Author: jackliu
Email: suntoday@eyou.com
When you install JDK, in the JDK class library, there is a standard File class. Through this class, you can easily browse the functions of various file systems.
File class:
Java.lang.object
|
- java.io.file
The FILE class extends the Object object, implements the interface of Serializable, Comparable definition, can make a variety of operations on the JVM on an instance of File, and I have written a FileViewer class, which will list a list through the Iterator class. Realize iterative operations
FileViewer.java
Import java.io.file;
Import java.util.date;
Import java.util.iterator;
Import java.util.vector;
Public class fileviewer {
File mydir;
File [] contents;
Vector vectorList;
Iterator currentfileView;
File Currentfile;
String path;
Public FileViewer () {
Path = new string ("");
VectorList = new vector ();
}
Public FileViewer (String path) {
THIS.PATH = PATH;
VectorList = new vector ();
}
/ **
* Set the path to the browse
* /
Public void setpath (string path) {
THIS.PATH = PATH;
}
/ ***
* Return to the current directory path
* /
Public string getdirectory () {
Return mydir.getpath ();
}
/ **
* refresh the list
* /
Public void refreshlist () {
IF (this.path.equals (")) PATH =" C: // ";
mydir = new file (path);
VectorList.clear ();
CONTENTS = MyDir.listfiles ();
// Replace the path under the path
For (int i = 0; i
VectorList.Add (Contents [i]);
}
CurrentFileView = VectorList.ITerator ();
}
/ **
* Move the pointer to the current file collection points to the next entry
* @Return successfully returns true, otherwise false
* /
Public boolean nextfile () {
While (currentfileview.hasnext ()) {
Currentfile = (file) currentfileView.next ();
Return True;
}
Return False;
}
/ **
* Return to the file name of the file object pointing
* /
Public string getFileName () {
Return CurrentFile.getName ();
}
/ **
* Return to the file size of the currently pointing file object
* /
Public string getFilesize () {
Return new long (currentfile.length ()). TOSTRING ();
}
/ **
* Returns the last modification date of the current pointing file object
* /
Public string getFiletimeStamp () {
Return New Date (currentfile.lastmodified ()). Tostring ();
/ **
* Return to whether the current pointing file object is a file directory
* /
Public Boolean getFileType () {
Return Currentfile.Indirectory ();
}
}
Set the directory to be browsed by setPath () method (note if the operating system is a Microsoft operating system, each path separator should be written into two slashes //), the nextfile () method is used to move the list record, which can pass GetFileName ) Get file or folder name, get the file size via getFileSize (), to get the final modification time of the file via getFileTimeStamp (), and determine whether it is a file directory via getFileType ().
Write a Test example to test this FileViewer class
Test.java
Import java.io. *;
Public class test {
Public static void main (String [] args) {
System.out.println ("File List");
FileViewer f = new fileviewer ();
F.SetPath ("D: //");
F.Refreshlist ();
While (f.nextfile ()) {
System.out.print (f.GetFileName ());
IF (! f.Getfiletype ())
System.out.print (" f.GetFileSize ());
Else
System.out.print ("
");
System.out.print (f.GetFiletimeStamp () "/ n");
}
}
}
Package download code
