日期转换

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import java.sql.Timestamp;  import java.text.DateFormat;  import java.text.ParseException;  import java.text.SimpleDateFormat;  import java.util.Date;  import org.apache.commons.logging.Log;  import org.apache.commons.logging.LogFactory;  /**  * @author zxw  *  */  public class DateUtil {      private static final Log log = LogFactory.getLog(DateUtil.class);      /**      * 将时间字符串转换为Date类型      * @param dateStr      * @return Date      */      public static Date toDate(String dateStr) {          Date date = null;          SimpleDateFormat formater = new SimpleDateFormat();          formater.applyPattern("yyyy-MM-dd");          try {              date = formater.parse(dateStr);          } catch (ParseException e) {              e.printStackTrace();          }          return date;      }      /**      * 按照提供的格式将字符串转换成Date类型      * @param dateStr      * @param formaterString      * @return      */      public static Date toDate(String dateStr, String formaterString) {          Date date = null;          SimpleDateFormat formater = new SimpleDateFormat();          formater.applyPattern(formaterString);          try {              date = formater.parse(dateStr);          } catch (ParseException e) {              e.printStackTrace();          }          return date;      }      /**      * 将Date类型时间转换为字符串      * @param date      * @return      */      public static String toString(Date date) {          String time;          SimpleDateFormat formater = new SimpleDateFormat();          formater.applyPattern("yyyy-MM-dd");          time = formater.format(date);          return time;      }      /**      * 按照参数提供的格式将Date类型时间转换为字符串      * @param date      * @param formaterString      * @return      */      public static String toString(Date date, String formaterString) {          String time;          SimpleDateFormat formater = new SimpleDateFormat();          formater.applyPattern(formaterString);          time = formater.format(date);          return time;      }      /**      * method 将字符串类型的日期转换为一个timestamp（时间戳记java.sql.Timestamp）      * @param dateString      *            需要转换为timestamp的字符串      * @return dataTime timestamp      */      public final static java.sql.Timestamp string2Time(String dateString)              throws java.text.ParseException {          DateFormat dateFormat;  //      dateFormat = new SimpleDateFormat("yyyy-MM-dd kk:mm:ss.SSS",  //              Locale.ENGLISH);// 设定格式           dateFormat = new SimpleDateFormat("yyyy-MM-dd kk:mm");          dateFormat.setLenient(false);          java.util.Date timeDate = dateFormat.parse(dateString);// util类型          java.sql.Timestamp dateTime = new java.sql.Timestamp(timeDate.getTime());// Timestamp类型,timeDate.getTime()返回一个long型          return dateTime;      }      /**      * 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）      *       * @param dateString 需要转换为timestamp的字符串      * @param formaterString dateString字符串的解析格式      * @return      * @throws java.text.ParseException      */      public final static java.sql.Timestamp string2Time(String dateString,              String formaterString) throws java.text.ParseException {          DateFormat dateFormat;          dateFormat = new SimpleDateFormat(formaterString);// 设定格式          // dateFormat = new SimpleDateFormat("yyyy-MM-dd kk:mm:ss");          dateFormat.setLenient(false);          java.util.Date timeDate = dateFormat.parse(dateString);// util类型          java.sql.Timestamp dateTime = new java.sql.Timestamp(timeDate.getTime());// Timestamp类型,timeDate.getTime()返回一个long型          return dateTime;      }      public static void main(String[] args) throws ParseException {          String t = DateUtil.toString(new Date());          System.out.println(t);          Date date = DateUtil.toDate("2010-06-17");          System.out.println(date);  //      String sToTimestamp = "2005-8-18 14:21:12.123";// 用于转换成java.sql.Timestamp的字符串          String sToTimestamp = "2005-8-18 14:21";// 用于转换成java.sql.Timestamp的字符串          Timestamp Timestamp = string2Time(sToTimestamp);          System.out.println(Timestamp);      }  }
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