远程连接oracle问题“The Network Adapter could not...............

com.borland.dx.dataset.DataSetException: Io 异常: The Network Adapter could not establish the connection at com.borland.dx.dataset.DataSetException.a(Unknown Source) at com.borland.dx.dataset.DataSetException.throwException(Unknown Source) at com.borland.dx.dataset.DataSetException.SQLException(Unknown Source) at com.borland.dx.sql.dataset.Database.openConnection(Unknown Source) at com.borland.jdbcx.metadata.DatabaseInfo.openConnection(Unknown Source) at com.borland.jdbcx.metadata.e.run(Unknown Source) Chained exception: java.sql.SQLException: Io 异常: The Network Adapter could not establish the connection at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java) at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java) at oracle.jdbc.driver.OracleConnection.<init>(OracleConnection.java) at oracle.jdbc.driver.OracleDriver.getConnectionInstance(OracleDriver.java) at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java) at java.sql.DriverManager.getConnection(DriverManager.java:517) at java.sql.DriverManager.getConnection(DriverManager.java:177) at com.borland.dx.sql.dataset.Database.openConnection(Unknown Source) at com.borland.jdbcx.metadata.DatabaseInfo.openConnection(Unknown Source) at com.borland.jdbcx.metadata.e.run(Unknown Source)