Exporting scheduled jobs in Oracle
Assuming that we are talking about dbms_scheduler jobs (rather than, say, jobs scheduled using the dbms_job package), you can use the dbms_metadata package to generate the DDL. Specifically, the dbms_metadata.get_ddl function.  Something like

SELECT dbms_metadata.get_ddl( 'PROCOBJ', &lt;&lt;job name&gt;&gt;, &lt;&lt;schema&gt;&gt; )
  FROM dual


should work, for example.

Here is a list of the object types that dbms_metadata.get_ddl supports.

Here is an example of using the PROCOBJ trick to get dbms_metadata to script out a job.