Conversion between date and string in Java

1: General Ideas

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2. This conversion is going to use the Java.text.SimpleDateFormat class
6. The string is converted into a date type:
8. Method 1:
12. The simplest method is the date date=new Date ("2008-04-14");
16. Method 2:
20. SimpleDateFormat sdf=new SimpleDateFormat ("Yyyy-mm-dd");//lowercase MM indicates minutes
22. String dstr="2008-4-24";
24. Java.util.Date date=sdf.parse (DSTR);
32. The date is converted into a string:
36. SimpleDateFormat sdf=new SimpleDateFormat ("Yyyy-mm-dd");
38. Java.util.Date date=new Java.util.Date ();
40. String str=sdf.format (date);

2: program Instance

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2. Package test;
4. Import Java.text.DateFormat;
6. Import Java.text.SimpleDateFormat;
8. Import java.text.ParseException;
10. Import Java.util.Date;
12. public class Stringordate {
14. public static string datetostring (date date, String type) {
16. String str = null;
18. DateFormat format = new SimpleDateFormat ("Yyyy-mm-dd");
20. if (Type.equals ("short")) {
22. 07-1-18
24. format = dateformat.getdateinstance (dateformat.short);
26. str = Format.format (date);
28. } else if (Type.equals ("MEDIUM")) {
30. 2007-1-18
32. format = dateformat.getdateinstance (dateformat.medium);
34. str = Format.format (date);
36. } else if (Type.equals ("full")) {
38. Thursday, January 18, 2007
40. format = dateformat.getdateinstance (dateformat.full);
42. str = Format.format (date);
44. }
46. return str;
48. }
50. public static Date stringtodate (String str) {
52. DateFormat format = new SimpleDateFormat ("Yyyy-mm-dd");
54. Date date = null;
56. try {
58. Fri Feb 00:00:00 CST 2012
60. date = format.parse (str);
62. } catch (ParseException e) {
64. E.printstacktrace ();
66. }
68. 2012-02-24
70. date = java.sql.Date.valueOf (str);
74. return date;
76. }
78. public static void Main (string[] args) {
80. Date date = new Date ();
82. System.out.println (stringordate.datetostring (date, "MEDIUM"));
84. String str = "2012-2-24";
86. SYSTEM.OUT.PRINTLN (Stringordate.stringtodate (str));
88. }

Conversion between date and string in Java