如何在数据库的类型日期列中插入值？

Question

How to save the value of a variable that is as a date to the database.

My String is as following

Java

 SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
    try {
        SimpleDateFormat parseFormatter = new SimpleDateFormat("yyyy-MM-dd");
        //SimpleDateFormat dt = new SimpleDateFormat("yyyyy-mm-dd hh:mm:ss+hh:mm"); 
        Date date = parseFormatter.parse(mydate);

        String formattedDate = formatter.format(date);
        System.out.println("Date"+formattedDate);
      return formattedDate;  <<need to save its value to database lets say its value is 2013-03-19

I need to save it into a column of table that its type is date.

Database

Name Type
Date date

I suppose I need to convert the string to date but how?

ps.setDate(????)

Answer 1

if mydate is a string in yyyy-MM-dd format then you can do the following

    PreparedStatement ps = conn.prepareStatement("insert into t1 (date) values (?)");
    ps.setDate(1, java.sql.Date.valueOf(mydate));
    ps.executeUpdate();

Answer 2

Use the STR_TO_DATE function in MySql

EDIT

eg

INSERT INTO table (dateCol1, col2 ..)
VALUES (STR_TO_DATE('May 1, 2013','%M %d,%Y'), col2value, ...)

Answer 3

MySQL understands dates. Assuming you are using a PreparedStatement you can just use standard JDBC stmt.setDate(n,date) where n is the parameter index and date is a Java variable of type date.

No need to do any string conversions.

Answer 4

I suppose I need to convert the string to date but how?

If you want to convert String into Date , suppose your String is 2013-03-19

String yourString = "2013-03-19";
Date date = new SimpleDateFormat("yyyy-MM-dd").parse(yourString);

Here your String is converted into the Date object, but if you need to set this particular date into another date object then this is not possible in this way yourDateObj.setDate(date) because there is no any such direct method in Date class which will take date as an argument.

to set a particular date you can use Calendar like

Calendar yourDate = new GregorianCalendar();
yourDate.setTime(date);

Other wise you can do this way also with Date(int year, int month, int date) but it is deprecated now.

Or If you wish to insert String into Date column of mysql then #function_str-to-date , I agree with Ed Heal answer