java字符串与日期类型转换的工具类

常用的字符串转date，和日期转字符串的方法，具体内容如下

package com.cq2022.zago.base.util; 
 
import java.text.DateFormat; 
import java.text.ParseException; 
import java.text.SimpleDateFormat; 
import java.util.Date; 
import java.util.GregorianCalendar; 
 
import javax.xml.datatype.DatatypeFactory; 
import javax.xml.datatype.XMLGregorianCalendar; 
 
import org.slf4j.Logger; 
import org.slf4j.LoggerFactory; 
 
 
public class DateUtils { 
 
 private static final Logger logger = LoggerFactory.getLogger(DateUtils.class); 
  
  
 public static XMLGregorianCalendar convertToXMLGregorianCalendar(Date date) { 
  GregorianCalendar cal = new GregorianCalendar(); 
  cal.setTime(date); 
  XMLGregorianCalendar gc = null; 
  try { 
   gc = DatatypeFactory.newInstance().newXMLGregorianCalendar(cal); 
  } 
  catch (Exception e) { 
   logger.error("Date类型转换成XMLGregorianCalendar类型出错："+e); 
  } 
  return gc; 
 } 
 
  
 public static Date convertToDate(XMLGregorianCalendar cal) throws Exception { 
  GregorianCalendar ca = cal.toGregorianCalendar(); 
  return ca.getTime(); 
 } 
 
  
 public static Date stringToDate(String str, String format) { 
  DateFormat dateFormat = new SimpleDateFormat(format); 
  Date date = null; 
  try { 
   date = dateFormat.parse(str); 
  } 
  catch (ParseException e) { 
   logger.error("String类型 转 Date类型出错："+e); 
  } 
  return date; 
 } 
  
  
 public static String dateToString(Date date,String format){ 
  DateFormat dateFormat = new SimpleDateFormat(format); 
  String strDate=null; 
  try { 
   if(date!=null){ 
    strDate=dateFormat.format(date); 
   } 
  } catch (Exception e) { 
   // TODO Auto-generated catch block 
   logger.error("Date类型 转 String类型出错："+e); 
  } 
  return strDate; 
 } 
  
 
  
 public static void main(String[] args) { 
  XMLGregorianCalendar d = DateUtils 
    .convertToXMLGregorianCalendar(new Date()); 
//  System.out.println(d.getDay()); 
  XMLGregorianCalendar cal = null; 
  try { 
   cal = DatatypeFactory.newInstance().newXMLGregorianCalendar(); 
   cal.setMonth(06); 
   cal.setYear(2010); 
   Date date = DateUtils.convertToDate(cal); 
   String format = "yyyy-MM-dd HH:mm:ss"; 
   SimpleDateFormat formatter = new SimpleDateFormat(format); 
//   System.out.println(formatter.format(date)); 
    
   Date d1 = DateUtils.stringToDate("2014/7/24 9:51:00", "yyyy/MM/dd hh:mm:ss"); 
   XMLGregorianCalendar d2 = DateUtils.convertToXMLGregorianCalendar(d1); 
//   System.out.println(d2.toString()); 
    
   String dateStr=DateUtils.dateToString(cal.toGregorianCalendar().getTime(), "yyyy-MM-dd HH:mm:ss"); 
//   System.out.println("dateStr="+ dateStr); 
  } 
  catch (Exception e) { 
   e.printStackTrace(); 
  } 
 } 
}

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