How to connect to heroku postgress database from JDBC? - postgresql

Question

I use this code
But can anyone suggest me or guide me to a right document which can give me an example of how to connect to heroku postgress database with JDBC ?
URI dbUri = new URI(System.getenv("DATABASE_URL"));
String dbUrl = "jdbc:postgresql://" + dbUri.getHost() +
dbUri.getPath();
connectionPool = new BasicDataSource();
if (dbUri.getUserInfo() != null) {
connectionPool.setUsername(dbUri.getUserInfo().split(":")[0]);
connectionPool.setPassword(dbUri.getUserInfo().split(":")[1]);
}
connectionPool.setDriverClassName("org.postgresql.Driver");
connectionPool.setUrl(dbUrl);
connectionPool.setInitialSize(1);
Connection connection = connectionPool.getConnection();

Answer 1

See heroku's documentation
Note:
The DATABASE_URL for the Heroku Postgres add-on follows the below convention
postgres://<username>:<password>#<host>:<port>/<dbname>
However the Postgres JDBC driver uses the following convention:
jdbc:postgresql://<host>:<port>/<dbname>?user=<username>&password=<password>
Sample code to parse DATABASE_URL into Jdbc format:
private static Connection getConnection() throws URISyntaxException, SQLException {
URI dbUri = new URI(System.getenv("DATABASE_URL"));
String username = dbUri.getUserInfo().split(":")[0];
String password = dbUri.getUserInfo().split(":")[1];
String dbUrl = "jdbc:postgresql://" + dbUri.getHost() + ':' + dbUri.getPort() + dbUri.getPath();
return DriverManager.getConnection(dbUrl, username, password);
}