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本篇文章为大家展示了使用java怎么实现一个全年考勤日历，内容简明扼要并且容易理解，绝对能使你眼前一亮，通过这篇文章的详细介绍希望你能有所收获。
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JAVA代码：
package com.wp.action;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.HashMap;
public class CalendarAction extends MainAction {
private static final long serialVersionUID = 1L;
private int maxCols;
private String html;
private String clickDate;
public String getClickDate() {
return clickDate;
}
public void setClickDate(String clickDate) {
this.clickDate = clickDate;
}
public String init() {
Calendar cal = Calendar.getInstance();
int month = cal.get(Calendar.MONTH) + 1;
initMaxCols();
html = createTbl();
return SUCCESS;
}
private void initMaxCols() {
// 每行开头灰色的格数
int headDisabledDays;
// 当月的天数
int oneMonthDays;
Calendar cal = Calendar.getInstance();
cal.set(Calendar.DAY_OF_MONTH, 1);
for (int i = 0; i < 12; i++) {
if (cal.get(Calendar.DAY_OF_WEEK) == Calendar.SUNDAY) {
// 周日空六格
headDisabledDays = 6;
} else {
headDisabledDays = cal.get(Calendar.DAY_OF_WEEK)
- Calendar.MONDAY;
}
oneMonthDays = cal.getActualMaximum(Calendar.DAY_OF_MONTH);
if (headDisabledDays + oneMonthDays > maxCols) {
maxCols = headDisabledDays + oneMonthDays;
}
cal.add(Calendar.MONTH, 1);
}
}
private String createTbl() {
StringBuffer html = new StringBuffer();
String[] weekdays = { "一", "二", "三", "四", "五", "六", "日" };
SimpleDateFormat formatTd = new SimpleDateFormat("yyyyMMdd");
SimpleDateFormat formatHeader = new SimpleDateFormat("yyyy年MM月");
SimpleDateFormat formatTitle = new SimpleDateFormat("yyyy年MM月dd日");
HashMap map = getCalendarDetail();
// 每行开头灰色的格数
int headDisabledDays;
// html.append("\r\n");
html.append("\r\n");
html.append("");
html.append(weekdays[col % weekdays.length]);
html.append(" \r\n");
}
html.append(" \r\n");
Calendar cal = Calendar.getInstance();
int month = cal.get(Calendar.MONTH);
for (int months = 0; months < 12; months++) {
html.append("\r\n");
String s;
s = formatHeader.format(cal.getTime());
html.append("" + s + "\r\n");
cal.set(Calendar.DAY_OF_MONTH, 1);
if (cal.get(Calendar.DAY_OF_WEEK) == Calendar.SUNDAY) {
// 周日空六格
headDisabledDays = 6;
} else {
headDisabledDays = cal.get(Calendar.DAY_OF_WEEK)
- Calendar.MONDAY;
}
cal.add(Calendar.DAY_OF_MONTH, -headDisabledDays);
for (int col = 0; col < maxCols; col++) {
html.append(" 0) {
// html.append("class='disabledTd'");
// }else
if (month != cal.get(Calendar.MONTH)) {
html.append("class='disabledTd'");
} else if (map.containsKey(formatTd.format(cal.getTime()))) {
int type = Integer.parseInt(map.get(formatTd.format(cal
.getTime())));
if(type == 1){
//html.append("class='holidayTd'");
}else if(type == 2){
html.append("class='holidayTd'");
}
} else if (cal.get(Calendar.DAY_OF_WEEK) == Calendar.SATURDAY
|| cal.get(Calendar.DAY_OF_WEEK) == Calendar.SUNDAY) {
html.append("class='weekendTd'");
} else {
html.append("class='generalTd'");
}
html.append(" title='" + formatTitle.format(cal.getTime())
+ "'");
html.append(">");
html.append(cal.get(Calendar.DAY_OF_MONTH));
html.append("\r\n");
cal.add(Calendar.DAY_OF_MONTH, 1);
}
html.append(" \r\n");
if (month == cal.get(Calendar.MONTH)) {
cal.add(Calendar.MONTH, 1);
}
month = cal.get(Calendar.MONTH);
}
// html.append("\r\n");
return html.toString();
}
public String getHtml() {
return html;
}
public void setHtml(String html) {
this.html = html;
}
private HashMap getCalendarDetail() {
HashMap map;
map = new HashMap();
map.put("20150404", "2");
map.put("20150405", "2");
map.put("20150406", "2");
map.put("20150501", "2");
map.put("20150502", "2");
map.put("20150503", "2");
map.put("20150622", "2");
map.put("20151001", "2");
map.put("20151002", "2");
map.put("20151003", "2");
return map;
}
public String dateCellClick(){
return SUCCESS;
}
} action配置：