JAVA遍历一个文件夹中的所有文件---(递归)

public void traverseFolder2(String path) {

File file = new File(path);        

if (file.exists()) {

File[] files = file.listFiles();            

if (null == files || files.length == 0) {

System.out.println("文件夹是空的!");                

return;

} else {                

for (File file2 : files) {                    

if (file2.isDirectory()) {

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

traverseFolder2(file2.getAbsolutePath());

} else {

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

}

}

}

} else {

System.out.println("文件不存在!");

}

}

扩展资料

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);                    

foldeNum++;

} else {

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

fileNum++;

}

}

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);

folderNum++;

} else {

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

fileNum++;

}

}

}

} else {

System.out.println("文件不存在!");

}

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

}

参考资料：百度百科 Java

import java.io.File;
public class Test {
public static void main(String[] args) throws Exception {
//递归显示C盘下所有文件夹及其中文件
File root = new File("c:");
showAllFiles(root);
}

final static void showAllFiles(File dir) throws Exception{
File[] fs = dir.listFiles();
for(int i=0; i System.out.println(fs[i].getAbsolutePath());
if(fs[i].isDirectory()){
try{
showAllFiles(fs[i]);
}catch(Exception e){}
}
}
}
}

private static ArrayList filelist = new ArrayList();

public static void main(String[] args) {
refreshFileList("c:\\java");
}
public static void refreshFileList(String strPath) {
File dir = new File(strPath);
File[] files = dir.listFiles();

if (files == null)
return;
for (int i = 0; i < files.length; i++) {
if (files[i].isDirectory()) {
refreshFileList(files[i].getAbsolutePath());
} else {
String strFileName = files[i].getAbsolutePath().toLowerCase();
System.out.println("---"+strFileName);
filelist.add(files[i].getAbsolutePath());
}
}
}
}

你想做什么？

jdk那个文件有个，你看看，是demo那个文件夹