Here’s a comprehensive and practical guide to the (often referred to as postgresql-42.x.x.jar or org.postgresql.Driver ), structured for developers. PostgreSQL JDBC Driver: The Complete Guide 1. What Is the PostgreSQL JDBC Driver? The PostgreSQL JDBC Driver (officially PgJDBC ) is a Type 4 JDBC driver that allows Java applications to connect to a PostgreSQL database using standard JDBC APIs. It's pure Java (no native libraries required) and supports both old and modern PostgreSQL versions.
// UPDATE try (PreparedStatement ps = conn.prepareStatement( "UPDATE users SET email = ? WHERE id = ?")) ps.setString(1, "new@example.com"); ps.setInt(2, 1); ps.executeUpdate();
try (HikariDataSource ds = new HikariDataSource(config); Connection conn = ds.getConnection()) // use connection
// DELETE try (PreparedStatement ps = conn.prepareStatement( "DELETE FROM users WHERE id = ?")) ps.setInt(1, 1); ps.executeUpdate();
try (Connection conn = DriverManager.getConnection(url, user, password)) System.out.println("Connected to PostgreSQL!"); Statement stmt = conn.createStatement(); ResultSet rs = stmt.executeQuery("SELECT version()"); if (rs.next()) System.out.println(rs.getString(1)); catch (SQLException e) e.printStackTrace();
// READ try (PreparedStatement ps = conn.prepareStatement( "SELECT * FROM users WHERE id = ?")) ps.setInt(1, 1); ResultSet rs = ps.executeQuery(); if (rs.next()) String name = rs.getString("name");
org.postgresql.Driver Maven Central coordinates: org.postgresql:postgresql 2. Adding the Driver to Your Project Maven <dependency> <groupId>org.postgresql</groupId> <artifactId>postgresql</artifactId> <version>42.7.1</version> <!-- Check for latest --> </dependency> Gradle implementation 'org.postgresql:postgresql:42.7.1' Manual (JAR download) Download from jdbc.postgresql.org 3. Basic Connection Example import java.sql.*; public class PostgresExample public static void main(String[] args) String url = "jdbc:postgresql://localhost:5432/mydb"; String user = "postgres"; String password = "secret";
Here’s a comprehensive and practical guide to the (often referred to as postgresql-42.x.x.jar or org.postgresql.Driver ), structured for developers. PostgreSQL JDBC Driver: The Complete Guide 1. What Is the PostgreSQL JDBC Driver? The PostgreSQL JDBC Driver (officially PgJDBC ) is a Type 4 JDBC driver that allows Java applications to connect to a PostgreSQL database using standard JDBC APIs. It's pure Java (no native libraries required) and supports both old and modern PostgreSQL versions.
// UPDATE try (PreparedStatement ps = conn.prepareStatement( "UPDATE users SET email = ? WHERE id = ?")) ps.setString(1, "new@example.com"); ps.setInt(2, 1); ps.executeUpdate();
try (HikariDataSource ds = new HikariDataSource(config); Connection conn = ds.getConnection()) // use connection
// DELETE try (PreparedStatement ps = conn.prepareStatement( "DELETE FROM users WHERE id = ?")) ps.setInt(1, 1); ps.executeUpdate();
try (Connection conn = DriverManager.getConnection(url, user, password)) System.out.println("Connected to PostgreSQL!"); Statement stmt = conn.createStatement(); ResultSet rs = stmt.executeQuery("SELECT version()"); if (rs.next()) System.out.println(rs.getString(1)); catch (SQLException e) e.printStackTrace();
// READ try (PreparedStatement ps = conn.prepareStatement( "SELECT * FROM users WHERE id = ?")) ps.setInt(1, 1); ResultSet rs = ps.executeQuery(); if (rs.next()) String name = rs.getString("name");
org.postgresql.Driver Maven Central coordinates: org.postgresql:postgresql 2. Adding the Driver to Your Project Maven <dependency> <groupId>org.postgresql</groupId> <artifactId>postgresql</artifactId> <version>42.7.1</version> <!-- Check for latest --> </dependency> Gradle implementation 'org.postgresql:postgresql:42.7.1' Manual (JAR download) Download from jdbc.postgresql.org 3. Basic Connection Example import java.sql.*; public class PostgresExample public static void main(String[] args) String url = "jdbc:postgresql://localhost:5432/mydb"; String user = "postgres"; String password = "secret";