Hibernate配置文件的书写

Hibernate主要配置文件

<?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>

    <!-- 配置链接那个数据库，怎么连接 -->

    <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>

    <property name="hibernate.connection.url">jdbc:mysql://127.0.0.1:3306/hibernate</property>

    <property name="hibernate.connection.username">root</property>

    <property name="hibernate.connection.password">mysql</property>

    <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>

    <!-- hibernate 其他信息 -->

    <property name="hibernate.show_sql">true</property>

    <property name="hibernate.format_sql">true</property>

    <!-- 设置我的hibernate执行的时候，是否要创建数据库对象：例如表格

    创建的方式：create：执行一次hibernate我就重新创建数据库对象。

    update：如果之前已经有这个表格了，那么把这个表格里面的结构更新成我这次要求的样子。如果之前没有这个表格，那么我就重新创建一个。 -->

    <property name="hibernate.hbm2ddl.auto">update</property>

    <!--  让session和本地线程绑定，确保我们的session对象唯一 -->

    <property name ="hibernate.current_session_context_class">thread</property>

    <!--  引入我的映射文件 -->

    <mapping resource="com/ambow/po/User.hbm.xml"/>

    </session-factory>

    </hibernate-configuration>

实体配置文件

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE hibernate-mapping PUBLIC

    "-//Hibernate/Hibernate Mapping DTD 3.0//EN"

    "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">

    <hibernate-mapping>

    <!-- 配置User实体类和表格t_user的映射关系

    name：对应的是实体对象的全名称

    table：对应的是数据库中表格的名字

     -->

     <class name="com.ambow.po.User" table="t_user">

     <!-- 配置属性和字段的映射关系 -->

     <!--  配置主键

          name：实体属性

          column：字段

     -->

     <id name="uid" column="uid">

       <!--  设置主键自增   native :根据底层数据库的种类去产生不同的主键自增方式。 -->

       <generator class="native">

       </generator>

     </id>

     <!--  配置普通列

          name：实体属性

          column：字段

      -->

      <property name="username" column="username"></property>

      <property name="sex" column="sex"></property>

      <property name="address" column="address"></property>

     </class>

    </hibernate-mapping>

log4j日志配置为文件

#

# Hibernate, Relational Persistence for Idiomatic Java

#

# License: GNU Lesser General Public License (LGPL), version 2.1 or later.

# See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.

#

### direct log messages to stdout ###

log4j.appender.stdout=org.apache.log4j.ConsoleAppender

log4j.appender.stdout.Target=System.out

log4j.appender.stdout.layout=org.apache.log4j.PatternLayout

log4j.appender.stdout.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%n

### direct messages to file hibernate.log ###

#log4j.appender.file=org.apache.log4j.FileAppender

#log4j.appender.file.File=hibernate.log

#log4j.appender.file.layout=org.apache.log4j.PatternLayout

#log4j.appender.file.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%n

### set log levels - for more verbose logging change 'info' to 'debug' ###

log4j.rootLogger=warn, stdout

#log4j.logger.org.hibernate=info

log4j.logger.org.hibernate=info

### log HQL query parser activity

#log4j.logger.org.hibernate.hql.ast.AST=debug

### log just the SQL

#log4j.logger.org.hibernate.SQL=debug

### log JDBC bind parameters ###

log4j.logger.org.hibernate.type=info

#log4j.logger.org.hibernate.type=debug

### log schema export/update ###

log4j.logger.org.hibernate.tool.hbm2ddl=debug

### log HQL parse trees

#log4j.logger.org.hibernate.hql=debug

### log cache activity ###

#log4j.logger.org.hibernate.cache=debug

### log transaction activity

#log4j.logger.org.hibernate.transaction=debug

### log JDBC resource acquisition

#log4j.logger.org.hibernate.jdbc=debug

### enable the following line if you want to track down connection ###

### leakages when using DriverManagerConnectionProvider ###

#log4j.logger.org.hibernate.connection.DriverManagerConnectionProvider=trace