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

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01.package vivi.test;
02.
03.import java.util.Calendar;
04./**
05. *
06. * 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
07. * 1、得到当前日期 today()
08. * 2、得到当前月份月初 thisMonth()
09. * 3、得到当前月份月底 thisMonthEnd()
10. * 4、得到当前季度季初 thisSeason()
11. * 5、得到当前季度季末 thisSeasonEnd()
12. * 6、得到当前年份年初 thisYear()
13. * 7、得到当前年份年底 thisYearEnd()
14. * 8、判断输入年份是否为闰年 leapYear
15. * 注意事项: 日期格式为：xxxx-yy-zz (eg: 2007-12-05)
16. * 实例:
17. * @author pure
18. */
19.public class Test {
20. private int x; // 日期属性：年
21. private int y; // 日期属性：月
22. private int z; // 日期属性：日
23. private Calendar localTime; // 当前日期
24.
25. public Test() {
26. localTime = Calendar.getInstance();
27. }
28.
29. public static void main(String[] args){
30. Test test = new Test();
31. test.today();
32. }
33. /**
34. * 功能：得到当前日期格式为：xxxx-yy-zz (eg: 2007-12-05)
35. * @return String
36. * @author pure
37. */
38. public String today() {
39. String strY = null;
40. String strZ = null;
41. x = localTime.get(Calendar.YEAR);
42. y = localTime.get(Calendar.MONTH) + 1;
43. z = localTime.get(Calendar.DATE);
44. strY = y >= 10 ? String.valueOf(y) : ("0" + y);
45. strZ = z >= 10 ? String.valueOf(z) : ("0" + z);
46. return x + "-" + strY + "-" + strZ;
47. }
48. /**
49. * 功能：得到当前月份月初格式为：xxxx-yy-zz (eg: 2007-12-01)
50. * @return String
51. * @author pure
52. */
53. public String thisMonth() {
54. String strY = null;
55. x = localTime.get(Calendar.YEAR);
56. y = localTime.get(Calendar.MONTH) + 1;
57. strY = y >= 10 ? String.valueOf(y) : ("0" + y);return x + "-" + strY + "-01";
58. }
59. /**
60. * 功能：得到当前月份月底格式为：xxxx-yy-zz (eg: 2007-12-31)
61. * @return String
62. * @author pure
63. **/
64. public String thisMonthEnd() {
65. String strY = null;
66. String strZ = null;
67. boolean leap = false;
68. x = localTime.get(Calendar.YEAR);
69. y = localTime.get(Calendar.MONTH) + 1;
70. if (y == 1 || y == 3 || y == 5 || y == 7 || y == 8 || y == 10 || y == 12) {
71. strZ = "31";
72. }
73. if (y == 4 || y == 6 || y == 9 || y == 11) {
74. strZ = "30";
75. }
76. if (y == 2) {
77. leap = leapYear(x);
78. if (leap) {
79. strZ = "29";
80. }else {
81. strZ = "28";
82. }
83. }
84. strY = y >= 10 ? String.valueOf(y) : ("0" + y);
85. return x + "-" + strY + "-" + strZ;
86. }
87.
88. /**
89. * 功能：得到当前季度季初格式为：xxxx-yy-zz (eg: 2007-10-01) 
90. * @return String
91. * @author pure
92. */
93. public String thisSeason() {
94. String dateString = "";
95. x = localTime.get(Calendar.YEAR);
96. y = localTime.get(Calendar.MONTH) + 1;
97. if (y >= 1 && y <= 3) {
98. dateString = x + "-" + "01" + "-" + "01";
99. }
100. if (y >= 4 && y <= 6) {
101. dateString = x + "-" + "04" + "-" + "01";
102. }
103. if (y >= 7 && y <= 9) {
104. dateString = x + "-" + "07" + "-" + "01";
105. }
106. if (y >= 10 && y <= 12) {
107. dateString = x + "-" + "10" + "-" + "01";
108. }
109. return dateString;
110. }
111.
112. /**
113. * 功能：得到当前季度季末格式为：xxxx-yy-zz (eg: 2007-12-31) 
114. * @return String
115. * @author pure
116. */
117. public String thisSeasonEnd() {
118. String dateString = "";
119. x = localTime.get(Calendar.YEAR);
120. y = localTime.get(Calendar.MONTH) + 1;
121. if (y >= 1 && y <= 3) {
122. dateString = x + "-" + "03" + "-" + "31";
123. }
124. if (y >= 4 && y <= 6) {
125. dateString = x + "-" + "06" + "-" + "30";
126. }
127. if (y >= 7 && y <= 9) {
128. dateString = x + "-" + "09" + "-" + "30";
129. }
130. if (y >= 10 && y <= 12) {
131. dateString = x + "-" + "12" + "-" + "31";
132. }
133. return dateString;
134. }
135.
136. /**
137. * 功能：得到当前年份年初格式为：xxxx-yy-zz (eg: 2007-01-01) 
138. * @return String
139. * @author pure
140. */
141. public String thisYear() {
142. x = localTime.get(Calendar.YEAR);
143. return x + "-01" + "-01";
144. }
145.
146. /**
147. * 功能：得到当前年份年底格式为：xxxx-yy-zz (eg: 2007-12-31) 
148. * @return String
149. * @author pure
150. */
151. public String thisYearEnd() {
152. x = localTime.get(Calendar.YEAR);
153. return x + "-12" + "-31";
154. }
155.
156. /**
157. * 功能：判断输入年份是否为闰年 
158. * @param year
159. * @return 是：true 否：false
160. * @author pure
161. */
162. public boolean leapYear(int year) {
163. boolean leap;
164. if (year % 4 == 0) {
165. if (year % 100 == 0) {
166. if (year % 400 == 0) leap = true;
167. else leap = false;
168. }
169. else leap = true;
170. }
171. else leap = false;
172. return leap;
173. }
174.}