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Thread: read csv file in java

  1. #1
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    Default read csv file in java

    Hi,

    How to read upto NA(Not Applicable) and Zero values in diffrent columns from csv file using string tokenizer in java program.

    Here Columns are dynamically populated.Please repaly this QUERY asap.

    File contains like this....


    Agerange name salaray range
    0_10 KRISHNA 0_1000
    10_20 KISHORE 1000_10000
    30_NA BOOK 10000_NA
    NA_NA PAPER NA
    NA_NA PEN NA_NA
    Last edited by kishore1981; November 5th, 2012 at 06:54 AM. Reason: given some example file


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: read csv file in java

    Can you post the code you are working on?

    BTW This thread moved here from Member Introductions section.
    If you don't understand my answer, don't ignore it, ask a question.

  3. #3
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    Default Re: read csv file in java

    Hi ,

    This my business method code...


    private void readFromVarRange(InputStream is) throws IOException{


    InputStreamReader isr = new InputStreamReader(is);
    BufferedReader br = new BufferedReader(isr);


    System.out.println("============================== ====-------------"+br);



    try
    {


    String strLine = "";
    StringTokenizer st = null;
    int lineNumber = 0, tokenNumber = 0;

    //read comma separated file line by line
    while( (strLine = br.readLine()) != null)
    {
    lineNumber++;

    //break comma separated line using ","
    st = new StringTokenizer(strLine, ",");



    while(st.hasMoreTokens())
    {
    //display csv values


    tokenNumber++;



    System.out.println("Line # " + lineNumber + ", Token # " + tokenNumber + ", Token : "+ st.nextToken());



    }

    //reset token number
    tokenNumber = 0;

    }


    }
    catch(Exception e)
    {
    System.out.println("Exception while reading csv file: " + e);
    }

    From this code I am trying to get the columns data upto NA(Not Applicable) and Zero in different columns in csv file using String tokenizer in java

    Please give me answer ASAP.

  4. #4
    Super Moderator Norm's Avatar
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    Default Re: read csv file in java

    Please Edit your post and wrap your code with
    [code=java]
    <YOUR CODE HERE>
    [/code]
    to get highlighting and preserve formatting.

    For testing you need to provide a small, complete program that compiles and executes.

    Can you explain what the current problems are with the code? Post the program's output, explain what is wrong with it and show what you want it to be.
    If you don't understand my answer, don't ignore it, ask a question.

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