Summary on 20080626: hibernate configuration and hbm2ddl tool

最新推荐文章于 2025-09-09 13:58:12 发布

crazy_coder

最新推荐文章于 2025-09-09 13:58:12 发布

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分类专栏： Work Summary 文章标签： hibernate database class sql schema file

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本文介绍了Hibernate配置文件的正确格式及映射文件的路径设置方式，并详细解释了如何使用SchemaExport类来根据Hibernate配置生成数据库表结构。

xml file is actualy like the following format:

<!DOCTYPE hibernate-mapping

PUBLIC "-//hibernate/hibernate mapping dtd 3.0//EN"

"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

in the hibernate configuration file hibernate.cfg.xml, when writing the mapping files the format should be: <mapping resource="home/stronger/hibernate/**.hbm.xml"/> see, the path is actually seperated by '/', it's not the format of class path

hbm2ddl tool： in org.hibernate.tool.hbm2ddl package, there is class: SchemaExport, this class get the hibernate configuration and use the method create to create sql script and create the table in database, according to the mapping resource set. Ex:

Configuration config = new Configuration().configure();

SchemaExport schema = new SchemaExport(config);

schema.create(true,true);



//schema.create(boolean sqlScript, boolean exportScript)

//sqlScript: create sql script and show it in the console

//export script: export the sql script to database and execute