问题： org.postgresql.util.PsqlException: Connection refused. Check that the hostname and port are correct and that the postmaster is accepting TCP/IP connections. 解决办法：Edit /var/lib/pgsql/data/postgresql.conf file Change #listen_addresses = 'localhost' to listen_addresses = '*' 问题： org.postgresql.util.PsqlException: FATAL: no pg_hba.conf entry for host "<host_ip>",user "fkong",database "fkong",SSL off 解决办法： Edit /var/lib/pgsql/data/pg_hba.conf file Add below line under "# IPv4 local connections:" "host all all <host_ip>/32 password" 问题： org.postgresql.util.PsqlException: FATAL: Ident authentication Failed for user "fkong" 解决办法： Edit /var/lib/pgsql/data/pg_hba.conf file Change "host all all <host_ip>/32 ident" to "host all all <host_ip>/32 password"