sql - Java app: Connect to PostgreSQL database -

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i attempting connect postgres sql database. normally, can connect going link:

test.ischool.testu.edu

where connect phppgadmin entering credentials, , can connect database, testdb, selecting side.

here relevant java code:

    try {         class.forname("org.postgresql.driver");     } catch (classnotfoundexception e1) {         e1.printstacktrace();     }      string url = "jdbc:postgresql://test.ischool.testu.edu:5432/testdb";     string user = "testuser";     string pass = "testpassword";     connection db = null;     try {         db = drivermanager.getconnection(url,user,pass);     } catch (sqlexception e1) {         e1.printstacktrace();     }

i receive following error:

org.postgresql.util.psqlexception: connection refused. check hostname , port             correct , postmaster accepting tcp/ip connections.

i'm pretty sure doing wrong. assuming code correct (which i'm sure not case), connect database, need have .jar file inside remote directory, or can run locally? make difference?

i have connected database using following python code (this code inserted remote directly , run there):

    conn = psycopg2.connect("dbname=testdb user=testuser password=testpassword")

the jdbc url using mysql:

jdbc:mysql://test.ischool.testu.edu:5432/testdb

use 1 postgresql:

jdbc:postgresql://test.ischool.testu.edu:5432/testdb

if changing doesn't please post exact error getting.


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