R语言读取文件夹里的全部文件失败怎么解决，Permission denied

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R语言读取文件夹里的全部文件失败怎么解决，Permission denied,第1张

JAVA 遍历文件夹下的所有文件(递归调用和非递归调用)

1.不使用递归的方法调用。

public void traverseFolder1(String path) {

int fileNum = 0, folderNum = 0

File file = new File(path)

if (file.exists()) {

LinkedList<File>list = new LinkedList<File>()

File[] files = file.listFiles()

for (File file2 : files) {

if (file2.isDirectory()) {

System.out.println("文件夹:" + file2.getAbsolutePath())

list.add(file2)

fileNum++

} else {

System.out.println("文件:" + file2.getAbsolutePath())

folderNum++

}

}

File temp_file

while (!list.isEmpty()) {

temp_file = list.removeFirst()

files = temp_file.listFiles()

for (File file2 : files) {

if (file2.isDirectory()) {

System.out.println("文件夹:" + file2.getAbsolutePath())

list.add(file2)

fileNum++

} else {

System.out.println("文件:" + file2.getAbsolutePath())

folderNum++

}

}

}

} else {

System.out.println("文件不存在!")

}

System.out.println("文件夹共有:" + folderNum + ",文件共有:" + fileNum)

}

JAVA 遍历文件夹下的所有文件(递归调用和非递归调用)

1.不使用递归的方法调用。

public void traverseFolder1(String path) {

int fileNum = 0, folderNum = 0

File file = new File(path)

if (file.exists()) {

LinkedList list = new LinkedList()

File[] files = file.listFiles()

for (File file2 : files) {

if (file2.isDirectory()) {

System.out.println("文件夹:" + file2.getAbsolutePath())

list.add(file2)

fileNum++

} else {

System.out.println("文件:" + file2.getAbsolutePath())

folderNum++

}

}

File temp_file

while (!list.isEmpty()) {

temp_file = list.removeFirst()

files = temp_file.listFiles()

for (File file2 : files) {

if (file2.isDirectory()) {

System.out.println("文件夹:" + file2.getAbsolutePath())

list.add(file2)

fileNum++

} else {

System.out.println("文件:" + file2.getAbsolutePath())

folderNum++

}

}

}

} else {

System.out.println("文件不存在!")

}

System.out.println("文件夹共有:" + folderNum + ",文件共有:" + fileNum)

}