以前初学java写万年历,都是采用基本的算法求出是否闰年闰月 计算公式如下
int year = 2014, month = 8, total = 0; if (month == 1 || month == 3 || month == 5 || month == 7 || month == 8 || month == 10 || month == 12) { total = 31; } else if (month == 2) { if ((year % 4 == 0 && year % 100 != 0) || (year % 400 == 0)) { total = 29; } else { total = 28; } } else { total = 30; }total 即为当月天数
忽然觉得,其实java 有个Calendar类 这个就可以获取当月有多少天,实现日历的核心就是获取当月有多少天。
因项目需要只需列出当月日历即可,无需其他
编写代码 生成html
package Str; import java.util.Calendar; /** * * * @project Tool * @type Test8 * @Description * @author xuyw * @email xyw10000@163.com * @date 2014-8-9 下午01:45:02 * @version 1.0 * */ public class Test8 { /** * @param args */ public static void main(String[] args) { Calendar calendar = Calendar.getInstance(); calendar.add(Calendar.MONTH, 0); calendar.set(Calendar.DAY_OF_MONTH, 1);// 设置为1号,当前日期既为本月第一天 int firstDay = calendar.get(Calendar.DAY_OF_WEEK) - 1; int monthDays = calendar.getActualMaximum(Calendar.DAY_OF_MONTH);// 当月最后一天 StringBuilder sbd = new StringBuilder(); sbd.append("<table cellspacing='0' style='background: url(./img/body.png);'>"); sbd.append("<thead><tr>"); sbd .append("<th>星期天</th><th>星期一</th><th>星期二</th><th>星期三</th><th>星期四</th><th>星期五</th><th>星期六</th>"); sbd.append("</tr></thead>"); sbd.append("<tbody><tr>"); // 第一行 int weekend = 0;// 每周的最后一天的日期 for (int i = 0; i < 7; i++) { if (i < firstDay) { sbd.append("<td></td>"); } else { sbd.append("<td>" + (i - firstDay + 1) + "</td>"); } weekend = i - firstDay + 1; } sbd.append("</tr>"); while (weekend < monthDays) { sbd.append("<tr>"); for (int i = 0; i < 7; i++) { if (weekend + i < monthDays)// 数字小于等于当前月的最后一天 { sbd.append("<td>" + (i + weekend + 1) + "</td>"); } else { sbd.append("<td></td>"); } } sbd.append("</tr>"); weekend += 7;// 周末再加7天 } sbd.append("<tbody></table>"); System.out.println(sbd.toString()); } }
css
* { /* old-style reset here :) */ border: 0px; padding: 0px; } body { font-family: Helvetica; background: white; text-align: center; /* background: url(../img/body.png) repeat-x; */} body h1 { padding-top: 20px; font-size: 36px; color: #335; } p{font-size:26px;} table { border-collapse: separate; border: 1px solid #9DABCE; border-width: 1px 1px 1px 1px; margin: 10px auto; font-size: 30px; } td, th { width: 81px; height: 81px; text-align: center; vertical-align: middle; /*background: url(../img/cells.png);*/ color: #444; position: relative; } th { height: 30px; font-weight: bold; font-size: 14px; } td.sign_in { background-position: 81px 0px; color: red; } td.sign_no{ background: url(../img/cells.png); }
原文:http://blog.csdn.net/xuyw10000/article/details/38455789