CODEWITHSUNDEEP
javaxmlread-write
Goldengirl
Goldengirl

Reputation: 967

How to maintain the same format while reading and writing files in Java?

I am trying to read a xml file(in.arxml) and copy it into another xml file (out.arxml). When I just read the in.arxml file and display the contents in the workspace the spacing and the format is maintained and is exactly as it is in the file. However when I write this into the out.arxml file the entire ile is printed on a single line. Could somebody please tell me wht is it that I doing wrong? My code to read and write the file looks like this:

 BufferedWriter out;
 BufferedReader in;
 String x =null;
 int lineNumb=0;

 try {

            in = new BufferedReader (new FileReader("C:\\New_folder\\in.arxml"));
            out = new BufferedWriter(new FileWriter(""C:\\New_folder\\out.arxml"));
            while (in.readLine()!= null){

                x = in.readLine();
                java.lang.System.out.println(x);
                out.write(x);

                lineNumb++;
            }
            in.close();
       }catch (IOException e){
            java.lang.System.out.println("There was a problem" + e);
        }

The in.arxml file looks like :

  <?xml version="1.0" encoding="UTF-8"?>
  <xxx xmlns="http://xd3.h?.org" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation=""http://www.w3.org/2001/XMLSchema-instance">

And the out.arxml that is written looks like this 

  <?xml version="1.0" encoding="UTF-8"?> <xxx xmlns="http://xd3.h?.org" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation=""http://www.w3.org/2001/XMLSchema-instance">

Thank you for your help in advance.

Upvotes: 0

Views: 1457

Answers (3)

Andrey Tyukin
Andrey Tyukin

Reputation: 44957

The statement

x = in.readLine()

stores the content of a line in variable x. This string does not contain any line breaks. If you simply write the content of x into a file using

out.write(x)

you will of course lose all the line-breaks. Try to change it to 

out.write(x + "\n")

By the way: the condition in your while-loop should throw away every second line. Is this intended?

Why are you trying to work with XML files in a line-by-line manner? Using some XML framework would seem more appropriate.

Another remark: your current code looks like a strange re-implementation of "TEE". Are you sure that there is a good reason to re-implement it?

Upvotes: 1

Jean-Baptiste Yun&#232;s
Jean-Baptiste Yun&#232;s

Reputation: 36431

If you want to copy the content of a file then use Streams not Readers/Writers.

Streams operate at byte level and there is no interpretation while reading and writing bytes.

Readers/Writers operate at character level and some transformations may occur during reading/writing especially charset encoding and/or end-of-lines.

You also forget to output an end-of-line.

Upvotes: 1

Jeff Morin
Jeff Morin

Reputation: 1010

After out.write(x);, add the following line:

out.newLine();

This will add the missing carriage returns.

Upvotes: 2

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