数据库用户直接连接pdb

假设需要连接的pdb数据库名字就是pdb:
[oracle@localhost] cd /u01/app/oracle/product/12.2.0/db_home/network/admin
[oracle@localhost admin]$ vi tnsnames.ora

PDB =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = pdb)
    )
  )

[oracle@localhost admin]$ lsnrctl restart
[oracle@localhost admin]$ sqlplus soe/admin@pdb