Java用于取得当前日期相对应的月初，月末，季初，季末，年初，年末时间

  1 package com.zrar.date;
  2 import java.util.Calendar;
  3 /**
  4  * 
  5  * 描述:此类用于取得当前日期相对应的月初，月末，季初，季末，年初，年末，返回值均为String字符串
  6  *      1、得到当前日期         today()
  7  *      2、得到当前月份月初      thisMonth()
  8  *      3、得到当前月份月底      thisMonthEnd()
  9  *      4、得到当前季度季初      thisSeason()
 10  *      5、得到当前季度季末      thisSeasonEnd()
 11  *      6、得到当前年份年初      thisYear()
 12  *      7、得到当前年份年底      thisYearEnd()
 13  *      8、判断输入年份是否为闰年 leapYear
 14  *      
 15  * 注意事项:  日期格式为：xxxx-yy-zz (eg: 2007-12-05)
 16  *
 17  * 实例:
 18  *
 19  * @author pure
 20  */
 21 public class DateThis {
 22     private int x;                  // 日期属性：年
 23     private int y;                  // 日期属性：月
 24     private int z;                  // 日期属性：日
 25     private Calendar localTime;     // 当前日期
 26     public DateThis() {
 27         localTime = Calendar.getInstance();
 28     }
 29     /**
 30      * 功能：得到当前日期 格式为：xxxx-yy-zz (eg: 2007-12-05)<br> 
 31      * @return String
 32      * @author pure
 33      */
 34     public String today() {
 35         String strY = null;
 36         String strZ = null;
 37         x = localTime.get(Calendar.YEAR);
 38         y = localTime.get(Calendar.MONTH) + 1;
 39         z = localTime.get(Calendar.DATE);
 40         strY = y >= 10 ? String.valueOf(y) : ("0" + y);
 41         strZ = z >= 10 ? String.valueOf(z) : ("0" + z);
 42         return x + "-" + strY + "-" + strZ;
 43     }
 44     /**
 45      * 功能：得到当前月份月初 格式为：xxxx-yy-zz (eg: 2007-12-01)<br> 
 46      * @return String
 47      * @author pure
 48      */
 49     public String thisMonth() {
 50         String strY = null;
 51         x = localTime.get(Calendar.YEAR);
 52         y = localTime.get(Calendar.MONTH) + 1;
 53         strY = y >= 10 ? String.valueOf(y) : ("0" + y);
 54         return x + "-" + strY + "-01";
 55     }
 56     /**
 57      * 功能：得到当前月份月底 格式为：xxxx-yy-zz (eg: 2007-12-31)<br> 
 58      * @return String
 59      * @author pure
 60      */
 61     public String thisMonthEnd() {
 62         String strY = null;
 63         String strZ = null;
 64         boolean leap = false;
 65         x = localTime.get(Calendar.YEAR);
 66         y = localTime.get(Calendar.MONTH) + 1;
 67         if (y == 1 || y == 3 || y == 5 || y == 7 || y == 8 || y == 10 || y == 12) {
 68             strZ = "31";
 69         }
 70         if (y == 4 || y == 6 || y == 9 || y == 11) {
 71             strZ = "30";
 72         }
 73         if (y == 2) {
 74             leap = leapYear(x);
 75             if (leap) {
 76                 strZ = "29";
 77             }
 78             else {
 79                 strZ = "28";
 80             }
 81         }
 82         strY = y >= 10 ? String.valueOf(y) : ("0" + y);
 83         return x + "-" + strY + "-" + strZ;
 84     }
 85     /**
 86      * 功能：得到当前季度季初 格式为：xxxx-yy-zz (eg: 2007-10-01)<br> 
 87      * @return String
 88      * @author pure
 89      */
 90     public String thisSeason() {
 91         String dateString = "";
 92         x = localTime.get(Calendar.YEAR);
 93         y = localTime.get(Calendar.MONTH) + 1;
 94         if (y >= 1 && y <= 3) {
 95             dateString = x + "-" + "01" + "-" + "01";
 96         }
 97         if (y >= 4 && y <= 6) {
 98             dateString = x + "-" + "04" + "-" + "01";
 99         }
100         if (y >= 7 && y <= 9) {
101             dateString = x + "-" + "07" + "-" + "01";
102         }
103         if (y >= 10 && y <= 12) {
104             dateString = x + "-" + "10" + "-" + "01";
105         }
106         return dateString;
107     }
108     /**
109      * 功能：得到当前季度季末 格式为：xxxx-yy-zz (eg: 2007-12-31)<br> 
110      * @return String
111      * @author pure
112      */
113     public String thisSeasonEnd() {
114         String dateString = "";
115         x = localTime.get(Calendar.YEAR);
116         y = localTime.get(Calendar.MONTH) + 1;
117         if (y >= 1 && y <= 3) {
118             dateString = x + "-" + "03" + "-" + "31";
119         }
120         if (y >= 4 && y <= 6) {
121             dateString = x + "-" + "06" + "-" + "30";
122         }
123         if (y >= 7 && y <= 9) {
124             dateString = x + "-" + "09" + "-" + "30";
125         }
126         if (y >= 10 && y <= 12) {
127             dateString = x + "-" + "12" + "-" + "31";
128         }
129         return dateString;
130     }
131     /**
132      * 功能：得到当前年份年初 格式为：xxxx-yy-zz (eg: 2007-01-01)<br> 
133      * @return String
134      * @author pure
135      */
136     public String thisYear() {
137         x = localTime.get(Calendar.YEAR);
138         return x + "-01" + "-01";
139     }
140     /**
141      * 功能：得到当前年份年底 格式为：xxxx-yy-zz (eg: 2007-12-31)<br> 
142      * @return String
143      * @author pure
144      */
145     public String thisYearEnd() {
146         x = localTime.get(Calendar.YEAR);
147         return x + "-12" + "-31";
148     }
149     /**
150      * 功能：判断输入年份是否为闰年<br>
151      * 
152      * @param year
153      * @return 是：true  否：false
154      * @author pure
155      */
156     public boolean leapYear(int year) {
157         boolean leap;
158         if (year % 4 == 0) {
159             if (year % 100 == 0) {
160                 if (year % 400 == 0) leap = true;
161                 else leap = false;
162             }
163             else leap = true;
164         }
165         else leap = false;
166         return leap;
167     }
168 }