Another option is that you can copy files by date modified. If you want copy files that their date modified is equal to your date input, write 0 for comparison parameter. By writing -1 for the comparison parameter, files with dates modified greater than your date input are copied. In contrast, writing 1 for the comparison parameter is to copy files that have dates modifies less than the date input.
FileCopy source code:
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.FilenameFilter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Scanner;
import java.util.Date;
import org.joda.time.LocalDate;
public class FileCopy{
public static void main(String[] args){
System.out.println("........EASY FILES COPY......");
startProgram();
}
public static void copyFileByExt(){
try{
//create text reader to read text from keyboard
BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
//allow source directory input
System.out.println("Enter source directory:");
String from_dir=br.readLine();
//create file object to encapsulate the source directory
File fromDir=new File(from_dir);
//check source directory existence
if(!fromDir.exists())
{
System.out.println("Source directory deos not exist.");
System.exit(-1);
}
//allow destination directory input
System.out.println("Enter destination directory:");
String to_dir=br.readLine();
//create file object to encapsulate the source directory
File toDir=new File(to_dir);
if(!toDir.exists())
toDir.mkdir();
//allow file extension input
System.out.println("Enter file extension:");
String ext=br.readLine();
if(ext!=""){
String[] files;
if(ext.equals("*."))
files=fromDir.list(); //select all files
else
files=fromDir.list(new ExtFilter(ext)); //select only files of specified extension
System.out.println("Please wait...");
for(String s:files){
File myfile=new File(fromDir+"/"+s);
if(myfile.isFile()){
System.out.println("Copying "+fromDir+"/"+s+" to "+to_dir);
copy(fromDir+"/"+s,toDir+"/"+s);
}
}
System.out.println("Compy completed.");
}
}catch(IOException ie){ie.printStackTrace();}
}
public static void copyFileByModifyDate(){
try{
//create text reader to read text from keyboard
BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
//allow source directory input
System.out.println("Enter source directory:");
String from_dir=br.readLine();
//create file object to encapsulate the source directory
File fromDir=new File(from_dir);
//checking source directory existence
if(!fromDir.exists())
{
System.out.println("Source directory deos not exist.");
System.exit(-1);
}
//allow destination directory input
System.out.println("Enter destination directory:");
String to_dir=br.readLine();
//create file object to encapsulate the destination directory
File toDir=new File(to_dir);
if(!toDir.exists())
toDir.mkdir();
//allow the date modified input used for comparison
System.out.println("Enter the date modified(e.g. 2013-02-16):");
String modify_date=br.readLine();
//allow comparison value input
//0 means copy all files that their dates modified are equal to the input date
//1 means copy all files that their dates modified are less than the input date
//-1 means copy all files that their dates modified are greater than the input date
System.out.println("Enter comparison value (0, 1, or -1):");
int com=Integer.parseInt(br.readLine());
String[] files=fromDir.list();
System.out.println("Please wait...");
for(String s:files){
File myFile=new File(from_dir+"/"+s);
if(myFile.isFile()){
LocalDate localdate=LocalDate.parse(modify_date);
LocalDate modate=LocalDate.fromDateFields(new Date(myFile.lastModified()));
int x=localdate.compareTo(modate);
if(x==com){
System.out.println("Copying "+from_dir+"/"+s+" to "+to_dir);
copy(from_dir+"/"+s,to_dir+"/"+s);
}
}
}
System.out.println("Copy completed");
}catch(IOException ie){}
}
public static void copy(String srcfile, String descfile){
try{
//create stream reader
FileInputStream fis=new FileInputStream(srcfile);
//create stream writer
FileOutputStream fos=new FileOutputStream(descfile);
int data;
//start copying
while((data=fis.read())!=-1){
fos.write(data);
}
fos.flush();
fos.close();
fis.close();
}catch(IOException ie){}
}
public static void startProgram(){
int ch;
char con='y';
Scanner sc=new Scanner(System.in); //create scanner object to receive choice input
while(con=='y'){
showCopyOptions(); //show menu
System.out.println("Enter your choice:");
ch=sc.nextInt();
switch(ch){
case 1:copyFileByExt();break;
case 2:copyFileByModifyDate();break;
case 3:System.exit(0);break;
default:System.out.println("Invalid choice");
}
try{
//prompt for continuing the program
InputStreamReader isr=new InputStreamReader(System.in);
System.out.println("Press y to continue:");
con=(char)isr.read();
}catch(IOException ie){}
}
}
public static void showCopyOptions(){
System.out.println("1. Copy files by extension");
System.out.println("2. Copy files by date modified");
System.out.println("3. Exit program");
}
}
class ExtFilter implements FilenameFilter{
String ext="";
public ExtFilter(String ext){
this.ext="."+ext;
}
public boolean accept(File f, String name){
if(name.endsWith(ext)) return true;
else return false;
}
}
