read and replace text in file

[sreeni san]

HI
I have a xml file shown below
<?xml version="1.0" standalone="no"?>
<destination>
<file name="check.xml">
<tag type="line">data to be replaced as line1</tag>
<junk_tag>xyz</junk_tag>
<tag type="line">data to be replaced as line1</tag>
<tag type="line">data to be replaced as line3</tag>
<tag type="img>c:\....</tag>

</file>
</destination>

I need to read the file and check for <tag type="line"> and replace the value between
<tag type="line"> </tag> in the file.
Also I need to store the value of the tag in a hash table with key value pair as for example
[line1(key), data to be replaced as line1(value)]
How do I do it?
Thanks
sreeni

[Michael Yuan]

Well, I do not think you need to parse the XML file at all. You can use regular expressions. J2SE 1.4 now has a regexp package that can handle regular expressions very well. Check it out!

[Adrian Burke]

Right now, I am defining my String values within my class. I am not catering for multiple Strings to be replaced.

Here is where I'm at:

import java.io.*;

public class Replace {
	public static void main(String args[]) throws Exception {

		String str;
		String srcFile = args[0];
		String resultFile = args[1];		
		String s1 = "HOSTNAME";
		String s2 = "myDevelopmentServer";

		try {
			FileInputStream fis = new FileInputStream(srcFile);
			DataInputStream input = new DataInputStream(fis);
			FileOutputStream fos = new FileOutputStream(resultFile);
			DataOutputStream output = new DataOutputStream(fos);

			while (null != ((str = input.readLine()))) {

				int x = 0;
				int y = 0;
				String result = "";
				while ((x = str.indexOf(s1, y)) > -1) {
					result += str.substring(y, x);
					result += s2;
					y = x + s1.length();
				}
				result += str.substring(y);
				str = result;

				if (str.indexOf("'',") != -1) {
					continue;
				} else {
					str = str + "\n";

					output.writeBytes(str);
				}
			}
		} catch (IOException e) {
			System.err.println("Problem..." + e);
		}
	}
}

[Campbell Ritchie]

Why are you using Streams rather than Readers if you are dealing with text?