Connect to PostgreSQL via JDBC driver

 
Here is an example to show you how to connect to PostgreSQL database with JDBC driver.
 
** UPDATE: Complete JDBC tutorial now available here.
 
1. Download PostgreSQL JDBC Driver
 
Get PostgreSQL JDBC driver here – 
 
2. Java JDBC connection example
 
Code snippets to use JDBC to connect a PostgreSQL database
 

Class.forName("org.postgresql.Driver");
Connection connection = null;
connection = DriverManager.getConnection(
   "jdbc:postgresql://hostname:port/dbname","username", "password");
connection.close();

 
See a complete example below:
File:PostgreSqlJDBC.java
 

package com.simplecode.jdbc;

import java.sql.DriverManager;
import java.sql.Connection;
import java.sql.SQLException;

public class PostgreSqlJDBC {

private static final String DB_DRIVER = "org.postgresql.Driver";
private static final String DB_CONNECTION="jdbc:postgresql://127.0.0.1:5432/simplecodedb";
private static final String DB_USER = "username";
private static final String DB_PASSWORD = "password";

public static void main(String[] argc) {

	System.out.println("***** PostgreSQL JDBC Connection Testing *****");

	try
	{
	Class.forName(DB_DRIVER);
	}
	catch (ClassNotFoundException e)
	{
	System.err.println("Please add PostgreSQL JDBC Driver in your Classpath ");
        System.err.println(e.getMessage());
	return;
	}

	System.out.println("PostgreSQL JDBC Driver Registered!");

	Connection connection = null;

	try
	{
	connection = DriverManager.getConnection(DB_CONNECTION, DB_USER, DB_PASSWORD);
	}
	catch (SQLException e)
	{
	System.err.println("Connection Failed, Check console");
        System.err.println(e.getMessage());
	return;
	}

	if (connection == null)
	{
	System.out.println("Connection Failed !");
	}
	else
	{
	System.out.println("Connection established!");
	}
}
}