这个函数将返回一个从java日期对象转换而来的SQL日期。

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

这个函数将返回一个从java日期对象转换而来的SQL日期。

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

别介意…

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);

  }

}

解释了它。链接是http://www.java2s.com/Tutorial/Java/0040__Data-Type/ConvertfromajavautilDateObjecttoajavasqlDateObject.htm

比较2个日期的方法。日期或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;
}

试试这个

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;
}

我是一个新手:在四处奔波之后，这是有效的。思想可能有用

     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