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<beans>
<bean id="u" class="com.sina.dao.impl.UserDAOImpl" />
</beans>
userdaoimpl
package com.sina.dao.impl;
import com.sina.dao.UserDAO;
import com.sina.model.User;
public class UserDAOImpl implements UserDAO{
@Override
public void save(User u) {
System.out.println("a user saved!");
}
}