我已经创建了一些删除文件夹中所有文件的代码,问题是虽然这很好,我希望能够删除目录中的所有文件,但保留文件夹完整,所以我没有进入每个文件夹并删除其中的文件,这是我当前的代码:
@ViewScoped
@ManagedBean
public class Delete {
public void DeleteFiles() throws IOException {
System.out.println("Called deleteFiles");
File file = new File("D:/Documents/NetBeansProjects/printing~subversion/fileupload/web/resources/pdf/up617648/");
String[] myFiles;
if (file.isDirectory()) {
myFiles = file.list();
for (int i = 0; i < myFiles.length; i++) {
File myFile = new File(file, myFiles[i]);
System.out.println(myFile);
myFile.delete();
}
DeleteFiles2();
}
}
public void DeleteFiles2() throws IOException {
System.out.println("Called deleteFiles2");
File file = new File("D:/Documents/NetBeansProjects/printing~subversion/fileupload/Uploaded/up617648/");
String[] myFiles;
if (file.isDirectory()) {
myFiles = file.list();
for (int i = 0; i < myFiles.length; i++) {
File myFile = new File(file, myFiles[i]);
System.out.println(myFile);
myFile.delete();
}
}
}
}
如何修改我的代码以实现此目标?
编辑:
我已将代码更改为:
@ViewScoped
@ManagedBean
public class Delete {
public void DeleteFiles() throws IOException {
System.out.println("Called deleteFiles");
File file = new File("D:/Documents/NetBeansProjects/printing~subversion/fileupload/web/resources/pdf/");
String[] myFiles;
if (file.isDirectory()) {
myFiles = file.list();
for (int i = 0; i < myFiles.length; i++) {
File myFile = new File(file, myFiles[i]);
System.out.println(myFile);
if (!myFile.isDirectory()) {
myFile.delete();
}
}
DeleteFiles2();
}
}
虽然这会调用所有文件夹,但这是我的控制台:
INFO: Called deleteFiles
INFO: D:\Documents\NetBeansProjects\printing~subversion\fileupload\web\resources\pdf\cam01342
INFO: D:\Documents\NetBeansProjects\printing~subversion\fileupload\web\resources\pdf\geg00061
INFO: D:\Documents\NetBeansProjects\printing~subversion\fileupload\web\resources\pdf\null
INFO: D:\Documents\NetBeansProjects\printing~subversion\fileupload\web\resources\pdf\up617648
INFO: D:\Documents\NetBeansProjects\printing~subversion\fileupload\web\resources\pdf\up626088
INFO: Called deleteFiles2
Tt不会删除这些文件夹中的文件,我该怎么做?
编辑3:使用递归我现在收到堆栈溢出错误。
这是我的代码:
public void DeleteFiles() {
File file = new File("D:/Documents/NetBeansProjects/printing~subversion/fileupload/web/resources/pdf/");
System.out.println("Called deleteFiles");
if (file.isDirectory()) {
for (File f : file.listFiles()) {
DeleteFiles();
}
} else {
file.delete();
}
}
答案 0 :(得分:11)
为什么不做呢
if (!myFile.isDirectory()) myFile.delete();
而不是
myFile.delete();
答案 1 :(得分:3)
只需使用File.isDirectory()
。
只检查它是文件还是目录。如果它是文件然后删除它,否则留下它
在你的情况下
if (!(myFile.isDirectory()))
{
myFile.delete();
}
答案 2 :(得分:3)
我认为这样做
public void deleteFiles(File folder) throws IOException {
List<File> files = folder.listFiles()
foreach(File file: files){
if(file.isFile()){
file.delete();
}else if(file.isDirecotry()) {
deleteFiles(file)
}
}
}
然后你需要致电deleteFiles(new File("D:/Documents/NetBeansProjects/printing~subversion/fileupload/web/resources/pdf/"))
;
答案 3 :(得分:3)
使用递归非常整洁; - )
private void deleteFiles(File file) {
if (file.isDirectory())
for (File f : file.listFiles())
deleteFiles(f);
else
file.delete();
}
答案 4 :(得分:1)
递归是过度的,因为需要后续问题这一事实证明了这一点。在那里查看我的答案更简单:
答案 5 :(得分:0)
您可以使用以下方法。
public void deleteFiles(File folder) throws IOException {
File[] files = folder.listFiles();
for(File file: files){
if(file.isFile()){
String fileName = file.getName();
boolean del= file.delete();
System.out.println(fileName + " : got deleted ? " + del);
}else if(file.isDirectory()) {
deleteFiles(file);
}
}
}