date日期类型与String类型的相互转化

桃扇骨 2024-02-17 20:07 122阅读 0赞

Code:

  1. import java.text.ParseException;
  2. import java.text.SimpleDateFormat;
  3. import java.util.Date;
  5. import org.apache.log4j.Logger;
  7. import com.fourstar.log4j.HelloLog4j;
  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;
  22. }
  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;
  35. }
  37. public static String toString(Date date) {
  39. String time;
  40. SimpleDateFormat formater = new SimpleDateFormat();
  42. formater.applyPattern(“yyyy-MM-dd hh:m:ss”);
  43. time = formater.format(date);
  45. return time;
  46. }
  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. }
  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. }
  65. }

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