String,Timestamp,Date(java.util.date,java,sql.date)相互转化

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1. String Date 相互转化

String->java.util.Date

public void StrToDate() throws ParseException{String str = "2014-11-23 02:50:12";Date date = new Date();SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");date = sdf.parse(str);System.out.println(date);}

java.util.Date->String

public void dateToStr(){Date date = new Date();SimpleDateFormat sdf = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");SimpleDateFormat sdf2 = new SimpleDateFormat("yyyy/MM/dd HH/mm/ss");String str = sdf.format(date);System.out.println(str);str = sdf2.format(date);System.out.println(str);}

2.String Timestamp 相互转化

String->Timestamp

public void stringToTimestamp(){Timestamp ts = new Timestamp(System.currentTimeMillis());//String的类型必须形如： yyyy-mm-dd hh:mm:ss[.f...] 这样的格式，中括号表示可选，否则报错！String str = "2014-11-23 02:59:11";ts = Timestamp.valueOf(str);System.out.println(ts);}

Timestamp->String

public void timestampToString(){String str = "";Timestamp ts = new Timestamp(System.currentTimeMillis());SimpleDateFormat sdf = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");//方法一str = sdf.format(ts);System.out.println(str);//方法二str = ts.toString();System.out.println(str);}

3. Timestammp Date之间想到转化

Timestamp->java.util.Date

public void timestampToDate(){Timestamp ts = new Timestamp(System.currentTimeMillis());Date date = new Date();date = ts;System.out.println(date);}

java.util.Date->Timestamp

public void dateToTimestamp(){Timestamp ts = new Timestamp(new Date().getTime());System.out.println(new Date());System.out.println(ts);}

4.java.util.Date(包含年月日时分秒) 与java.sql.Date(只包含年月日)

java.util.Date(包含年月日时分秒) 与java.sql.Date(只包含年月日)

public void UtilDateToSqlDate(){java.util.Date dateU = new java.util.Date();java.sql.Date dateS = new java.sql.Date(dateU.getTime());System.out.println(dateS);}

public void SqlDateToUtilDate(){java.sql.Date dateS = new java.sql.Date(2014, 11, 23);java.util.Date dateU = new java.util.Date(dateS.getTime());System.out.println(dateU);}

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