date日期类型与String类型的相互转化

桃扇骨 2024-02-17 20:07 11阅读 0赞

Code:

1.  import java.text.ParseException;
2.  import java.text.SimpleDateFormat;
3.  import java.util.Date;
4.  
5.  import org.apache.log4j.Logger;
6.  
7.  import com.fourstar.log4j.HelloLog4j;
8.  
9.  public class DateUtil \{
10. private static final Logger log = Logger.getLogger(HelloLog4j.class);//获得当前类 
11. public static Date toDate(String dateStr) \{
12. Date date = null;
13. SimpleDateFormat formater = new SimpleDateFormat();
14. formater.applyPattern("yyyy-MM-dd hh:m:ss");
15. try \{
16. date = formater.parse(dateStr);
17. \} catch (ParseException e) \{
18. e.printStackTrace();
19. \}
20. return date;
21. 
22. \}
23. 
24. public static Date toDate(String dateStr, String f) \{
25. Date date = null;
26. SimpleDateFormat formater = new SimpleDateFormat();
27. formater.applyPattern(f);
28. try \{
29. date = formater.parse(dateStr);
30. \} catch (ParseException e) \{
31. e.printStackTrace();
32. \}
33. return date;
34. 
35. \}
36. 
37. public static String toString(Date date) \{
38. 
39. String time;
40. SimpleDateFormat formater = new SimpleDateFormat();
41. 
42. formater.applyPattern("yyyy-MM-dd hh:m:ss");
43. time = formater.format(date);
44. 
45. return time;
46. \}
47. 
48. public static String toString(Date date, String f) \{
49. String time;
50. SimpleDateFormat formater = new SimpleDateFormat();
51. formater.applyPattern(f);
52. time = formater.format(date);
53. return time;
54. \}
55. 
56. public static void main(String\[\] args) \{
57. Date todayDate = new Date();//date类型
58. System.out.println(todayDate);
59. String t = DateUtil.toString(todayDate,"yyyy-MM-dd hh:m:ss");//string类型
60. System.out.println(t);
61. todayDate = DateUtil.toDate(t, "yyyy-MM-dd hh:m:ss");//date类型
62. System.out.println(todayDate);
63. \}
64. 
65. \}