[英]SWT widgets datetime inserting to mariadb
I need help. 我需要帮助。 I want to store a datetime value on my database but it says that the method timestamp is not applicable to the datetime argument , possibly referring to the preparedstatement code ".setTimestamp". 我想在数据库中存储一个datetime值,但是它说方法timestamp不适用于datetime参数 ,可能引用了preparestatement代码“ .setTimestamp”。 I use the SWT Datetime widget to get the start date but I can't seem to put it into the prepared statement. 我使用SWT Datetime小部件获取开始日期,但似乎无法将其放入准备好的语句中。 The datetime values from the SWT widget is passed on the parameter given. 来自SWT小部件的datetime值传递给给定的参数。
Here's the code below: 这是下面的代码:
public void addLeave(String leaveType, DateTime start, DateTime end, int halfDay){
try{
Connection con = getConnection();
String sql = "INSERT into leaves(user_id, leaves_type, leaves_halfDay,leaves_startDate, leaves_endDate) VALUES(?,?,?,?,?)";
PreparedStatement addLeave = con.prepareStatement(sql);
addLeave.setString(1, Pkey);
addLeave.setString(2, leaveType);
addLeave.setInt(3, halfDay);
addLeave.setTimestamp(4, start);
addLeave.setTimestamp(5, end);
addLeave.execute();
}catch(Exception e){
e.printStackTrace();
}
}
You'll have to convert the DateTime
to Timestamp
yourself: 您必须自己将DateTime
转换为Timestamp
:
private Timestamp getTimestamp(DateTime dt)
{
Calendar cal = Calendar.getInstance();
cal.set(Calendar.YEAR, dt.getYear());
cal.set(Calendar.MONTH, dt.getMonth());
cal.set(Calendar.DAY_OF_MONTH, dt.getDay());
cal.set(Calendar.HOUR_OF_DAY, dt.getHours());
cal.set(Calendar.MINUTE, dt.getMinutes());
cal.set(Calendar.SECOND, dt.getSeconds());
return new Timestamp(cal.getTimeInMillis());
}
Then call it like this: 然后这样称呼它:
addLeave.setTimestamp(4, getTimestamp(start));
Let MySQL do the conversion as you INSERT
: 让MySQL在您INSERT
进行转换:
CREATE TABLE `ts_dt_n` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`t2` timestamp(6) NOT NULL DEFAULT CURRENT_TIMESTAMP(6) ON UPDATE CURRENT_TIMESTAMP(6),
`t3` datetime(1) DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=6 DEFAULT CHARSET=latin1
INSERT into ts_dt_n (t2, t3) values (FROM_UNIXTIME(1477155329.123),
FROM_UNIXTIME(1477155329.123));
SELECT t2, t3 FROM ts_dt_n WHERE id = 5\G
*************************** 1. row ***************************
t2: 2016-10-22 09:55:29.123000
t3: 2016-10-22 09:55:29.1
If you are coming from Java's millisecond timer, divide by 1000 as you convert and insert: 如果您来自Java的毫秒计时器,请在转换并插入时除以1000:
INSERT INTO ts_dt_n (t2, t3) values (FROM_UNIXTIME(1477155829739/1000),
FROM_UNIXTIME(1477155829739/1000));
SELECT t2, t3 FROM ts_dt_n WHERE id = 6\G
*************************** 1. row ***************************
t2: 2016-10-22 10:03:49.739000
t3: 2016-10-22 10:03:49.7
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