设计一个 oa 当中的日历显示跳转上月下月

主要就是利用 java的Calendar 类

传入一个参数如yyyyMMdd 20101201 这样的参数

然后找到月的第一天和月的最后一天进行循环。

将循环放到星期数组里面传到页面。

	
        private String currentDay;
	private String currentMonth;
	private List<String[]> weeksOfMonth;

	/**
	 * 分页.查询.排序.
	 */
	public String listSchedule() throws Exception {
		Calendar now = Calendar.getInstance();
		if (currentDay != null) {
			try {
				now.setTime(new SimpleDateFormat("yyyyMMdd")
						.parse(currentDay));
			} catch (Exception e) {

			}
		}
		Calendar dateFirst = Calendar.getInstance();
		dateFirst.set(Calendar.YEAR, now.get(Calendar.YEAR));
		dateFirst.set(Calendar.MONTH, now.get(Calendar.MONTH));
		dateFirst.set(Calendar.DATE, 1);
		//将当前天和当前月设置值
		currentDay = new SimpleDateFormat("yyyyMMdd").format(now.getTime());
		currentMonth = new SimpleDateFormat("yyyyMM").format(now.getTime());

		List<String> daysOfMonth = new ArrayList<String>();// 变量放日期
		weeksOfMonth = new ArrayList<String[]>();// 转换成的星期
		for (int i = 1; i < ((dateFirst.get(Calendar.DAY_OF_WEEK)+5)%7); i++) {// 添加1号前面的空格
			daysOfMonth.add("");
		}
		for (int i = 1; i <= now.getActualMaximum(Calendar.DATE); i++) {
			//now.getActualMaximum(Calendar.DATE)获得当月天数
			daysOfMonth.add(i + "");// 添加月下面的日期
		}
		for (int i = daysOfMonth.size(); i < 6 * 7; i++) {
			daysOfMonth.add("");// 添加月末后面的空格
		}
		for (int j = 0; j < daysOfMonth.size(); j = j + 7) {// 将数组转换成星期放到list里面
			String[] week = new String[7];
			int index = 0;
			week[index] = daysOfMonth.get(j + index++);// 星期一
			week[index] = daysOfMonth.get(j + index++);// 星期二
			week[index] = daysOfMonth.get(j + index++);// 星期三
			week[index] = daysOfMonth.get(j + index++);// 星期四
			week[index] = daysOfMonth.get(j + index++);// 星期五
			week[index] = daysOfMonth.get(j + index++);// 星期六
			week[index] = daysOfMonth.get(j + index++);// 星期日
			weeksOfMonth.add(week);
		}
		return SUCCESS;
	}

这里有个问题

(dateFirst.get(Calendar.DAY_OF_WEEK)+5)%7)

本来用

DAY_OF_WEEK

就可以获得星期，可是星期是从周日开始的。想从周一开始就得向后挪 5

在页面显示

<s:iterator value="weeksOfMonth" status="status" id="week">
		<fs:gridPanelDataTable4Date index="${status.index}">
			<fs:gridPanelDataColumn4Date width="6" height="40">&nbsp;</fs:gridPanelDataColumn4Date>
			<s:iterator begin="0" end="6" step="1" id="index"><!-- 进行星期的7天循环 -->
				<s:if test="${index} == 5 || ${index} == 6"><!-- 判断是否是周六，周日换背景为黄色 -->
					<fs:gridPanelDataColumn4Date width="100" height="40" style="background-color: #ffffcc;">
						<span class="scheduleDateWeekendDiv"><s:property value="${week[index]}"/></span>
						<s:if test="${week[index]} != ''">
						<a href="javaScript:showScheduleViewDiv('${currentMonth}<s:if test="${week[index]} < 10 ">0${week[index]}</s:if><s:else>${week[index]}</s:else>');">编辑</a>
						<a href="${ctx}/addUserInfo.action?id=<s:property value="id"/>">查看</a>
						</s:if>
					</fs:gridPanelDataColumn4Date>
				</s:if>
				<s:else>
					<fs:gridPanelDataColumn4Date width="100" height="40">
						<span class="scheduleDateWeekendDiv"><s:property value="${week[index]}"/></span>
						<s:if test="${week[index]} != ''">
						<a href="javaScript:showScheduleViewDiv('${currentMonth}<s:if test="${week[index]} < 10 ">0${week[index]}</s:if><s:else>${week[index]}</s:else>');">编辑</a>
						<a href="${ctx}/addUserInfo.action?id=<s:property value="id"/>">查看</a>
						</s:if>
					</fs:gridPanelDataColumn4Date>
				</s:else>
			</s:iterator>
		</fs:gridPanelDataTable4Date>
	</s:iterator>

其中用到了一些自己封装的标签。

效果图：

设计一个 oa 当中的日历显示跳转上月下月

上月下月的 action

/**
	 * 上一月
	 */
	public String prevMonthSchedule() throws Exception {
		Calendar now = Calendar.getInstance();
		if (currentDay != null) {
			try {
				now.setTime(new SimpleDateFormat("yyyyMMdd")
						.parse(currentDay));
			} catch (Exception e) {

			}
		}
		now.set(Calendar.MONTH, now.get(Calendar.MONTH) - 1);
		currentDay = new SimpleDateFormat("yyyyMMdd").format(now.getTime());
		System.out.println("currentDay:" + currentDay);
		return SUCCESS;
	}

	/**
	 * 下一月
	 */
	public String nextMonthSchedule() throws Exception {
		Calendar now = Calendar.getInstance();
		if (currentDay != null) {
			try {
				now.setTime(new SimpleDateFormat("yyyyMMdd")
						.parse(currentDay));
			} catch (Exception e) {

			}
		}
		now.set(Calendar.MONTH, now.get(Calendar.MONTH) + 1);
		currentDay = new SimpleDateFormat("yyyyMMdd").format(now.getTime());
		System.out.println("currentDay:" + currentDay);
		return SUCCESS;
	}

源代码和 oa 放到一起了

demo:

http://freeweboa.appspot.com/index.html

里面的日程管理

下载地址：

http://code.google.com/p/freewebsys/downloads/list