How to Properly Insert java.util.Date Fields into a Database?

Inserting java.util.Date Fields into a Database

Question:

I am encountering an error when attempting to insert a record with a java.util.Date field into a database. The error states that "The syntax of the string representation of a datetime value is incorrect." How can I resolve this issue?

Solution:

To insert a java.util.Date field into a database, you should first consider using an Object Relational Mapping (ORM) solution such as Hibernate to abstract SQL queries. However, if this is not feasible, you can use the following steps:

1. Utilize a java.sql.PreparedStatement to execute the SQL query.
2. Convert the java.util.Date instance to a java.sql.Date or java.sql.Timestamp object.
3. Use the setDate() method of the PreparedStatement to set the value of the date field with the converted object.

Example:

java.util.Date myDate = new java.util.Date("10/10/2009");
java.sql.Date sqlDate = new java.sql.Date(myDate.getTime());

Connection conn = ...; // Obtain the database connection

String sql = "INSERT INTO USERS (USER_ID, FIRST_NAME, LAST_NAME, SEX, DATE) VALUES (?, ?, ?, ?, ?);";
PreparedStatement stmt = conn.prepareStatement(sql);

stmt.setString(1, userId);
stmt.setString(2, myUser.GetFirstName());
stmt.setString(3, myUser.GetLastName());
stmt.setString(4, myUser.GetSex());
stmt.setDate(5, sqlDate);

stmt.executeUpdate(); // Execute the SQL query

This approach automatically escapes strings and prevents SQL injection vulnerabilities.

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