mysql jdbc封装

try (Connection conn = DriverManager.getConnection(url, username, password);
     Statement stmt = conn.createStatement();
     ResultSet rs = stmt.executeQuery(sql)) {
    // 处理结果集
} catch (SQLException e) {
    e.printStackTrace();
}

String sql = "SELECT * FROM users WHERE username = ? AND password = ?";
try (Connection conn = DriverManager.getConnection(url, username, password);
     PreparedStatement pstmt = conn.prepareStatement(sql)) {
    pstmt.setString(1, username);
    pstmt.setString(2, password);
    try (ResultSet rs = pstmt.executeQuery()) {
        // 处理结果集
    }
} catch (SQLException e) {
    e.printStackTrace();
}

# HikariCP配置示例
spring.datasource.hikari.maximum-pool-size=20
spring.datasource.hikari.minimum-idle=5
spring.datasource.hikari.idle-timeout=30000
spring.datasource.hikari.connection-timeout=2000
spring.datasource.hikari.max-lifetime=1800000