I know how how to find files in a folder using Java but how do you search for specific file types. I am looking only include files with the extension .txt in my search.
Apache Commons IO has a lot of nice file utilities, inluding listing files with wildwards.
Take a look here for an example on how to traverse a directory.
http://www.exampledepot.com/egs/java.io/TraverseTree.html
all you have to do after this is use String.endsWith(".txt"); once you have an array file names to process.
> I know how how to find files in a folder using Java
> but how do you search for specific file types. I am
> looking only include files with the extension .txt in
> my search.
Use a custom FileFilter. Here's a little demo:
File aFolder = new File("/home/userx");
// get all textfiles from /home/userx
File[] textFiles = aFolder.listFiles(new FileFilter() {
public boolean accept(File file) {
return file.getName().endsWith(".txt") && file.isFile();
}
});
What if I wanted to read the endsWith value from an XML file?
> What if I wanted to read the endsWith value from an XML file?
Then you adjust the example I posted earlier.
Sorry, what I meant was that instead of actually typing ".txt" into endsWith, the value is read from an XML such as:
<file>
<file_details>
<starts_with>A</starts_with>
<extension>.txt</extension>
</file_details>
</file>
Ah, then you'll have to parse the XML file:
http://java.sun.com/developer/Books/xmljava/ch03.pdf
Cheers. I already looked at that. Got a program that parses a XML and had a play about with it. Can print the contents of tags in my XML. Its just that im trying to parse my XML and have the contents of the starts_with tag to appear in startsWith(or a variable to which this has been assigned) and the contents of the extension tag to appear in endsWith. Totally clueless on how to go about it.
Below is my class. Would be greatful if you have any ideas.
import java.io.File;
public class FindLatestFile {
public static File getLatest(File thisDir){
long latestModDate = -1;
File latestFile = null;
File[] fileList = thisDir.listFiles();
for(int i=0; i < fileList.length; i++){
File file = fileList[i];
if (file.lastModified() > latestModDate & (file.getName().startsWith("A") & file.getName().endsWith(".txt"))) {
latestModDate = file.lastModified();
latestFile = file;
}
}
return latestFile;
}
}
