dateselectortag.java

ejb克斯人随风俗

/* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
 
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 $Id: DateSelectorTag.java,v 1.1 2004/04/15 03:43:53 yutayoshida Exp $ */

package com.sun.j2ee.blueprints.waf.view.taglibs.smart;

import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;

import java.io.*;
import java.util.*;

/**
 * HTML 'input' tag. Use with NameTag and ValueTag.
 */
public class DateSelectorTag extends SimpleTagSupport {

    private String locale = "en_US";
    private String prefix = "date";
    private Calendar calendar;
    
    public void setLocale(String locale) {this.locale=locale;}
    public void setPrefix(String prefix) {this.prefix=prefix;} 
    
    public void setDate(Date d) {
        if (locale == null){
            calendar = Calendar.getInstance();
        } else {
            calendar = Calendar.getInstance(new Locale(locale));
        }
    }
    
    public void setCalendar(Calendar calendar) {
        this.calendar = calendar;
    }
    
    public void doTag() throws JspTagException, IOException { 
        JspWriter out = getJspContext().getOut();
        // default to current date if not specified
        if (calendar == null) {
            Date date = new Date();
            setDate(date);
        }
        int day = calendar.get(Calendar.DAY_OF_MONTH) ;
        int month = calendar.get(Calendar.MONTH) + 1;
        int year = calendar.get(Calendar.YEAR) ;
        // create the select tags
        if ((locale != null) && locale.toLowerCase().equals("en_us") ||
            locale.toLowerCase().equals("en-us")) {
            out.print("<label for=\"month_id\">Month:</label>");
            createSelect(prefix + "_month", 1 , 12 , month, "month_id", out);
            out.print("<label for=\"day_id\">Day:</label>");
            createSelect(prefix + "_day", 1, 31, day, "day_id", out);
            out.print("<label for=\"year_id\">Year:</label>");
            createSelect(prefix + "_year", year, year + 4, year, "year_id", out);
        } else if ((locale != null) && locale.toLowerCase().equals("ja_jp") ||
            locale.toLowerCase().equals("ja-jp")) {
            out.print("<label for=\"year_id\">\u5e74:</label>");
            createSelect(prefix + "_year", 2003, 4, year, "year_id", out);
            out.print("<label for=\"month_id\">\u6708:</label>");
            createSelect(prefix + "_month", 1, 12 , month, "month_id", out);
            out.print("<label for=\"day_id\">\u65e5:</label>");
            createSelect(prefix + "_day", 1, 31, day, "day_id", out);
        }
        reset();
    }
    
    private void createSelect(String name,
                                                      int start,
                                                      int count,
                                                      int selectedIndex,
                                                      String id,
                                                     JspWriter out) throws IOException {
        out.write("<select name=\"" + name + "\" id=\"" + id + "\">");
        for (int loop=start; loop < count +1; loop++) {
            if (loop == selectedIndex) {
                out.write("<option selected>" + loop + "</option>");
            } else {
                out.write("<option>" + loop + "</option>");
            }
        }
        out.write("</select>");
    }
    
    private void reset() {
        locale = "en_US";
        prefix = "date";
        calendar = null;
    }
}