date日期类型与String类型的相互转化

野性酷女 2024-02-17 20:11 53阅读 0赞

Code:

1.  import java.sql.Timestamp;
2.  import java.text.DateFormat;
3.  import java.text.ParseException;
4.  import java.text.SimpleDateFormat;
5.  import java.util.Date;
6.  
7.  import org.apache.commons.logging.Log;
8.  import org.apache.commons.logging.LogFactory;
9.  
10. /\*\*
11.  \* @author zxw
12.  \*
13.  \*/
14. public class DateUtil \{
15. private static final Log log = LogFactory.getLog(DateUtil.class);
16. 
17. /\*\*
18.  \* 将时间字符串转换为Date类型
19.  \* @param dateStr
20.  \* @return Date
21.  \*/
22. public static Date toDate(String dateStr) \{
23. Date date = null;
24. SimpleDateFormat formater = new SimpleDateFormat();
25. formater.applyPattern("yyyy-MM-dd");
26. try \{
27. date = formater.parse(dateStr);
28. \} catch (ParseException e) \{
29. e.printStackTrace();
30. \}
31. return date;
32. \}
33. 
34. /\*\*
35.  \* 按照提供的格式将字符串转换成Date类型
36.  \* @param dateStr
37.  \* @param formaterString
38.  \* @return
39.  \*/
40. public static Date toDate(String dateStr, String formaterString) \{
41. Date date = null;
42. SimpleDateFormat formater = new SimpleDateFormat();
43. formater.applyPattern(formaterString);
44. try \{
45. date = formater.parse(dateStr);
46. \} catch (ParseException e) \{
47. e.printStackTrace();
48. \}
49. return date;
50. \}
51. 
52. /\*\*
53.  \* 将Date类型时间转换为字符串
54.  \* @param date
55.  \* @return
56.  \*/
57. public static String toString(Date date) \{
58. 
59. String time;
60. SimpleDateFormat formater = new SimpleDateFormat();
61. formater.applyPattern("yyyy-MM-dd");
62. time = formater.format(date);
63. return time;
64. \}
65. 
66. /\*\*
67.  \* 按照参数提供的格式将Date类型时间转换为字符串
68.  \* @param date
69.  \* @param formaterString
70.  \* @return
71.  \*/
72. public static String toString(Date date, String formaterString) \{
73. String time;
74. SimpleDateFormat formater = new SimpleDateFormat();
75. formater.applyPattern(formaterString);
76. time = formater.format(date);
77. return time;
78. \}
79. 
80. /\*\*
81.  \* method 将字符串类型的日期转换为一个timestamp（时间戳记java.sql.Timestamp）
82.  \* @param dateString
83.  \* 需要转换为timestamp的字符串
84.  \* @return dataTime timestamp
85.  \*/
86. public final static java.sql.Timestamp string2Time(String dateString)
87. throws java.text.ParseException \{
88. DateFormat dateFormat;
89. // dateFormat = new SimpleDateFormat("yyyy-MM-dd kk:mm:ss.SSS",
90. // Locale.ENGLISH);// 设定格式
91. dateFormat = new SimpleDateFormat("yyyy-MM-dd kk:mm");
92. dateFormat.setLenient(false);
93. java.util.Date timeDate = dateFormat.parse(dateString);// util类型
94. java.sql.Timestamp dateTime = new java.sql.Timestamp(timeDate.getTime());// Timestamp类型,timeDate.getTime()返回一个long型
95. return dateTime;
96. \}
97. 
98. /\*\*
99.  \* method 将字符串类型的日期按照转换为一个timestamp（时间戳记java.sql.Timestamp）
100.  \* 
101.  \* @param dateString 需要转换为timestamp的字符串
102.  \* @param formaterString dateString字符串的解析格式
103.  \* @return
104.  \* @throws java.text.ParseException
105.  \*/
106. public final static java.sql.Timestamp string2Time(String dateString,
107. String formaterString) throws java.text.ParseException \{
108. DateFormat dateFormat;
109. dateFormat = new SimpleDateFormat(formaterString);// 设定格式
110. // dateFormat = new SimpleDateFormat("yyyy-MM-dd kk:mm:ss");
111. dateFormat.setLenient(false);
112. java.util.Date timeDate = dateFormat.parse(dateString);// util类型
113. java.sql.Timestamp dateTime = new java.sql.Timestamp(timeDate.getTime());// Timestamp类型,timeDate.getTime()返回一个long型
114. return dateTime;
115. \}
116. 
117. public static void main(String\[\] args) throws ParseException \{
118. String t = DateUtil.toString(new Date());
119. System.out.println(t);
120. Date date = DateUtil.toDate("2010-06-17");
121. System.out.println(date);
122. 
123. // String sToTimestamp = "2005-8-18 14:21:12.123";// 用于转换成java.sql.Timestamp的字符串
124. String sToTimestamp = "2005-8-18 14:21";// 用于转换成java.sql.Timestamp的字符串
125. Timestamp Timestamp = string2Time(sToTimestamp);
126. System.out.println(Timestamp);
127. 
128. \}
129. 
130. \}