Though, the way you handled import I think you could tweak that slightly for CREATE. Or you're just compiling datasets in a folder and this way you can group them at once.ĬREATE TABLE from import would be really convenient, but it needs a more complex UI, so we've decided to focus on importing into existing tables for nowĪgreed, this might be a bit of an undertaking as you would likely have to come up with a nice interface for picking data types as well as potential automated guessing. Sure, like you mentioned the use case is sometimes CSVs are too big to work or for whatever reason split up into multiple files but retain the same structure (all have headers, all have the same columns). That way at least some of the work is done if not all.Ĭould you explain your use case for selecting multiple CSV files for import? Do you have data split up into multiple files? Or do you want to import data for multiple tables at once? If (conn1 != null & !conn1.isClosed()) That's how to connect a Java program to PostgreSQL database.Column name matching is something we want to add and we've already experimented with, but we're not sure yet how to handle the case when only some column names match.Ī potential solution that might work, is after you've found matching columns is to loop through the remaining columns that don't. String dbUR元 = "jdbc:postgresql://localhost:5432/ProductDB3" Ĭonn3 = DriverManager.getConnection(dbUR元, parameters) String dbURL2 = "jdbc:postgresql://localhost/ProductDB2" Ĭonn2 = DriverManager.getConnection(dbURL2, user, pass) String dbURL1 = "jdbc:postgresql:ProductDB1?user=root&password=secret" Ĭonn1 = DriverManager.getConnection(dbURL1) create three connections to three different databases on localhost * This program demonstrates how to make database connection to PostgreSQL Java Code Example to connect to PostgreSQL databaseFollowing is a demo program which illustrates three different ways to make connections to a PostgreSQL server: package Properties parameters = new Properties() Ĭonnection conn = DriverManager.getConnection(dbURL, parameters) 4. For example: String dbURL = "jdbc:postgresql://localhost:5432/ProductDB" For example: String dbURL = "jdbc:postgresql://localhost/ProductDB" Ĭonnection conn = DriverManager.getConnection(dbURL, user, pass) - Version #3: getConnection(String url, Properties parameters). For example: String dbURL = "jdbc:postgresql:ProductDB?user=root&password=secret" Ĭonnection conn = DriverManager.getConnection(dbURL) - Version #2: getConnection(String url, String user, String pass). We can choose one in three versions of this method: The JDBC driver manager can detect and load the appropriate driver when it is parsing the database URL.To establish a connection, call the method getConnection() of the DriverManager class and supply database URL and connection parameters. Register JDBC driver for PostgreSQL Server and create connectionWith JDBC 3.0 (JDK 5.0 and before) we need to register the driver as follows: Class.forName("") Or: DriverManager.registerDriver(new ()) However, since JDBC 4.0 (JDK 6.0 and later), the registration is not required. See all connection parameters specific to PosgreSQL.ģ. Jdbc:postgresql:ProductDB&user=root&password=secret Specify user name and password for the connection: Using host name and port number explicitly: Connect to a remote PostgreSQL server on the host dbserver: Connect to the database ProductDB on localhost: Most common parameters are user and password.
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