Reference Calendar Bean : UseBean « JSP « Java Tutorial






Jsp code

<html>
<!--
 Licensed to the Apache Software Foundation (ASF) under one or more
  contributor license agreements.  See the NOTICE file distributed with
  this work for additional information regarding copyright ownership.
  The ASF licenses this file to You under the Apache License, Version 2.0
  (the "License"); you may not use this file except in compliance with
  the License.  You may obtain a copy of the License at

      http://www.apache.org/licenses/LICENSE-2.0

  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.
-->

<%@ page session="false"%>

<body bgcolor="white">
<jsp:useBean id='clock' scope='page' class='beans.MyBean' type="beans.MyBean" />

<font size=4>
<ul>
<li>  Day of month: is  <jsp:getProperty name="clock" property="dayOfMonth"/>
<li>  Year: is  <jsp:getProperty name="clock" property="year"/>
<li>  Month: is  <jsp:getProperty name="clock" property="month"/>
<li>  Time: is  <jsp:getProperty name="clock" property="time"/>
<li>  Date: is  <jsp:getProperty name="clock" property="date"/>
<li>  Day: is  <jsp:getProperty name="clock" property="day"/>
<li>  Day Of Year: is  <jsp:getProperty name="clock" property="dayOfYear"/>
<li>  Week Of Year: is  <jsp:getProperty name="clock" property="weekOfYear"/>
<li>  era: is  <jsp:getProperty name="clock" property="era"/>
<li>  DST Offset: is  <jsp:getProperty name="clock" property="DSTOffset"/>
<li>  Zone Offset: is  <jsp:getProperty name="clock" property="zoneOffset"/>
</ul>
</font>

</body>
</html>

MyBean.java

/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements.  See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License.  You may obtain a copy of the License at
*
*     http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package beans;

import java.beans.*;
import javax.servlet.http.*;
import javax.servlet.*;
import java.text.DateFormat;
import java.util.*;

public class MyBean {
Calendar  calendar = null;

    public MyBean() {
  calendar = Calendar.getInstance();
  Date trialTime = new Date();
  calendar.setTime(trialTime);
    }

    public int getYear() {
  return calendar.get(Calendar.YEAR);
    }
    
    public String getMonth() {
  int m = getMonthInt();
  String[] months = new String [] { "January", "February", "March",
          "April", "May", "June",
          "July", "August", "September",
          "October", "November", "December" };
  if (m > 12)
      return "Unknown to Man";
  
  return months[m - 1];

    }

    public String getDay() {
  int x = getDayOfWeek();
  String[] days = new String[] {"Sunday", "Monday", "Tuesday", "Wednesday", 
              "Thursday", "Friday", "Saturday"};

  if (x > 7)
      return "Unknown to Man";

  return days[x - 1];

    }
    
    public int getMonthInt() {
  return 1 + calendar.get(Calendar.MONTH);
    }

    public String getDate() {
  return getMonthInt() + "/" + getDayOfMonth() + "/" +  getYear();

    }

    public String getTime() {
  return getHour() + ":" + getMinute() + ":" + getSecond();
    }

    public int getDayOfMonth() {
  return calendar.get(Calendar.DAY_OF_MONTH);
    }

    public int getDayOfYear() {
  return calendar.get(Calendar.DAY_OF_YEAR);
    }

    public int getWeekOfYear() {
  return calendar.get(Calendar.WEEK_OF_YEAR);
    }

    public int getWeekOfMonth() {
  return calendar.get(Calendar.WEEK_OF_MONTH);
    }

    public int getDayOfWeek() {
  return calendar.get(Calendar.DAY_OF_WEEK);
    }
     
    public int getHour() {
  return calendar.get(Calendar.HOUR_OF_DAY);
    }
    
    public int getMinute() {
  return calendar.get(Calendar.MINUTE);
    }


    public int getSecond() {
  return calendar.get(Calendar.SECOND);
    }



    private static void p(String x) {
  System.out.println(x);
    }


    public int getEra() {
  return calendar.get(Calendar.ERA);
    }

    public String getUSTimeZone() {
  String[] zones = new String[] {"Hawaii", "Alaskan", "Pacific",
               "Mountain", "Central", "Eastern"};
  
  return zones[10 + getZoneOffset()];
    }

    public int getZoneOffset() {
  return calendar.get(Calendar.ZONE_OFFSET)/(60*60*1000);
    }


    public int getDSTOffset() {
  return calendar.get(Calendar.DST_OFFSET)/(60*60*1000);
    }

    
    public int getAMPM() {
  return calendar.get(Calendar.AM_PM);
    }
}
  Download:  JSPReferneceBeanCalendar.zip( 94 k)








23.43.UseBean
23.43.1.Import JavaBeans In JSP Page
23.43.2.Load JavaBeans In JSP Page
23.43.3.Using 'useBean' To Reference A Java Bean
23.43.4.Using initialized field in jsp page
23.43.5.Reference Package Name in JSP Page
23.43.6.Reference Calendar Bean
23.43.7.JSP Number Guess Bean
23.43.8.JSP Helper Bean HTMLFilter
23.43.9.Get/Set Value Using JSP Set Property
23.43.10.Call Setter In Java Bean To Change its Property Value
23.43.11.Call Bean Constructor To Pass In Message
23.43.12.Using the Date Class
23.43.13.Fields of the Calendar Class