【Java】String和Date、Timestamp之间的转换

首先，定义一个Format的日期格式：

SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

一、String与Date（java.util.Date）互转

         // String ---> Date
         String sinceTime = "2014-01-26 14:34:14";
         Date date = new Date();
         System.out.println("date = " + date);
         try {
             date = df.parse(sinceTime); // 将sinceTime转为date类型
         } catch (ParseException e) {
             System.out.println("sinceTime = " + sinceTime);
         }
         System.out.println("date format = " + date);
         System.out.println("date to long = " + date.getTime());

         // Date ---> String
         String dateStr = "";
         dateStr = df.format(date);
         System.out.println("date String = " + dateStr);

二、String与Timestamp互转

         // String ---> Timestamp
         Timestamp ts = new Timestamp(System.currentTimeMillis());
         String timeStr = "2014-01-26 14:34:14";
         ts = Timestamp.valueOf(timeStr);
         System.out.println("timestamp = " + ts);

         // Timestamp ---> String
         String tsStr = "";
         try {
             // 方法一
             tsStr = df.format(ts);
             System.out.println("Timestamp -> String " + tsStr);
             // 方法二
             tsStr = ts.toString();
             System.out.println("Timestamp -> String " + tsStr);
         } catch (Exception e) {
             e.printStackTrace();
         }

三、Date（ java.util.Date ）和Timestamp互转

         // Timestamp ---> Date
         try {
             date = ts;
             System.out.println("Timestamp -> Date " + date);
         } catch (Exception e) {
             e.printStackTrace();
         }

         // Date ---> Timestamp
         Timestamp ts2 = new Timestamp(date.getTime());
         System.out.println("Date -> Timestamp " + ts2);

参考博客：http://yunnick.iteye.com/blog/1074495