1、SimpleDateFormat.format 把日期类型转化到指定格式字符串

public static String convToString(Calendar cld,String template){        String resultString=null;        try {            Date date=cld.getTime();            SimpleDateFormat sdf=new SimpleDateFormat(template,Locale.getDefault());            resultString=sdf.format(date);        } catch (Exception e) {            // TODO Auto-generated catch block            e.printStackTrace();        }        return resultString;    }

 

 

2、SimpleDateFormat.parse 把指定格式字符串转日期类型

public static Calendar convToCalender(String str,String template){        SimpleDateFormat sdf;        Date date;        Calendar cltResult = Calendar.getInstance();        sdf = new SimpleDateFormat(template, Locale.getDefault());        try {            date = sdf.parse(str);            cltResult.setTime(date);        } catch (Exception ex) {            // TODO Auto-generated catch block            ex.printStackTrace();        }        return cltResult;    }