如何使用Java或JSP在SQL的时间戳数据类型列中插入值

Question

I have tried to add value using preparedStatement.
----Some piece of Code---- `

String query = "INSERT INTO COMMENTS VALUES(?,?,?)";
            PreparedStatement ps = con.prepareStatement(query);
            ps.setString(1, email);
            ps.setString(2, name);
            ps.setTimestamp(3, now);       

3rd column is timestamp type. But this is showing error. It shows a whole list of packages needed to be imported. But when i import a package, it asks me to create a variable named 'now'. Help me, how to fill timestamp field in database using java or JSP. Thanks in advance

Answer 1

'now' needs to be of type java.sql.Timestamp

you can run a quick test by doing

ps.setTimestamp(3,getCurrentTimeStamp());

where getCurrentTimeStamp() is

public java.sql.Timestamp getCurrentTimeStamp() {
        java.util.Date today = new java.util.Date();
        return new java.sql.Timestamp(today.getTime());
    }

Answer 2

为了进一步缩短HocusPocus正确答案，也许

ps.setTimestamp(3, new java.sql.Timestamp(java.lang.System.currentTimeMillis()));