see in the link :
http://www.coderanch.com/t/304851/JDBC/java/Java-date-MySQL-date-conversion
The following code just solved the problem:
java.util.Date dt = new java.util.Date();
java.text.SimpleDateFormat sdf =
new java.text.SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String currentTime = sdf.format(dt);
This ‘currentTime‘ was inserted into the column whose type was DateTime and it was successful.