如何将java日期类型存储到mysql日期类型？

Question

如何将java日期类型存储到mysql日期类型？

Answer 1

See that your Date is a java.sql.Timestamp (especially if you want hours,mins,sec.. to be persisted)
You could convert a java.util.Date to a Timestamp like so: new Timestamp(date.getTime())

Answer 2

使用Calendar类的一些实例将日期转换为字符串并在 SQL 查询中使用该字符串。

Answer 3

Use a PreparedStatement to execute the SQL statement, like this:

Date date = ...;

PreparedStatement ps = connection.prepareStatement("INSERT INTO mytable (this, that, datecol) values (?, ?, ?)");

ps.setString(1, "hello");
ps.setString(2, "world");
ps.setTimestamp(3, new java.sql.Timestamp(date.getTime()));

ps.executeUpdate();

When you do it like this, you let the JDBC driver convert it to the format that the database expects, so that your program can remain database independent (you don't need to deal with formatting it in the way that MySQL expects it yourself).

When querying the database, also use PreparedStatement and use the getTimestamp() method on the ResultSet to get the date as a java.sql.Timestamp object.

Answer 4

java.time

The modern approach uses java.time classes.

The DATE type in MySQL represents a date only, without time of day and without one zone.

So use LocalDate with a driver compliant with JDBC 4.2.

ZoneId z = ZoneId.of( "Africa/Tunis" ) ;
LocalDate today = LocalDate.now( z ) ;

myPreparedStatement.setObject( … , today ) ;

Retrieval.

LocalDate ld = myResultSet.getObject( … , LocalDate.class ) ;