Postgres Jdbc Driver Upd May 2026

// Store JSON PGobject jsonObj = new PGobject(); jsonObj.setType("json"); jsonObj.setValue("\"key\": \"value\""); pstmt.setObject(1, jsonObj); // Read JSON String jsonStr = rs.getString("data");

jdbc:postgresql://localhost/mydb?ssl=true&sslmode=require¤tSchema=public&connectTimeout=10&ApplicationName=MyJavaApp 4.1 Query Execution // Statement try (Statement stmt = conn.createStatement(); ResultSet rs = stmt.executeQuery("SELECT id, name FROM users")) while (rs.next()) int id = rs.getInt("id"); String name = rs.getString("name"); postgres jdbc driver

<dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-dbcp2</artifactId> <version>2.11.0</version> </dependency> BasicDataSource ds = new BasicDataSource(); ds.setUrl("jdbc:postgresql://localhost/mydb"); ds.setUsername("user"); ds.setPassword("pass"); ds.setMaxTotal(20); ds.setMaxIdle(10); 6. SSL/TLS Configuration 6.1 Simple SSL (Require) jdbc:postgresql://localhost/mydb?ssl=true&sslmode=require 6.2 Certificate Validation (verify-full) Properties props = new Properties(); props.setProperty("user", "myuser"); props.setProperty("password", "mypass"); props.setProperty("ssl", "true"); props.setProperty("sslmode", "verify-full"); props.setProperty("sslrootcert", "/path/to/ca-cert.pem"); props.setProperty("sslcert", "/path/to/client-cert.pem"); props.setProperty("sslkey", "/path/to/client-key.pem"); 6.3 Disable SSL (Not recommended) jdbc:postgresql://localhost/mydb?ssl=false 7. Advanced Features 7.1 LISTEN/NOTIFY try (Statement stmt = conn.createStatement()) stmt.execute("LISTEN mychannel"); // Wait for notifications (blocking) while (true) Statement stmt2 = conn.createStatement(); ResultSet rs = stmt2.executeQuery("SELECT 1"); rs.close(); org.postgresql.PGNotification[] notifications = ((org.postgresql.PGConnection) conn).getNotifications(); if (notifications != null) for (PGNotification note : notifications) System.out.println(note.getName() + ": " + note.getParameter()); Thread.sleep(1000); // Store JSON PGobject jsonObj = new PGobject(); jsonObj

https://jdbc.postgresql.org/documentation/head/ Essential Connection Parameters | Parameter | Description |

// Use dataSource.getConnection() everywhere try (Connection conn = dataSource.getConnection()) // your code

Properties props = new Properties(); props.setProperty("user", "myuser"); props.setProperty("password", "mypass"); props.setProperty("ssl", "true"); props.setProperty("connectTimeout", "10"); Connection conn = DriverManager.getConnection(url, props); 3. Essential Connection Parameters | Parameter | Description | Example | |-----------|-------------|---------| | ssl | Enable SSL/TLS | true | | sslmode | SSL mode: disable, allow, prefer, require, verify-ca, verify-full | require | | currentSchema | Set default schema | public,myapp | | connectTimeout | Socket connect timeout (seconds) | 30 | | socketTimeout | Socket read timeout (seconds) | 60 | | tcpKeepAlive | Enable TCP keepalive | true | | loginTimeout | Max time for connection (seconds) | 20 | | ApplicationName | Identify app in pg_stat_activity | MyApp | | prepareThreshold | Number of executes before switching to server-prepared | 5 | | preparedStatementCacheQueries | Max cached queries per connection | 256 |

// PreparedStatement (preferred) String sql = "SELECT * FROM users WHERE age > ? AND city = ?"; try (PreparedStatement pstmt = conn.prepareStatement(sql)) pstmt.setInt(1, 18); pstmt.setString(2, "Paris"); ResultSet rs = pstmt.executeQuery();