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去文档复制，谁记这个呀

用idea，直接提示你，找个差不多的就是了

hibernate.dialect org.hibernate.dialect.Oracle8iDialect
hibernate.connection.driver_class oracle.jdbc.driver.OracleDriver
hibernate.connection.username system
hibernate.connection.password Oracle4test
hibernate.connection.url jdbc:oracle:thin:@localhost:1520:forj
链接不上数据库，搞不懂。

INFO: HHH000401: using driver [oracle.jdbc.driver.OracleDriver] at URL [jdbc:oracle:thin:@localhost:1520:forj]
十一月 10, 2015 9:17:51 上午 org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure
INFO: HHH000046: Connection properties: {user=system, password=****}
十一月 10, 2015 9:17:52 上午 org.hibernate.engine.jdbc.internal.JdbcServicesImpl configure
WARN: HHH000342: Could not obtain connection to query metadata : Io 异常: Connection refused(DESCRIPTION=(TMP=)(VSNNUM=202375680)(ERR=12505)(ERROR_STACK=(ERROR=(CODE=12505)(EMFI=4))))
十一月 10, 2015 9:17:52 上午 org.hibernate.dialect.Dialect <init>
INFO: HHH000400: Using dialect: org.hibernate.dialect.Oracle8iDialect
十一月 10, 2015 9:17:52 上午 org.hibernate.engine.jdbc.internal.LobCreatorBuilder useContextualLobCreation
INFO: HHH000422: Disabling contextual LOB creation as connection was null
十一月 10, 2015 9:17:52 上午 org.hibernate.engine.transaction.internal.TransactionFactoryInitiator initiateService
INFO: HHH000399: Using default transaction strategy (direct JDBC transactions)
十一月 10, 2015 9:17:52 上午 org.hibernate.hql.internal.ast.ASTQueryTranslatorFactory <init>
INFO: HHH000397: Using ASTQueryTranslatorFactory
十一月 10, 2015 9:17:53 上午 org.hibernate.engine.jdbc.spi.SqlExceptionHelper logExceptions
WARN: SQL Error: 17002, SQLState: null
十一月 10, 2015 9:17:53 上午 org.hibernate.engine.jdbc.spi.SqlExceptionHelper logExceptions
ERROR: Io 异常: Connection refused(DESCRIPTION=(TMP=)(VSNNUM=202375680)(ERR=12505)(ERROR_STACK=(ERROR=(CODE=12505)(EMFI=4))))
org.hibernate.exception.GenericJDBCException: Could not open connection

楼主现在找到方言了吗？