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From "Sebb (JIRA)" <j...@apache.org>
Subject [jira] Commented: (IO-199) Replace strings in file
Date Mon, 16 Mar 2009 12:18:50 GMT

    [ https://issues.apache.org/jira/browse/IO-199?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12682297#action_12682297
] 

Sebb commented on IO-199:
-------------------------

Replacement of strings is not possible without creating a copy of the input file, either on
disk or in memory.

If the replacement string is no longer that the original, it might be possible to use read-write
mode, but in general that won't work.

> Replace strings in file
> -----------------------
>
>                 Key: IO-199
>                 URL: https://issues.apache.org/jira/browse/IO-199
>             Project: Commons IO
>          Issue Type: New Feature
>          Components: Utilities
>            Reporter: Alexander Stroell
>            Priority: Minor
>
> A method, that can replace strings (keys) in a file would be very useful. 
> For example if you have a file with the following text:
> {noformat}
> The packet must arrive between @dateFrom and @dateTo. 
> {noformat}
> You can now replace the "keys" with a value of your choice..
> Perhaps something like this:
> {code}	
> public static void replaceStrings(File inputFile, File outputFile, List<KeyValuePair<String,
String>> replacements) throws IOException{
> 		BufferedReader in = new BufferedReader(new FileReader(inputFile));
> 		BufferedWriter out = new BufferedWriter(new FileWriter(outputFile));
> 		
> 		String line;
> 		
> 		while ((line = in.readLine()) != null) {
> 			for(KeyValuePair<String, String> kvp : replacements){
> 				line = line.replace(kvp.getKey(), kvp.getValue());
> 			}
> 			out.write(line);
> 			out.newLine();
> 		}
> 		out.flush();
> 		out.close();
> 		in.close();
> 	}
> {code}
> I think it should also be possible, to replace the strings in the inputfile so you don't
have to create a new file (outputfile)
> Regards Alex

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