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File Splitter

Discussion in 'Java' started by sallu, Jan 18, 2005.

  1. sallu

    sallu New Member

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    Here is a file splitter made in java . try it with files. Don't try it with directory. It will not respond in the way u want.
    Splitter class
    Code:
    import java.io.*;
    
    class Splitter
    {
    	public static void main(String[] args) throws IOException
    	{
    		takeInput(args);
    	}
    
    	static void takeInput(String[] args) throws IOException
    	{
    		String str;
    		String assembledFileName;
    		int splitLength;
    
    		BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
    
    		try
    		{
    			if(args.length==0)
    			{
    				System.out.println("Enter the filename:");
    				str=br.readLine();
    				System.out.println("Enter the name of the file after assembling(without extension):");
    				assembledFileName=br.readLine();
    				System.out.println("Enter the split size:");
    				splitLength=Integer.parseInt(br.readLine());
    
    
    				SplitFiles ob1=new SplitFiles(str,splitLength);
    
    				SplitListOnly ob2=new SplitListOnly(str,assembledFileName);
    				ob2.batchFileMaker();
    			}
    			else if(args.length>1)
    			{
    				System.out.println("Invalid arguments.");
    				System.exit(1);
    			}
    		}
    		catch(NumberFormatException e)
    		{
    			System.out.println("Problem in number format...");
    			e.printStackTrace();
    		}
    	}
    }
    
    SplitListOnly class
    Code:
    import java.io.*;
    import java.util.*;
    
    class SplitListOnly
    {
    	File f1;
    	File f2;
    	String[] s;
    	String str;
    	String assembledFileName;
    	SplitListOnly(String fileName,String assembledFileName) throws IOException
    	{
    		try
    		{
    			f1=new File(fileName);
    			f2=new File(f1.getParent());
    			this.assembledFileName=assembledFileName;
    			FilenameFilter only=new OnlyExt("spt",f1.getName());
    
    			s=f2.list(only);
    		}
    		catch(Exception e)
    		{
    			System.out.println("Exception occurred in SplitListOnly(String fileName,String assembledFileName) constructor.");
    			e.printStackTrace();
    		}
    	}
    
    	void batchFileMaker()
    	{
    		try
    		{
    			FileWriter fw=new FileWriter(f2.getPath()+"\\"+"Assemble.bat");
    			fw.write("@echo off\n");
    			fw.write("copy /B ");
    			for(int i=0;i<s.length;i++)
    			{
    				str=new String(f1.getPath()+"."+(i+1)+".spt");
    				fw.write(str);
    				if((i+1)<s.length)
    					fw.write("+");
    
    			}
    			str=(f1.getName()).substring((f1.getName()).indexOf(".")+1,(f1.getName()).length());
    			fw.write(" "+f2.getPath()+"\\"+assembledFileName+"."+str);
    			fw.write("\necho The files have been assembelled successfully..........");
    			fw.write("\npause");
    			fw.close();
    		}
    		catch(Exception e)
    		{
    			System.out.println("Exception occurred in void batchFileMaker() method.");
    			e.printStackTrace();
    		}
    	}
    }
    
    SplitFiles class to split the files
    Code:
    import java.io.*;
    
    
    class SplitFiles
    {
    	FileInputStream fin;
    	FileOutputStream fout;
    	int len;
    	int splitlen;
    	String str;
    
    	SplitFiles(String fileName,int splitlength)
    	{
    		try
    		{
    			fin=new FileInputStream(fileName);
    			str=fileName;
    			len=0;
    			splitlen=splitlength;
    			Split();
    
    		}
    		catch(FileNotFoundException e)
    		{
    			System.out.println("File not found.");
    		}
    		catch(IOException e)
    		{
    			System.out.println("IOException generated");
    		}
    	}
    	void Split()
    	{
    
    		try
    		{
    			int i=0;
    			FileInputStream fin=new FileInputStream(str);
    			int c=fin.read();
    			while(c!=-1)
    			{
    				FileOutputStream fw=new FileOutputStream(str+"."+(i+1)+".spt");
    				while(c!=-1 && len<splitlen)
    				{
    					fw.write(c);
    					c=fin.read();
    					len++;
    				}
    				len=0;
    				fw.close();
    				i++;
    			}
    
    		}
    		catch(Exception e)
    		{
    			System.out.println("gg");
    			e.printStackTrace();
    		}
    	}
    
    }
    OnlyExt filters the file from folders and other objects like Shortcuts / links / Special folders.
    Code:
    import java.io.*;
    
    public class OnlyExt implements FilenameFilter
    {
    	String ext,fileName;
    
    	OnlyExt(String ext,String fileName)
    	{
    		try
    		{
    			this.ext="."+ext;
    			this.fileName=fileName;
    		}
    		catch(Exception e)
    		{
    			System.out.println("Exception occurred in OnlyExt(String ext,String fileName) +construcctor.");
    		}
    	}
    	public boolean accept(File dir,String name)
    	{
    		return name.endsWith(ext) && name.startsWith(fileName);
    
    	}
    
    }
    
    Included in the attachment the class files as well.
     

    Attached Files:

  2. shabbir

    shabbir Administrator Staff Member

    Joined:
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    You have posted the thread in queries and expert comment section. I have moved it to the Codes and project section.

    Also nice work.
     
  3. coderzone

    coderzone Super Moderator

    Joined:
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    Hey I searched on net using the keywords related to File splitter program and the results were all utilities and other stuff to split the file and finally when I searched here found this. It really helped but I always had the feeling Google is the best way to find the things but today I have proved my opinon wrong
     

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