如何使用准备语句设置当前日期和时间? [英] How to set current date and time using prepared statement?

查看:117
本文介绍了如何使用准备语句设置当前日期和时间?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我在数据库中有一列,数据类型为 DATETIME 。我想使用PreparedStatement将此列值设置为当前日期和时间。如何做?

解决方案

使用 PreparedStatement#setTimestamp() ,您传递 。 html#currentTimeMillis%28%29rel =noreferrer> 系统#currentTimeMillis()



< pre class =lang-java prettyprint-override> preparedStatement.setTimestamp(index,new Timestamp(System.currentTimeMillis()));
// ...

如果数据库支持它,您也可以调用一个DB特定的函数,用于设置当前时间戳。例如,MySQL支持 now()。例如

  String sql =INSERT INTO user(email,creationdate)VALUES(?,now )); 

如果数据库支持它,请将字段类型更改为自动设置插入/更新时间戳的字段类型,例如 TIMESTAMP ,而不是MySQL中的 DATETIME


I have a column in database having datatype DATETIME. I want to set this column value to current date and time using `PreparedStatement. How do I do that?

解决方案

Use PreparedStatement#setTimestamp() wherein you pass a java.sql.Timestamp which is constructed with System#currentTimeMillis().

preparedStatement.setTimestamp(index, new Timestamp(System.currentTimeMillis()));
// ...

Alternativaly, if the DB supports it, you could also call a DB specific function to set it with the current timestamp. For example MySQL supports now() for this. E.g.

String sql = "INSERT INTO user (email, creationdate) VALUES (?, now())";

Or if the DB supports it, change the field type to one which automatically sets the insert/update timestamp, such as TIMESTAMP instead of DATETIME in MySQL.

这篇关于如何使用准备语句设置当前日期和时间?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

查看全文
登录 关闭
扫码关注1秒登录
发送“验证码”获取 | 15天全站免登陆