Configuration problem - Mailing list pgsql-novice

Hi all,

I have a problem to connect to my database localy from jdbc,
in postgresql.conf i allow tcp/ip connection,
in pg_hba.conf i have the following lines :
local  all                                                trust
host   all    all        127.0.0.1    255.255.255.255     trust

i don't get where i am wrong in my configuration

Thanks for help

regards

Alexandre