Postgresql Java Driver _verified_ May 2026

String sql = "SELECT id, name FROM users WHERE email = ?"; try (PreparedStatement pstmt = conn.prepareStatement(sql)) pstmt.setString(1, "alice@example.com"); ResultSet rs = pstmt.executeQuery(); while (rs.next()) long id = rs.getLong("id"); String name = rs.getString("name");

Always use try-with-resources to automatically close Connection , PreparedStatement , and ResultSet . 5. Handling PostgreSQL-Specific Data Types The driver maps standard SQL types to Java types, but also supports special PostgreSQL types. Working with JSONB PGobject jsonObject = new PGobject(); jsonObject.setType("jsonb"); jsonObject.setValue("\"key\": \"value\""); pstmt.setObject(1, jsonObject); Working with UUID pstmt.setObject(1, UUID.randomUUID()); Working with Arrays String[] tags = "java", "postgres", "jdbc"; Array sqlArray = conn.createArrayOf("text", tags); pstmt.setArray(1, sqlArray); 6. Connection Pooling: Don’t Open a Connection Per Request Creating a physical database connection for every request is expensive. Use HikariCP (the fastest and most popular pooling library). postgresql java driver

conn.setAutoCommit(false); // Required for streaming PreparedStatement pstmt = conn.prepareStatement("SELECT * FROM large_table"); pstmt.setFetchSize(1000); // Fetch in chunks of 1000 rows try (ResultSet rs = pstmt.executeQuery()) while (rs.next()) processRow(rs); // No memory blow-up String sql = "SELECT id, name FROM users WHERE email =

When building Java applications that require a robust, open-source relational database, PostgreSQL is a top contender. But Java speaks JDBC (Java Database Connectivity), not PostgreSQL’s native wire protocol. That’s where the PostgreSQL JDBC Driver ( pgjdbc ) comes in. Working with JSONB PGobject jsonObject = new PGobject();

This article explores how to effectively use the official driver, covering setup, CRUD operations, connection pooling, and advanced features like LISTEN / NOTIFY and COPY . The PostgreSQL JDBC Driver (Group ID: org.postgresql , Artifact ID: postgresql ) is a Type 4 JDBC driver. This means it’s written purely in Java and connects directly to the database using the PostgreSQL wire protocol—no native libraries or ODBC bridges required.

// Update try (PreparedStatement pstmt = conn.prepareStatement("UPDATE users SET name = ? WHERE id = ?")) pstmt.setString(1, "Alice B."); pstmt.setLong(2, 1); pstmt.executeUpdate();