java - 获取目录和子目录中所有txt文件的列表并将其添加到List中

Question

尝试获取目录/子目录中所有文本文件的列表并将其添加到列表中

结构:

sampleDirFolder->testDirFolder->test.txt,test1.txt

代码:

import java.io.File;
import java.io.IOException;
import java.util.*;

public class testClass {

//Method to read dir/sub-dir and get list of .java files
public static List<String> listFiles(String path)

{
    File folder = new File(path);
    File[] files = folder.listFiles();
    for (File file : files)
    { if (file.isFile() && file.getName().endsWith(".txt"))
    {
        System.out.println(file.getName());
    }
    else if (file.isDirectory())
    {
        listFiles(file.getAbsolutePath());
    }
    }
    return listOfFiles;
}

public static void main(String [] args) throws IOException {
    listFiles("path/Desktop/sampledir");
}
}

操作:

test.txt
test1.txt

此代码适用于打印文件列表，有关如何将其添加到 List<String> 的任何建议

Answer 1

试试这个:

import java.io.File;
import java.io.IOException;
import java.util.*;

public class testClass {

//Method to read dir/sub-dir and get list of .java files
public static void listFiles(String path, List<String> filesList)

{
    File folder = new File(path);
    File[] files = folder.listFiles();
    for (File file : files)
    { if (file.isFile() && file.getName().endsWith(".txt"))
    {
        //System.out.println(file.getName());
        filesList.add(file.getName());
    }
    else if (file.isDirectory())
    {
        listFiles(file.getAbsolutePath(), filesList);
    }
    }
    //return listOfFiles;
}

public static void main(String [] args) throws IOException {
    List<String> filesList = new ArrayList<>();
    listFiles("path/Desktop/sampledir", filesList);
    System.out.println(filesList);
}
}