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POSending Dates over RMI between machines in different regions
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copied!<p>I'm having a problem sending java.util.Date objects over RMI, to and from machines in different timezones. </p> <p>For example, a client in Germany will send a date object to a server in the UK.</p> <ol> <li>User enters a date string e.g. 20090220.</li> <li>Client app in Germany converts it to date using SimpleDateFormat("yyyyMMdd") to give: Fri Feb 20 00:00:00 CET 2009</li> <li>Server in UK receives Date over RMI as: Thu Feb 19 23:00:00 GMT 2009</li> <li>Server stores Date into a UK Oracle Database DATE column</li> </ol> <p>What is the best way to get around this issue of incorrect dates? I could send the date string across and have the Server convert it to a Date, but I want to reduce the amount of work that the Server has to do.</p> <p>Here is a stand-alone test program showing date serialisation:</p> <pre><code>import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.ObjectInputStream; import java.io.ObjectOutputStream; import java.text.SimpleDateFormat; import java.util.Date; import java.util.Locale; public class SerializationTest { public static void main(String[] args) throws Exception { final String yyyyMMdd = "20090220"; final Date date = new SimpleDateFormat("yyyyMMdd").parse(yyyyMMdd); if (args.length != 1) { System.out.println("Usage SerializationTest S|D"); } boolean serialise = false; if (args[0].equals("S")) { serialise = true; } else if (args[0].equals("D")) { serialise = false; } String filename = "date.ser"; if (serialise) { // write the object to file FileOutputStream fos = new FileOutputStream(filename); BufferedOutputStream bos = new BufferedOutputStream(fos); ObjectOutputStream outputStream = new ObjectOutputStream(bos); outputStream.writeObject(date); outputStream.flush(); outputStream.close(); System.out.println("Serialised: " + date); } else { FileInputStream fis = new FileInputStream(filename); BufferedInputStream bis = new BufferedInputStream(fis); ObjectInputStream inputStream = new ObjectInputStream(bis); Date outDate = (Date) inputStream.readObject(); inputStream.close(); // print the object System.out.println(outDate); } } } </code></pre>

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