Postgresql Java Driver -

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).

jdbc:postgresql://host:port/database?parameter1=value1¶meter2=value2 postgresql java driver

When fetching millions of rows, avoid OutOfMemoryError by streaming. Working with JSONB PGobject jsonObject = new PGobject();

HikariConfig config = new HikariConfig(); config.setJdbcUrl("jdbc:postgresql://localhost:5432/mydb"); config.setUsername("postgres"); config.setPassword("secret"); config.setMaximumPoolSize(10); config.setConnectionTimeout(30000); try (HikariDataSource dataSource = new HikariDataSource(config); Connection conn = dataSource.getConnection()) // Use connection jdbc:postgresql://host:port/database

PostgreSQL supports asynchronous messaging. The JDBC driver can listen for notifications.

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.

try (Statement stmt = conn.createStatement()) stmt.execute("LISTEN my_channel"); // Wait for notifications while (true) PGNotification[] notifications = conn.unwrap(PGConnection.class).getNotifications(1000); if (notifications != null) for (PGNotification notification : notifications) System.out.println("Received: " + notification.getParameter());