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以前用php时写了一个简单的class，功能主要是解决，大量页面上需要显示下拉列表框选择年/月/日/周之类的。希望对大家学习php和java能有帮助。
php的实现如下：
getcurrentdate.class.php
<?php
/*
* 功能：生成下拉列表（年/月/日/周为当前值）
* 程序员：xiangli
* 日期：2003-01-19
*/
#—————————————————#
# 修改：2003-03-18 #
# 修改原因：添加了周的生成 #
#————————————————-#
class getcurrentdate{
var $years = 2002;
var $months = 12;
var $days = 31;
var $weeks = 52;
/*获得年的下拉列表*/
function getcurrentyear()
{
for ($i = date(y); $i >= $this->years; $i–)
{
echo "<option value=$i>{$i}年</option>\n";
}
}
/*获得月的下拉列表*/
function getcurrentmonth()
{
for ($i = 1; $i <= $this->months; $i++)
{
($i<10)?($m="0".$i):($m=$i);
if($i == date(m))
echo "<option value=$m selected>{$m}月</option>\n";
else
echo "<option value=$m>{$m}月</option>\n";
}
}
/*获得日的下拉列表*/
function getcurrentday()
{
for ($i = 1; $i <= $this->days; $i++){
if($i == date(d))
echo "<option value=$i selected>{$i}日</option>\n";
else
echo "<option value=$i>{$i}日</option>\n";
}
}
/*获得周的下拉列表*/
function getcurrentweek()
{
for ($i = 1; $i <= $this->weeks; $i++){
if($i == date(w))
echo "<option value=$i selected>{$i}周</option>\n";
else
echo "<option value=$i>{$i}周</option>\n";
}
}
}
?>
调用如下：
includ("../public/getcurrentdate.class.php");
$getcurrentdate = net getcurrentdate();
<select name ="xxxxx">
<?=$getcurrentdate->getcurrentyear()?>
</select>
//////////////////////////////////////////////////////////
java的实现方法：
getcurrentdate.java
/*
* 功能：生成下拉列表（年/月/日/周为当前值）
* 程序员：xiangli
* 日期：2003-01-19
*/
// #—————————————————#
// # 修改：2003-03-18 #
// # 修改原因：添加了周的生成 #
// #————————————————-#
import java.io.*;
import java.util.*;
import java.text.*;
public class getcurrentdate {
public int years = 2002;
public int months = 12;
public int days = 31;
public int weeks = 52;
date mydate = new date();
simpledateformat formatter = new simpledateformat("yyyy-mm-dd w");
/*获得年的下拉列表*/
public string getcurrentyear()
{
string content = "";
for (int i = integer.parseint(formatter.format(mydate).tostring().substring(0, 4)); i >= years; i–)
{
content += "<option value=" + i + ">" + i + "年</option>\n";
}
return content;
}
/*获得月的下拉列表*/
public string getcurrentmonth()
{
string m;
string content = "";
for (int i = 1; i <= months; i++)
{
m=i<10?("0" + i):integer.tostring(i);
if(i == integer.parseint(formatter.format(mydate).tostring().substring(5, 7)))
content += "<option value=" + m + " selected>" + m + "月</option>\n";
else
content += "<option value=" + m + ">" + m + "月</option>\n";
}
return content;
}
/*获得日的下拉列表*/
public string getcurrentday()
{
string content = "";
string m;
for (int i = 1; i <= days; i++){
m=i<10?("0" + i):integer.tostring(i);
if(i == integer.parseint(formatter.format(mydate).tostring().substring(8, 10)))
content += "<option value=" + m + " selected>" + m + "日</option>\n";
else
content += "<option value=" + m + ">" + m + "日</option>\n";
}
return content;
}
/*获得周的下拉列表*/
public string getcurrentweek()
{
string content = "";
string m;
for (int i = 1; i <= weeks; i++){
m=i<10?("0" + i):integer.tostring(i);
if(i == integer.parseint(formatter.format(mydate).tostring().substring(11)))
content += "<option value=" + m + " selected>" + m + "周</option>\n";
else
content += "<option value=" + m + ">" + m + "周</option>\n";
}
return content;
}
}
调用方法：
<jsp:usebean id="getcurrentdate" scope="session" class="getcurrentdate" />
<select name="years">
<%=getcurrentdate.getcurrentyear()%>
</select>
<select name="months">
<%=getcurrentdate.getcurrentmonth()%>
</select>
<select name="days">
<%=getcurrentdate.getcurrentday()%>
</select>
<select name="weeks">
<%=getcurrentdate.getcurrentweek()%>
</select>
