The example resolves the Java date format utility class DateUtil.java

Without further ado, look at the code:

DateUtil.java

package pers.kangxu.datautils.utils;
import java.text.SimpleDateFormat;
import java.util.Date;
import pers.kangxu.datautils.common.exception.DefineException;
/**
 * 
 * <b>
 *   Processing date    Utility class 
 * </b>
 * @author kangxu
 *
 */
public class DateUtil {
  /**
   *  String date to date format date 
   * @param str  String date 
   * @param dateFormat  String date format 
   * @return
   */
  public static Date strToDate(String strDate,String dateFormat){
    SimpleDateFormat sdf = new SimpleDateFormat(dateFormat);
    Date date = null;
    try {
      date = sdf.parse(strDate);
    } catch (Exception e) {
      throw new DefineException(" Date format conversion error ");
    }
    return date;
  }
  /**
   *  Converts a date to a string date 
   * @param date  The date of 
   * @param tarDateFormat  The date format 
   * @return
   */
  public static String dateToStr(Date date,String tarDateFormat){
    return new SimpleDateFormat(tarDateFormat).format(date);
  }
  /**
   *  Convert date format 
   * @param strDate  String date 
   * @param srcFormat  The original format 
   * @param tarFormat  Target format 
   * @return
   */
  public static String strToStr(String strDate,String srcFormat,String tarFormat){
    SimpleDateFormat sdf = new SimpleDateFormat(srcFormat);
    try {
      Date date = sdf.parse(strDate);
      sdf = new SimpleDateFormat(tarFormat);
      strDate = sdf.format(date);
    } catch (Exception e) {
      throw new DefineException(" Date format conversion error ");
    }
    return strDate;
  }
}

Test using

DateUtilTester.java

package pers.kangxu.datautils.test;
import java.util.Date;
import pers.kangxu.datautils.utils.DateUtil;
public class DateUtilTester {
  public static void main(String[] args) {
    System.out.println(DateUtil.dateToStr(new Date(), "yyyy-MM-dd HH:mm:dd"));
    System.out.println(DateUtil.strToStr("2011-1-1 1:1:1","yyyy-MM-dd HH:mm:ss", "yyyyMMddHHmmss"));
    System.out.println(DateUtil.strToDate("2011-1-1 1:1:1","yyyy-MM-dd HH:mm:ss"));
  }
}