How to replace strings with ant

If you have a file where some strings have to be automatically replaced during the deployment, you can use the filterset ant command like in the example:

<target name="replaceString" description="Replace host name and port String">
        <copy todir="tmp/myTemporaryDirectory">
            <filterset>
              <filter token="REMOTE_HOST_NAME" value="${remote.host.name}"/>
              <filter token="REMOTE_HOST_PORT" value="${remote.host.port}" />
            </filterset>
            <fileset dir="./directoryContainingFileWithStringsToBeReplaced">
                <include name="myHost.jsp" />
                <include name="backupHost.jsp" />
            </fileset>
        </copy>       
    </target>

In your files myHost.jsp and backupHost.jsp there will be the following String:
@REMOTE_HOST_NAME@ and @REMOTE_HOST_PORT@
for any occurence of them, something like:

./directoryContainingFileWithStringsToBeReplaced/file.jsp:

String urlString = "http://@REMOTE_HOST_NAME@:@REMOTE_HOST_PORT@/jsp/file.jsp?";

Do not forget to use the directory tmp/myTemporaryDirectory, where your replacement have been executed!!