把這個Students.hbm.xml 配置文件放到src目錄下，不要放到那個default包下?。?！

<mapping resource="Students.hbm.xml" />

<?xml?version="1.0"?encoding="UTF-8"?>
<!DOCTYPE?hibernate-configuration?PUBLIC
		"-//Hibernate/Hibernate?Configuration?DTD?3.0//EN"
		"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
????<session-factory>
????????<property?name="hibernate.connection.driver_class">com.mysql.jdbc.Driver?</property>?
????????<property?name="hibernate.connection.username">root?</property>?
????????<property?name="hibernate.connection.password">root?</property>???
????????<property?name="hibernate.connection.url">jdbc:mysql://localhost:3306/imocc?useUnicode=true&characterEncoding=utf-8</property>
????????<property?name="hibernate.dialect">org.hibernate.dialect.MySQLDialect?</property>?
????????
????????<property?name="hibernate.show_sql">true?</property>
????????<property?name="hibernate.format_sql">true?</property>
????????<property?name="hibernate.hbm2ddl.auto">create?</property>
????????
????????<mapping/?resource="Students.hbm.xml">
????????
????</session-factory>
</hibernate-configuration>