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

您可以使用此方法将util日期转换为sql日期，

DateUtilities.convertUtilDateToSql(java.util.Date)

对于另一个答案，你可能会遇到时间信息的问题(比较日期和意想不到的结果!)

我建议:

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);

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

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;
}

我认为最好的转变方式是:

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

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

如果你想在SQL表中插入dt变量，你可以这样做:

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