + "/").search();
            }
        }
    }
}

推荐答案

我刚刚尝试过，对我有用。我确实需要添加一个 null 检查并更改目录评估方法：

I just tried this and it worked for me. I did have to add one null check and changed the directory evaluation method though:

package test;

import java.io.File;
import java.util.ArrayList;
import java.util.Arrays;

public class Searcher {
    public static void main(String[] args) {
        ArrayList<File> roots = new ArrayList<File>();
        roots.addAll(Arrays.asList(File.listRoots()));


        for (File file : roots) {
            new Searcher(file.toString().replace('\\', '/')).search();
        }
    }

    private String root;

    public Searcher(String root) {
        this.root = root;
    }

    public void search() {
        System.out.println(root);
        File folder = new File(root);
        File[] listOfFiles = folder.listFiles();
        if(listOfFiles == null) return;  // Added condition check
        for (File file : listOfFiles) {
            String path = file.getPath().replace('\\', '/');
            System.out.println(path);
            if (file.isDirectory()) {
                new Searcher(path + "/").search();
            }
        }
    }
}

这篇关于迭代Java中的所有文件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！