JSF Read Text File

Question

I've been googling all over the place for information on how to display content from a .txt file onto a web page using JSF with no success.

From what I think/guess, the basic jsf form would be something like

<h:outputText value="#{beanName.printTextFileMethod}"/>

or something.

Help on how to set up bean appreciated. I tried playing with InputStream/BufferedStream, having a lot of problem just trying to get rid of the red lines in codes. Also I'm absolutely horrid at defining relative path. And absolute path doesn't seem to work with inputstream?

Thank you for your time.

You have a Java problem, not from JSF. Check [Best way to read a text file](http://stackoverflow.com/q/4716503/1065197) to solve your riddles about working with text files. — Luiggi Mendoza, Dec 15 '12 at 17:10

Mohammod Hossain · Answer 1 · 2012-12-15T10:59:33.717

0

    public class TextFileBean{   
        String completeMessage = null;
         public TextFileBean(){
          try{
           //read data from the text file
           java.io.BufferedReader in=
              new java.io.BufferedReader(
                new java.io.InputStreamReader(
                  TextFileBean.this.getClass().
                   getResourceAsStream("txtFile.txt"
               )));
 System.out.println("in :" +in);
           readData(in);
           in.close();
           } catch (java.io.IOException IOex) {
             System.out.println("IO Error :" +IOex);
           }
         }    

        private void readData(BufferedReader br) {
        // dosomethig
        String line = null;     
        StringBuffer appendMessage = null;
        try {
            appendMessage = new StringBuffer(16384);
            while ((line = br.readLine()) != null) {
                appendMessage.append(line);
                appendMessage.append('\n');
            }
            if (appendMessage != null) {
                completeMessage = appendMessage.toString();
            }
        } catch (Exception e) {
        }

    }

    public String printTextFileMethod()
    {

        System.out.println("completeMessage:: "+ completeMessage);         
            return completeMessage;
     }

  }

edited Dec 15 '12 at 10:59

answered Dec 15 '12 at 08:56

Mohammod Hossain

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Thank you for your fast reply. I finally see a clean code on my page without any red lines. I'm assuming with your code, you call it by – user1892752 Dec 15 '12 at 09:31
Not yet, sorry. Still a blank page on my end. – user1892752 Dec 15 '12 at 09:38
if file path found then it will eneter readData method block,otherwise it will throws FileNotFoundException. are u getting any exception? – Mohammod Hossain Dec 15 '12 at 09:48
No exceptions, everything seems to run fine. I placed another outputText with the value of "Whee" and it prints that, just no data from text file. – user1892752 Dec 15 '12 at 09:52
try to print log info into while block – Mohammod Hossain Dec 15 '12 at 09:54
I'm not sure what you mean by print log info :( – user1892752 Dec 15 '12 at 10:05
Oh yes, I put a System.out.print(line) in while loop, nothing from text file shows up also. Also a System.out.print("asdhfkjahfd"), which also didn't print. – user1892752 Dec 15 '12 at 10:10
before calling readData() check BufferedReader in is null or not – Mohammod Hossain Dec 15 '12 at 10:22
I placed a if statement which check if BuffedReader in is null or not before calling readData, but the System.out.print(), isn't printing anything too. – user1892752 Dec 15 '12 at 10:55
which bean method are u calling? call printTextFileMethod() method – Mohammod Hossain Dec 15 '12 at 10:58
for checking if method is calling ,print any text into readData method. It is private method. – Mohammod Hossain Dec 15 '12 at 11:02
Yahh, I tried to print anything on it. Also tried changing it to public. nothing prints – user1892752 Dec 15 '12 at 11:05
call printTextFileMethod method with print something.check your faces-config file managed bean scope is set session or application – Mohammod Hossain Dec 15 '12 at 11:07
Hm, first thing I did was set the scope to session. I use netbeans, so faces-config doesn't appear to be created with creation of new projects. And calling printTextFileMethod, with string "Print something" also no work – user1892752 Dec 15 '12 at 11:13
is printTextFileMethod method called from bean? – Mohammod Hossain Dec 15 '12 at 11:15
check constructor calling and readData method , flow step by step where it is calling or not. – Mohammod Hossain Dec 15 '12 at 11:16
Hmm, I just realized, it probably wasn't called... Cause when you try to call the bean from jsf, the option to select the given methods from textFileBean isn't showing up. – user1892752 Dec 15 '12 at 12:58
I tried various things, it says I'm unable to instantiate TextFileBean, so I removed the catchIO instructor from the constructor catch block. And now it says, unable to find method readData – user1892752 Dec 15 '12 at 13:11

JSF Read Text File

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