[java] How to convert java.util.Date to java.sql.Date?

I am trying to use a java.util.Date as input and then creating a query with it - so I need a java.sql.Date.

I was surprised to find that it couldn't do the conversion implicitly or explicitly - but I don't even know how I would do this, as the Java API is still fairly new to me.

Format your java.util.Date first. Then use the formatted date to get the date in java.sql.Date

java.util.Date utilDate = "Your date"
SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
final String stringDate= dateFormat.format(utilDate);
final java.sql.Date sqlDate=  java.sql.Date.valueOf(stringDate);

Converting java.util.Data to java.sql.Data will loose hour, minute and second. So if it is possible, I suggest you use java.sql.Timestamp like this:

prepareStatement.setTimestamp(1, new Timestamp(utilDate.getTime()));

For more info, you can check this question.

java.sql.Date sqlDate = new java.sql.Date(javaDate.getTime());

Here javaDate is the instance of java.util.Date

I was trying the following coding that worked fine.

java.util.Date utilDate = new java.util.Date();
java.sql.Date sqlDate = new java.sql.Date(utilDate);

Method for comparing 2 dates (util.date or sql.date)

 public static boolean isSameDay(Date a, Date b) {
    Calendar calA = new GregorianCalendar();
    calA.setTime(a);

    Calendar calB = new GregorianCalendar();
    calB.setTime(b);

    final int yearA = calA.get(Calendar.YEAR);
    final int monthA = calA.get(Calendar.MONTH);
    final int dayA = calA.get(Calendar.DAY_OF_YEAR);

    final int yearB = calB.get(Calendar.YEAR);
    final int monthB = calB.get(Calendar.MONTH);
    final int dayB = calB.get(Calendar.DAY_OF_YEAR);

    return yearA == yearB && monthA == monthB && dayA == dayB;
}

Nevermind....

public class MainClass {

  public static void main(String[] args) {
    java.util.Date utilDate = new java.util.Date();
    java.sql.Date sqlDate = new java.sql.Date(utilDate.getTime());
    System.out.println("utilDate:" + utilDate);
    System.out.println("sqlDate:" + sqlDate);

  }

}

explains it. The link is http://www.java2s.com/Tutorial/Java/0040__Data-Type/ConvertfromajavautilDateObjecttoajavasqlDateObject.htm

I think the best way to convert is:

static java.sql.Timestamp SQLDateTime(Long utilDate) {
    return new java.sql.Timestamp(utilDate);
}

Date date = new Date();
java.sql.Timestamp dt = SQLDateTime(date.getTime());

If you want to insert the dt variable into an SQL table you can do:

insert into table (expireAt) values ('"+dt+"');

You can use this method to convert util date to sql date,

DateUtilities.convertUtilDateToSql(java.util.Date)

If you are usgin Mysql a date column can be passed a String representation of this date

so i using the DateFormatter Class to format it and then set it as a String in the sql statement or prepared statement

here is the code illustration:

private String converUtilDateToSqlDate(java.util.Date utilDate) {
    SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
    String sqlDate = sdf.format(utilDate);
    return sqlDate;
}

String date = converUtilDateToSqlDate(otherTransaction.getTransDate());

//then pass this date in you sql statement

In my case of picking date from JXDatePicker (java calender) and getting it stored in database as SQL Date type, below works fine ..

java.sql.Date date = new java.sql.Date(pickedDate.getDate().getTime());

where pickedDate is object of JXDatePicker

This function will return a converted SQL date from java date object.

public java.sql.Date convertJavaDateToSqlDate(java.util.Date date) {
    return new java.sql.Date(date.getTime());
}

I am a novice: after much running around this worked. Thought might be useful

     String bufDt =  bDOB.getText();  //data from form
     DateFormat dF = new SimpleDateFormat("dd-MM-yyyy"); //data in form is in this format
     Date bbdt = (Date)dF.parse(bufDt);  // string data is converted into java util date
     DateFormat dsF = new SimpleDateFormat("yyyy-MM-dd"); //converted date is reformatted for conversion to sql.date
     String ndt = dsF.format(bbdt); // java util date is converted to compatible java sql date
     java.sql.Date sqlDate=  java.sql.Date.valueOf(ndt);  // finally data from the form is convered to java sql. date for placing in database

i am using the following code please try it out

DateFormat fm= new SimpleDateFormatter();

specify the format of the date you want for example "DD-MM_YYYY" or 'YYYY-mm-dd' then use the java Date datatype as

fm.format("object of java.util.date");

then it will parse your date

try with this

public static String toMysqlDateStr(Date date) {
    String dateForMySql = "";
    if (date == null) {
        dateForMySql = null;
    } else {
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        dateForMySql = sdf.format(date);
    }

    return dateForMySql;
}

This function will return a converted SQL date from java date object.

public static java.sql.Date convertFromJAVADateToSQLDate(
            java.util.Date javaDate) {
        java.sql.Date sqlDate = null;
        if (javaDate != null) {
            sqlDate = new Date(javaDate.getTime());
        }
        return sqlDate;
    }

With the other answer you may have troubles with the time info (compare the dates with unexpected results!)

I suggest:

java.util.Calendar cal = Calendar.getInstance();
java.util.Date utilDate = new java.util.Date(); // your util date
cal.setTime(utilDate);
cal.set(Calendar.HOUR_OF_DAY, 0);
cal.set(Calendar.MINUTE, 0);
cal.set(Calendar.SECOND, 0);
cal.set(Calendar.MILLISECOND, 0);    
java.sql.Date sqlDate = new java.sql.Date(cal.getTime().getTime()); // your sql date
System.out.println("utilDate:" + utilDate);
System.out.println("sqlDate:" + sqlDate);

Here the example of converting Util Date to Sql date and ya this is one example what i am using in my project might be helpful to you too.

java.util.Date utilStartDate = table_Login.getDob();(orwhat ever date your give form obj)
java.sql.Date sqlStartDate = new java.sql.Date(utilStartDate.getTime());(converting date)