MYSQL JDBC 数据类型_MySQL
Reference: 《JDBC setObject非主流性能报告》[1]
MySQL与JAVA里面的时间类型对应
MYSQL时间类型 | JAVA对应的时间类型 |
date | java.sql.Date |
Year | ava.sql.Date |
Datetime | java.sql.Timestamp |
Timestamp | java.sql.Timestamp |
Time | java.sql.Time |
附上一段代码
<pre style="font-size: 12px; margin: 0em; width: 100%; font-family: consolas,'Courier New',courier,monospace; background-color: #fbfbfb">Calendar cal=Calendar.getInstance();
Timestamp now=new Timestamp(cal.getTime().getTime());
然后用JDBC插入的时候要用prepareStatement.setTimestamp()
再说说prepareStatement,有一堆setInt,setString,setDate什么的。其实还有一个非常强大的stObject(),能自动转换匹配类型,而且性能不差,这就延伸出了好多种用法了吧,其实我最初仅仅是为了用来向preparedStatement中插入null的 –_-! 另外如果把preparedStatement中的占位符留空,将会写成** NOT SPECIFIED **,不知道会不会自动弄成null呢

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