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();   }  } }