I want to read particular string from a text file and store them in Excel sheets

Question

My Text file Contains line like this

FLTR TID: 0000003756 RPC ID: 0000108159 USER: Remedy Application Service

FLTR TID: 0000003756 RPC ID: 0

Answer 1

First off, I am not an expert and have never tried this myself nor can I at the moment. From looking at your code I can spot a few design flaws that might be the reason for your problem.

You only ever declare one row:

static HSSFRow row= sheet.createRow((short)1);

This means that in your store method, the same row's cells will be written again and again. What you are missing is the logic to create a new row if a unique name is encountered. For this task, may I suggest using a Set preferably one operating on hashes for the benefit of low lookup time, and storing all unique names in there? That way you can use a simply contains query.

Furthermore, your countvariable is off and starts counting at 2, not at one. Initialise it to 0 or increment it after its use.

Some pseudocode:

private HashSet names = new HashSet<>();
// More fields here.

// Now start in your if clause:
if(str.contains("FLTR" && !names.contains(str.substring(48))
{
    store(user, count);
    count++;
    names.add(str.substring(48));
}

// More of your code.

private static void store(String user, int count)
{
    // Create new row
    HSSFRow row = sheet.createRow((short)rowCount);
    rowCount++;


    row.createCell((short) 0).setCellValue(count);
    row.createCell((short) 1).setCellValue(user);
}