How should I use try-with-resources with JDBC?

Question

I have a method for getting users from a database with JDBC:

public List getUser(int userId) {
    String sql = \"SELECT id, name FROM users WHER         


        

Answer 1

Here is a concise way using lambdas and JDK 8 Supplier to fit everything in the outer try:

try (Connection con = DriverManager.getConnection(JDBC_URL, prop);
    PreparedStatement stmt = ((Supplier)() -> {
    try {
        PreparedStatement s = con.prepareStatement("SELECT userid, name, features FROM users WHERE userid = ?");
        s.setInt(1, userid);
        return s;
    } catch (SQLException e) { throw new RuntimeException(e); }
    }).get();
    ResultSet resultSet = stmt.executeQuery()) {
}