Java时间类型转换

 String转Long

Long long=new SimpleDateFormat("yyyyMMddHHmmss").parse(String).getTime();

  

Long转String 

String string = new SimpleDateFormat("yyyyMMddHHmmss").format(new Date(Long));

 

 String转Timestamp

Timestamp.valueOf(String)

 

Timestamp转String

Timestamp ts = new Timestamp(System.currentTimeMillis());
String string=new SimpleDateFormat("yyyy/MM/dd HH:mm:ss").format(ts);  

  

String转Date

Date date=new SimpleDateFormat("yyyyMMddHHmmss").parse(String)

 

Date转String

String string=new SimpleDateFormat("yyyyMMddHHmmss").format(date)

  

Date转Long

Long long=date.getTime();

 

Long转Date

String string=new SimpleDateFormat("yyyyMMddHHmmss").format(new Date(Long));
Date date=new SimpleDateFormat("yyyyMMddHHmmss").parse(string);

 

Date转Timestamp

Timestamp ts = new Timestamp(date.getTime());

  

Timestamp转Date

Timestamp ts = new Timestamp(System.currentTimeMillis()); 
Date date=new Date();
date=ts;

  

Long转Timestamp

Long time1=System.currentTimeMillis();
Timestamp time=new Timestamp(time1);

  

Timestamp转Long

long now=t.getDateTime();

  

 注意:如果数据库是dateTime类型的,即使java代码中声明的是Timestamp,但还是用.getTime()方法来获取这个Long类型的时间。

    MySql的时间类型有             Java中与之对应的时间类型
                 date                                              java.sql.Date
             Datetime                                       java.sql.Timestamp
            Timestamp                                     java.sql.Timestamp
            Time                                             java.sql.Time
            Year                                              java.sql.Date

所以,如果数据库是dateTime,则先用java转换成timestamp类型

 Date date = new Date();//获得系统时间.
         String nowTime = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(date);//将时间格式转换成符合Timestamp要求的格式.
         Timestamp xx = Timestamp.valueOf(nowTime);

然后存入数据库

posted @ 2015-09-29 20:13  Lost blog  阅读(1535)  评论(0编辑  收藏  举报