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