Get file date and time
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FilenameFilter;
import java.io.IOException;
import java.net.URL;
import java.util.ArrayList;
import java.util.Iterator;
/*
* IzPack - Copyright 2001-2008 Julien Ponge, All Rights Reserved.
*
* http://izpack.org/
* http://izpack.codehaus.org/
*
* Copyright 2005 Marc Eppelmann
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* Provides general global file utility methods
*
* @author marc.eppelmann
*/
class FileUtil
{
//~ Constructors ***********************************************************************
/**
* Creates a new FileUtil object.
*/
public FileUtil()
{
}
//~ Methods ****************************************************************************
/**
* Gets the content from a File as StringArray List.
*
* @param fileName A file to read from.
* @return List of individual line of the specified file. List may be empty but not
* null.
* @throws IOException
*/
public static ArrayList getFileContent(String fileName)
throws IOException
{
ArrayList result = new ArrayList();
File aFile = new File(fileName);
if (!aFile.isFile())
{
//throw new IOException( fileName + " is not a regular File" );
return result; // None
}
BufferedReader reader = null;
try
{
reader = new BufferedReader(new FileReader(aFile));
}
catch (FileNotFoundException e1)
{
// TODO handle Exception
e1.printStackTrace();
return result;
}
String aLine = null;
while ((aLine = reader.readLine()) != null)
{
result.add(aLine + "\n");
}
reader.close();
return result;
}
/**
* Searches case sensitively, and returns true if the given SearchString occurs in the
* first File with the given Filename.
*
* @param aFileName A files name
* @param aSearchString the string search for
* @return true if found in the file otherwise false
*/
public static boolean fileContains(String aFileName, String aSearchString)
{
return (fileContains(aFileName, aSearchString, false));
}
/**
* Tests if the given File contains the given Search String
*
* @param aFileName A files name
* @param aSearchString the String to search for
* @param caseInSensitiveSearch If false the Search is casesensitive
* @return true if found in the file otherwise false
*/
public static boolean fileContains(String aFileName, String aSearchString,
boolean caseInSensitiveSearch)
{
boolean result = false;
String searchString = caseInSensitiveSearch
? aSearchString.toLowerCase() : aSearchString;
ArrayList fileContent = new ArrayList();
try
{
fileContent = getFileContent(aFileName);
}
catch (IOException e)
{
// TODO handle Exception
e.printStackTrace();
}
Iterator linesIter = fileContent.iterator();
while (linesIter.hasNext())
{
String currentline = (String) linesIter.next();
if (caseInSensitiveSearch)
{
currentline = currentline.toLowerCase();
}
if (currentline.indexOf(searchString) > -1)
{
result = true;
break;
}
}
return result;
}
/**
* Gets file date and time.
*
* @param url The URL of the file for which date and time will be returned.
* @return Returns long value which is the date and time of the file. If any error
* occures returns -1 (=no file date and time available).
*/
public static long getFileDateTime(URL url)
{
if (url == null)
{
return -1;
}
String fileName = url.getFile();
if (fileName.charAt(0) == '/' || fileName.charAt(0) == '\\')
{
fileName = fileName.substring(1, fileName.length());
}
try
{
File file = new File(fileName);
// File name must be a file or a directory.
if (!file.isDirectory() && !file.isFile())
{
return -1;
}
return file.lastModified();
}
catch (java.lang.Exception e)
{ // Trap all Exception based exceptions and return -1.
return -1;
}
}
public static String[] getFileNames(String dirPath) throws Exception
{
return getFileNames(dirPath, null);
}
public static String[] getFileNames(String dirPath, FilenameFilter fileNameFilter) throws Exception
{
String fileNames[] = null;
File dir = new File(dirPath);
if (dir.isDirectory())
{
if (fileNameFilter != null)
{
fileNames = dir.list(fileNameFilter);
}
else
{
fileNames = dir.list();
}
}
return fileNames;
}
/**
* Test main
*
* @param args
*/
public static void main(String[] args)
{
}
}
Related examples in the same category
