Java 更改Tomcat 7应用程序上的时区-Openshift

我在openshift（免费版）上部署了一个web应用程序，一直在努力修复时区，但运气不佳。我的时区是“亚洲/科伦坡”。我该怎么做

我的应用程序托管在ApacheTomcat7服务器上

   // gives me current date from server time zone
   java.util.Date date = new Date();

   // However for now I manage to fix the issue with below code
   // without having to change it from server side.
   public static Date getNormalizedDate() {

     Calendar today = Calendar.getInstance(TimeZone.getTimeZone("Asia/Colombo"));
     Calendar cal = Calendar.getInstance();

     cal.set(Calendar.DATE, today.get(Calendar.DATE));
     cal.set(Calendar.MONTH, today.get(Calendar.MONTH));
     cal.set(Calendar.MONTH, today.get(Calendar.MONTH));
     cal.set(Calendar.HOUR_OF_DAY, today.get(Calendar.HOUR_OF_DAY));
     cal.set(Calendar.MINUTE, today.get(Calendar.MINUTE));
     cal.set(Calendar.SECOND, today.get(Calendar.SECOND));

     return (cal.getTime());
  }

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显示时区错误的代码问题到底是什么？你得到了什么结果？你期望什么？