hibernate工程 基础错误

1.错误：
Error parsing XML: /hibernate.cfg.xml(6) Element type "hibernate-configuration" must be declared.

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<!--hibernate-mapping是映射文件的根元素-->
<hibernate-configuration>
	<session-factory>
		<!-- 指定连接数据库所用的驱动 -->
		<property name="connection.driver_class">oracle.jdbc.driver.OracleDriver</property>
	
		<property name="connection.url">jdbc:oracle:thin:@10.166.146.60:1521:ecpBMS</property>
	
		<property name="connection.username">ECPADMIN</property>
		<property name="connection.password">ECPADMIN</property>
	
		<!-- 指定连接池的大小 -->
		<property name="hibernate.c3p0.max_size">20</property>
		<property name="hibernate.c3p0.min_size">1</property>
		<property name="hibernate.c3p0.timeout">500000</property>
		<property name="hibernate.c3p0.max_statements">100</property>
		<property name="hibernate.c3p0.idle_test_period">4000</property>
		<property name="hibernate.c3p0.acquire_increment">2</property>
	
		<property name="dialect">org.hibernate.dialect.Oracle9Dialect</property>
		<property name="hbm2ddl.auto">create</property>
		<property name="myeclipse.connection.profile"></property>
		<mapping resource="com.model.News.hbm.xml" />
	
	</session-factory>
</hibernate-configuration>

DTD文件有问题

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

2. org.hibernate.MappingNotFoundException

<mapping resource="com.model.News.hbm.xml" />

<mapping resource="com/model/News.hbm.xml" />

3.java.lang.NoClassDefFoundError: org/apache/commons/collections/SequencedHashMap
添加commons-collections-3.2.jar
4.Could not parse mapping document from resource com/model/News.hbm.xml

<hibernate-mapping>
	<class name="com.model.News" table="news_table">
		<id name="id" unsaved-value="null">
			<generator class="identity"/>
		</id>
		
		<property name="title"/>
		<property name="context"/>
	</class>
</hibernate-mapping>

新增type

<class name="com.model.News" table="news_table">
		<id name="id" unsaved-value="null" type="java.lang.Long">
			<column name="ID" precision="22" scale="0" />
			<generator class="identity"/>
		</id>
		
		<property name="title" type="java.lang.String">
			<column name="title" not-null="true" />
		</property>
		<property name="context" type="java.lang.String">
			<column name="context" not-null="true" />
		</property>
	</class>

5.java.lang.ClassNotFoundException: oracle.jdbc.driver.OracleDriver
导入：ojdbc14.jar
6.java.lang.ClassNotFoundException: com.mchange.v2.c3p0.DataSources
c3p0-0.9.1.2.jar
7.Could not find a getter for context in class com.model.News
*.hmb.xml中的属性名和pojo中的属性不一致.注意:属性名是否多了空格.
启示：.hbm.xml里的排列最好跟数据库表里的排列一样！最好不要乱改变位置！否则会出莫名其妙的错误！
8.java.lang.NoClassDefFoundError: net/sf/cglib/proxy/CallbackFilter
包cglib-2.1.3.jar
9.java.lang.NoClassDefFoundError: org/objectweb/asm/Type
asm-2.2.3.jar
10.java.lang.NoClassDefFoundError: org/objectweb/asm/CodeVisitor
cglib-2.1.3.jar
换成
cglib-nodep-2.1_3.jar
11.Dialect does not support identity key generation

<id name="id" unsaved-value="null" type="java.lang.Long">
			<column name="ID" precision="22" scale="0" />
			<generator class="identity "/>
		</id>

<generator class="identity "/>
改成
<generator class="assigned"/>
id手动插入