重拾Hibernate(1)之环境配置 (三)

Caused by: org.xml.sax.SAXParseException: The content of element type "property" must match "(meta*,(column|formula)*,type )".
at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(ErrorHandlerWrapper.java:236)
此错误是hibernate-cfg.xml配置文件错误(刚开始我是从文档中copy的，而那个是mapping实体类的映射文件)

[html]
< xml version="1.0" >
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">



org.hibernate.dialect.OracleDialect
jdbc:oracle:thin:@172.16.1.4:1521:orcl
username
123
oracle.jdbc.driver.OracleDriver
thred
true
true
true

< xml version="1.0" >
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

org.hibernate.dialect.OracleDialect
jdbc:oracle:thin:@172.16.1.4:1521:orcl
username
123
oracle.jdbc.driver.OracleDriver
thred
true
true
true

[html]
Exception in thread "main" org.hibernate.HibernateException: JDBC Driver class not found: oracle.jdbc.driver.OracleDriver

Exception in thread "main" org.hibernate.HibernateException: JDBC Driver class not found: oracle.jdbc.driver.OracleDriver
没有引入oracle驱动

[html]
Exception in thread "main" org.hibernate.MappingException: Unknown entity: com.itmyhome.Teacher

Exception in thread "main" org.hibernate.MappingException: Unknown entity: com.itmyhome.Teacher没有在hibernate.cfg.xml中加入映射

[html]

然后运行：

[html]
Exception in thread "main" org.hibernate.AnnotationException: No identifier specified for entity: com.itmyhome.Teacher

Exception in thread "main" org.hibernate.AnnotationException: No identifier specified for entity: com.itmyhome.Teacher
在BizEntity类上面加上@MappedSuperclass注解 用在实体的继承过程中的父类上。

如果直接再次运行的话 会报错 表或视图不存在

而应用SchemaExport先生成表

hibernate生成的表语句为：

[sql]
drop table T_STUDENT cascade constraints

drop table T_TEACHER cascade constraints

create table T_STUDENT (
id varchar2(255) not null,
name varchar2(255),
score varchar2(255),
primary key (id)
)

create table T_TEACHER (
id varchar2(255) not null,
name varchar2(255),
title varchar2(255),
primary key (id)
)

drop table T_STUDENT cascade constraints

drop table T_TEACHER cascade constraints

create table T_STUDENT (
id varchar2(255) not null,
name varchar2(255),
score varchar2(255),
primary key (id)
)

create table T_TEACHER (
id varchar2(255) not null,
name varchar2(255),
title varchar2(255),
primary key (id)
)
此时再插入一条teacher数据：

[sql]
Hibernate:
insert
into
T_TEACHER
(name, title, id)
values
( , , )

Hibernate:
insert
into
T_TEACHER
(name, title, id)
values
( , , )最终所需jar包

结束