1 package com.honghailt.dataextracter.utils;
2
3 import java.text.ParseException;
4 import java.text.SimpleDateFormat;
5 import java.util.ArrayList;
6 import java.util.Calendar;
7 import java.util.Date;
8 import java.util.List;
9
10 public class CalendarUtil {
11
12 //下月第一天
13 public static Date getNextMonth(Date beginTime) {
14 Calendar c = Calendar.getInstance();
15 c.setTime(beginTime);
16 c.set(Calendar.MONTH, c.get(Calendar.MONTH) + 1);
17 c.set(Calendar.DAY_OF_MONTH, 1);
18 return c.getTime();
19 }
20
21 //当天几号
22 public static int getMonthOfDate(Date date) {
23 Calendar c = Calendar.getInstance();
24 c.setTime(date);
25 return c.get(Calendar.DAY_OF_MONTH);
26 }
27 //当月有多少天
28 public static int getLastDayOfMonth(Date date) {
29 Calendar c = Calendar.getInstance();
30 c.setTime(date);
31 int month = c.getActualMaximum(Calendar.DATE);
32 return month;
33 }
34
35 //当前月 -1
36 public static int getMonth(Date date) {
37 Calendar c = Calendar.getInstance();
38 c.setTime(date);
39 int month = c.get(Calendar.MONTH);
40 return month;
41 }
42
43 //当月第一天
44 public static Date getFirstDayOfMonth(Date beginTime){
45 Calendar c = Calendar.getInstance();
46 c.setTime(beginTime);
47 c.set(Calendar.DAY_OF_MONTH, 1);
48 return c.getTime();
49 }
50
51 //获得当周第几天 i=0表示星期一
52 public static String getNowWeekBegin(Date date,int i) {
53 Calendar cd = Calendar.getInstance();
54 cd.setTime(date);
55 cd.set(Calendar.DAY_OF_WEEK, Calendar.MONTH +i);
56 if(i==6){
57 cd.set(Calendar.DAY_OF_WEEK, Calendar.MONTH+5);
58 cd.add(cd.DATE, 1);
59 }
60 Date monday =cd.getTime();
61 SimpleDateFormat df=new SimpleDateFormat("yyyy-MM-dd");
62 String preMonday = df.format(monday);
63 return preMonday ;
64 }
65
66 //获得当周第几天，返回日期形。i=0表示星期一
67 public static Date getNowWeekBeginDate(Date date,int i) {
68 Calendar cd = Calendar.getInstance();
69 cd.setTime(date);
70 cd.set(Calendar.DAY_OF_WEEK, Calendar.MONTH +i);
71 if(i==6){
72 cd.set(Calendar.DAY_OF_WEEK, Calendar.MONTH+5);
73 cd.add(cd.DATE, 1);
74 }
75 Date monday =cd.getTime();
76 return monday ;
77 }
78 //获得本周日期
79 public static List<String> getDaysOfWeek(Date date){
80 List<String> days = new ArrayList<String>();
81 for (int i = 0; i < 7; i++) {
82 days.add(getNowWeekBegin(date,i));
83 }
84 return days;
85 }
86 //获得本周日期
87 public static List<Date> getDaysOfWeekDate(Date date){
88 List<Date> days = new ArrayList<Date>();
89 for (int i = 0; i < 7; i++) {
90 days.add(getNowWeekBeginDate(date,i));
91 }
92 return days;
93 }
94
95 /**
96 * 获得当月第几周
97 * @param date
98 * @param week
99 * @return
100 */
101 public static List<String> getWeeksOfMonth(Date date,int week){
102 int day =7*week+1;
103 Calendar c = Calendar.getInstance();
104 c.setTime(date);
105 c.set(Calendar.DAY_OF_MONTH, day);
106 return getDaysOfWeek(c.getTime());
107 }
108
109 //本月最后一天
110 public static Date getDateOfLastDayOfMonth(Date date){
111 Calendar c = Calendar.getInstance();
112 c.setTime(date);
113 c.set(Calendar.DAY_OF_MONTH, c.getActualMaximum(Calendar.DATE));
114 return c.getTime();
115 }
116 //获得本月第几天,0表示第一天
117 public static Date getDayOfMonth(Date date,int i){
118 Calendar c = Calendar.getInstance();
119 c.setTime(date);
120 c.set(Calendar.DAY_OF_MONTH, i+1);
121 return c.getTime();
122 }
123 //本月共几周
124 public static int getWeekyofMonth(Date date){
125 Date d1 = getFirstDayOfMonth(date);//第一天
126 Date d2 = getDateOfLastDayOfMonth(date);//最后一天
127 Date mon1 =getNowWeekBeginDate(d1,0);//第一天所在周星期一
128 Date mon2 =getNowWeekBeginDate(d2,0);//最后一天所在周星期一
129 return (int) ((mon2.getTime()-mon1.getTime())/3600/24/1000)/7;
130 }
131 public static List<String> getWeekName(){
132 List<String> list = new ArrayList<String>();
133 list.add("周一");
134 list.add("周二");
135 list.add("周三");
136 list.add("周四");
137 list.add("周五");
138 list.add("周六");
139 list.add("周日");
140 return list;
141
142 }
143 /**
144 * 首先获得 定一个时间，就2014-07-14为单周
145 * 然后获得传过来日期的星期一与这个时间除以7.
146 * 然后结果除以2，如果余数是0，这是单周，否则是双周
147 * @param date
148 * @return
149 */
150 public static String getDanShuangWeek(Date date){
151 Date beginDate =StringToDate("2014-07-14");
152 Date nowDate =getNowWeekBeginDate(date,0);
153 int temp = (int) ((nowDate.getTime() -beginDate.getTime())/3600/24/1000);
154 int danshuang=temp%2;
155 String str=null;
156 if(danshuang==0){
157 str="单周";
158 }else{
159 str="双周";
160 }
161 return str;
162 }
163
164 public static int getDanShuangWeekInt(Date date){
165 Date beginDate =StringToDate("2014-07-14");
166
167 Date nowDate =getNowWeekBeginDate(date,0);
168 int temp = (int) ((nowDate.getTime() -beginDate.getTime())/3600/24/1000);
169 int danshuang=temp%2;
170 return danshuang;
171 }
172
173 public static Date StringToDate(String strDate){
174 SimpleDateFormat df=new SimpleDateFormat("yyyy-MM-dd");
175 Date date =null;
176 try {
177 date = df.parse(strDate);
178 } catch (ParseException e) {
179 // TODO Auto-generated catch block
180 e.printStackTrace();
181 }
182 return date;
183 }
184
185 public static Date DateToDate(Date date){
186 SimpleDateFormat df=new SimpleDateFormat("yyyy-MM-dd");
187 String strDate= df.format(date);
188 return StringToDate(strDate);
189 }
190
191 public static void main(String[] args) {
192 // System.out.println(getDanShuangWeek(StringToDate("2014-08-02"))); ;
193 // System.out.println(getDayOfMonth(new Date(),10));
194 System.out.println(DateToDate(new Date()));
195 }
196 }
