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());  
        }  
    }  

先前测试就用控制台生成html标签   将生成的html标签在页面展示即可 效果图如下
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);  
    }