Date、String、Calendar类型之间的转化

|▌冷眼眸甩不掉的悲伤 提交于 2020-03-17 23:11:28

某厂面试归来,发现自己落伍了!>>>

1.Calendar 转化 String 
 //获取当前时间的具体情况,如年,月,日,week,date,分,秒等 
        Calendar calendat = Calendar.getInstance();

SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
String dateStr = sdf.format(calendar.getTime());

 


2.String 转化Calendar

String str="2010-5-27";
SimpleDateFormat sdf= new SimpleDateFormat("yyyy-MM-dd");

Date date =sdf.parse(str);

Calendar calendar = Calendar.getInstance();

calendar.setTime(date);

 

 

3.Date 转化String

SimpleDateFormat sdf= new SimpleDateFormat("yyyy-MM-dd");

String dateStr=sdf.format(new Date());

 

 

 

4.String 转化Date 
String str="2010-5-27";

SimpleDateFormat sdf= new SimpleDateFormat("yyyy-MM-dd");

Date birthday = sdf.parse(str);

 

 

5.Date 转化Calendar

Calendar calendar = Calendar.getInstance();
calendar.setTime(new java.util.Date());

 

6.Calendar转化Date

Calendar calendar = Calendar.getInstance();
java.util.Date date =calendar.getTime();

 

下面有个例子,插入oralce表类型为DATE的数据

 

SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd HHmmss");
    String date = sdf.format(new Date()); 

    -----------------------------------------

     String sql = "Insert into SM_SEND (*****************) " +
                  "values (*******************************

                   "',1," + "to_date('" +date+ "','YYYY-MM-DD HH24:MI:SS')" +
                   "," + "to_date('" +date+ "','YYYY-MM-DD HH24:MI:SS')" +
                   ",0,null,null,null,null,null,null,null)";

易学教程内所有资源均来自网络或用户发布的内容,如有违反法律规定的内容欢迎反馈
该文章没有解决你所遇到的问题?点击提问,说说你的问题,让更多的人一起探讨吧!