[SOLVED] Text Parser

[karthik7974]

Hi
I am having the following code:

Code:

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.DataInputStream;
import java.io.FileInputStream;
import java.io.FileWriter;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;

public class ReadLogFile {

	/**
	 * @param args
	 */
	public ReadLogFile(){
		
	}
	private List readFile (String inputFile,String content){
		List logs = new ArrayList();
		try {
			FileInputStream fis=new FileInputStream(inputFile);
			DataInputStream dis=new DataInputStream(fis);
			BufferedReader br=new BufferedReader(new InputStreamReader(dis));
			String strLine;
			while ((strLine = br.readLine()) != null) {
				System.out.println("Line:|" +strLine);
				int index;
				index = strLine.indexOf(content);
				System.out.println("Index:|" +index);
				if (index != -1){
					System.out.println("log with search string:|" +strLine+"|");
					logs.add(strLine);
				}else 
					System.out.println("line does not have serach string");
			}
			
		}catch (Exception e){
			System.out.println("Exception while reading file:|" +e.getMessage());
		}
		return logs;
	}
	
	private void writeFile(List logs,String outputFile){
		try {
			BufferedWriter bw = new BufferedWriter(new FileWriter(outputFile,true));			
			System.out.println("Inside write file method,list size:|" +logs.size());
			for(int i=0;i<logs.size();i++){
				System.out.println("Inside for loop:|" );
				bw.write((String)logs.get(i));
				bw.newLine();
				System.out.println("file has been written successfully:|" +logs.get(i) );
			}
			bw.close();
		}catch(Exception e){
			System.out.println("Exception when writing the file:|" +e.getMessage());
		}
		
	}
	
	
	public static void main(String args[]) throws Exception{
		// TODO Auto-generated method stub		
		String inputFile = null;
		String searchString = null;
		String outputFile = null;
		System.out.print("Enter Input File: ");
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		inputFile = br.readLine();		
		System.out.print("Enter Search String: ");
		BufferedReader br1 = new BufferedReader(new InputStreamReader(System.in));
		searchString = br1.readLine();		
		System.out.print("Enter Output File: ");
		BufferedReader br2 = new BufferedReader(new InputStreamReader(System.in));
		outputFile = br2.readLine();		
		ReadLogFile logfile = new ReadLogFile();
		List log = new ArrayList();
		log = logfile.readFile(inputFile,searchString);
		System.out.println("Reading log file completed:|");
		logfile.writeFile(log,outputFile);
	}
}

I need to search a string and write to new file

The string here is date 10-10-2008

Input file
Date Time Server IP Desc
---------------------------------------------------------------
10-10-2008 10:10 Server 1 xx.xx.xx.xx File Server
11-10-2008 20:10 Server 2 xx.xx.xx.xx File Server Linux
12-10-2008 22:10 Server 3 xx.xx.xx.xx File Server Win
13-10-2008 23:10 Server 4 xx.xx.xx.xx File Server aaa

OutPut File
10-10-2008 10:10 Server 1 xx.xx.xx.xx File Server

The current code will write the whole line into a new file when i give a date.
I need more than 2,3 dates to be searched and lines written to new file.

I dont know how to edit

Please help

Thanks in advance.

[Eranga]

Loop the same process, after processing th first date.

[karthik7974]

can u give me more details in code

[Eranga]

Can you find the code, where user informations gets in to the application. Look at the main method. Did you find it?

[karthik7974]

My request is to

give input 2 or three strings to search at a time

Enter Input File: InputFile.txt
Enter Search String:10-10-2008,server2,192.168.1.1
Enter Output File : OutFile.txt

I dont know how to statisfy the conditions more than one in the search string

[Eranga]

Ah, you want to do that. Ok, how did you done for one search string?

[karthik7974]

I did not write this code. I am beginner to java.
I downloaded it from web.

Basically i am an unix guy.

trying to help my client for checking daily report of server status.

Eranga, can u help me.

Thanks.

[Eranga]

Ok, but it's better to explore something on it. Actually I have to work a lot to fill your requirement. Simply I can do this for you. Change the main method as follows.

Code:

	public static void main(String args[]) throws Exception{
		// TODO Auto-generated method stub		
		String inputFile = null;
		String searchString = null;
		String outputFile = null;
                do {
                    System.out.print("Enter Input File: ");
                    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
                    inputFile = br.readLine();		

                    System.out.print("Enter Search String: ");
                    BufferedReader br1 = new BufferedReader(new InputStreamReader(System.in));
                    searchString = br1.readLine();		
                    
                    System.out.print("Enter Output File: ");
                    BufferedReader br2 = new BufferedReader(new InputStreamReader(System.in));
                    outputFile = br2.readLine();		
                    ReadLogFile logfile = new ReadLogFile();
                    List log = new ArrayList();
                    log = logfile.readFile(inputFile,searchString);
                    
                    System.out.println("Reading log file completed:|");
                    logfile.writeFile(log,outputFile);
                }while(true);
	}

[Eranga]

Here what you want, do it with busy works. Test and let me know.

