EJB3(中文版) 第七集 Secondary Tables

EJB规范允许映射一个实体到多个表，你可以通过使用@SecondaryTable批注. Customer组件映射它的地址属性到一个分开的ADDRESS表.首先定义第二个表. @Entity @Table(name = "CUSTOMER") @SecondaryTable(name = "EMBEDDED_ADDRESS", join = {@JoinColumn(name = "ADDRESS_ID")}) public class Customer implements java.io.Serializable {} 第二个表的@JoinColumn注释name属性必需与Customer的主键匹配. @Column. @Column(name = "STREET", secondaryTable = "EMBEDDED_ADDRESS") public String getStreet() { return street; } 注意：在JBoss内置数据库中不会出现这样的警告 MySQL中会出现 18:55:15,125 INFO [SessionFactoryObjectFactory] Not binding factory to JNDI, no JNDI name configured 18:55:15,140 INFO [SchemaExport] Running hbm2ddl schema export 18:55:15,140 INFO [SchemaExport] exporting generated schema to database 18:55:15,171 WARN [JDBCExceptionReporter] SQL Warning: 1051, SQLState: 42S02 18:55:15,187 WARN [JDBCExceptionReporter] Unknown table 'customer' 18:55:15,187 WARN [JDBCExceptionReporter] SQL Warning: 1051, SQLState: 42S02 18:55:15,187 WARN [JDBCExceptionReporter] Unknown table 'customer' 18:55:15,187 WARN [JDBCExceptionReporter] SQL Warning: 1051, SQLState: 42S02 18:55:15,187 WARN [JDBCExceptionReporter] Unknown table 'embedded_address' 18:55:15,281 WARN [JDBCExceptionReporter] SQL Warning: 1051, SQLState: 42S02 18:55:15,281 WARN [JDBCExceptionReporter] Unknown table 'customer' 18:55:15,281 WARN [JDBCExceptionReporter] SQL Warning: 1051, SQLState: 42S02 18:55:15,281 WARN [JDBCExceptionReporter] Unknown table 'embedded_address' 18:55:15,500 WARN [JDBCExceptionReporter] SQL Warning: 1051, SQLState: 42S02 18:55:15,500 WARN [JDBCExceptionReporter] Unknown table 'customer' 18:55:15,500 WARN [JDBCExceptionReporter] SQL Warning: 1051, SQLState: 42S02 18:55:15,500 WARN [JDBCExceptionReporter] Unknown table 'embedded_address' 18:55:15,718 WARN [JDBCExceptionReporter] SQL Warning: 1051, SQLState: 42S02 18:55:15,718 WARN [JDBCExceptionReporter] Unknown table 'customer' 18:55:15,718 WARN [JDBCExceptionReporter] SQL Warning: 1051, SQLState: 42S02 18:55:15,734 WARN [JDBCExceptionReporter] Unknown table 'embedded_address' 18:55:15,734 INFO [SchemaExport] schema export complete 18:55:15,750 INFO [NamingHelper] JNDI InitialContext properties:{java.naming.fa ctory.initial=org.jnp.interfaces.NamingContextFactory, java.naming.factory.url.p kgs=org.jboss.naming:org.jnp.interfaces} 我的联系方式: QQ:495585885 Email:[email protected] 我的博客:http://hi.baidu.com/vsandjava 如果有谁将警告去掉了，麻烦回复一下，我就不再找了. 主页公布的邮箱提供下载 也可到 http://hi.baidu.com/vsandjava/blog/item/3fac221ff2f394c8a686697f.html