How to Effectively Handle MySQL Date and Time Formats in Java?

Techniques for Handling MySQL Date and Time Formats in Java

When working with MySQL databases in Java, it is often necessary to extract and input date and time information effectively. To achieve this, consider the following strategies:

Data Representation

Java utilizes the java.util.Date object to represent dates, which essentially corresponds to the Epoch timestamp. This object captures both date and time information, typically with millisecond precision.

In MySQL, standard date and time types include DATE, TIME, and TIMESTAMP (or DATETIME in some databases). These types map to java.sql.Date, java.sql.Time, and java.sql.Timestamp in JDBC, all of which inherit from java.util.Date. The precision may vary depending on the database, but it is often measured in milliseconds like Java.

java.sql Date and Time Subclasses

Unlike java.util.Date, java.sql.Date exclusively stores date information (year, month, day), while java.sql.Time stores only time information (hours, minutes, seconds). java.sql.Timestamp combines date and time data, similar to java.util.Date.

Storing Timestamps

To store a timestamp in the database using JDBC, employ PreparedStatement#setTimestamp(). For instance:

java.util.Date date = getItSomehow();
Timestamp timestamp = new Timestamp(date.getTime());
preparedStatement = connection.prepareStatement("SELECT * FROM tbl WHERE ts > ?");
preparedStatement.setTimestamp(1, timestamp);

Retrieving Timestamps

To retrieve a timestamp from the database, use ResultSet#getTimestamp(). Example:

Timestamp timestamp = resultSet.getTimestamp("ts");
java.util.Date date = timestamp; // Upcast directly

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