Code:

	public static void main(String args[]) throws Exception{
		// TODO Auto-generated method stub		
		String inputFile = null;
		String searchString = null;
		String outputFile = null;

                    System.out.print("Enter Input File: ");
                    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
                    inputFile = br.readLine();		

                    System.out.print("Enter Search String: ");
                    BufferedReader br1 = new BufferedReader(new InputStreamReader(System.in));
                    searchString = br1.readLine();		
                    
                    System.out.print("Enter Output File: ");
                    BufferedReader br2 = new BufferedReader(new InputStreamReader(System.in));
                    outputFile = br2.readLine();
                    
                    ReadLogFile logfile = new ReadLogFile();
                    
                    String[] nn = searchString.split(",");
                    for(int i = 0; i < nn.length; i++){
                                         List log = new ArrayList();    
                        log = logfile.readFile(inputFile,nn[i]);    
                        logfile.writeFile(log,outputFile);                    
                    }
                    System.out.println("Reading log file completed:|");
	}

[karthik7974]

Hi Eranga,

I could`n get output wat i really needed.
I have already escalated to Application Support.
Anyway thanks for your cooperation.

Please sign my guestbook in www(dot)karthik(dot)sg
thanks

.

[Eranga]

Quote:

Originally Posted by karthik7974

I could`n get output wat i really needed.

What you mean here, as far as I get you the last post mine contain the correct code. Isn't?

[DonCash]

You need something like this:

Code:

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileInputStream;
import java.io.FileWriter;
import java.io.InputStreamReader;
import java.io.Writer;

public class StringFind {
	
	public static String path;
	public static String FindMe;
	public String strLine;
	
	public void openFile(){

		String newLine = System.getProperty("line.separator");
		
		try {
			Writer output = new BufferedWriter(new FileWriter("output.txt"));
			
			FileInputStream in = new FileInputStream(path);
			BufferedReader br = new BufferedReader(new InputStreamReader(in));
		
		while ((strLine = br.readLine()) != null){
			
			if (strLine.contains(FindMe))	{
				output.write(strLine);
				output.write(newLine);
			}

			}
				output.close();
				System.out.println("Completed. Output file generated.");
				
		}catch(Exception e)	{
			System.out.println("OUCH! I fell over.");
			System.exit(0);
		}
	}

	public static void main(String[] args) {
		
		StringFind sf = new StringFind();

		if (args.length < 2){
			System.out.println("ERROR! No parameters sent");
			System.exit(0);
		}
		
                        //path = "myFile.txt";
		//FindMe = "10-10-2008";

		path = args[0];
		FindMe = args[1];
		
		sf.openFile();
				
	}
}

This code takes 2 parameters. The first is the file path eg: myfile.txt and the second is the string you are looking for.

As it reads the file it will write all the lines that match FindMe to the output.txt file.

[Eranga]

Quote:

Originally Posted by DonCash

This code takes 2 parameters. The first is the file path eg: myfile.txt and the second is the string you are looking for.

As it reads the file it will write all the lines that match FindMe to the output.txt file.

Yep . But I don't know he can manage this code!

[DonCash]

We will see!! We can help with any problems he is having with it.. I am coding something similar myself right now.

[Eranga]

Ok we will see pal

By the way did you try my second answer on the post number 9. For me it's working fine. Their I can give multiple search strings for the file searching.

[DonCash]

No, I couldn't actually get it to work.

I guess its because it contains 2 classes and you only posted the main one?

What is the content of the ReadLogFile class?

I think this would of been quite confusing to fix for someone who doesn't know Java.

[karthik7974]

Hi Don,

Thanks for your help,
I tried your code too. Initially got an error. u did not declare deleteMe.
I declared and it was compiled with no errors.

But can see only empty output.txt

i received OUCH! I Fell Over.

I think my request in this forum is not clear, maybe.
I will clear it now.

The code i posted is working fine. but works for one string at a time.

But my request is to send the line to output file only if the below condition is true

Enter Log File : Input.txt
Enter String : 10/10/2008,server1,xxx.xxx.xxx.xxx
Enter Output File : Output.txt

only if 10/10/2008,server1,xxx.xxx.xxx.xxx (ip address) these 3 strings are in a line then that line has to be send to output.

but all your replies satisfies either one of the 3 string in a line was sent to output file

I want an output file in which all the 3 strings are in the same line.

Can you help.

Hi Eranga,
I am not familiar with java basics, but a little knowledge with scripting.
I own a forum too www(dot)karthik(dot)sg/MyForum/

but not enough time to develop my programming skills
R U OK to teach me online.

I am ready to help your forum with any pace, like answering unix+java related questions and even something else.

Hi Webmaster,
Please edit any words exceed your terms & conditions. Sorry if so. I really mean to express my good will to all.
Thanks to all.

[DonCash]

Hey,

Sorry about that. I edited the code after I posted it and forgot to change deleteMe to FindMe. I have updated it again now so it should work fine.