SQLite JDBC 3.30.1（最新）不支持java.time

Question

SQLite JDBC 3.30.1（最新）不支持java.time。例如，

创建表Foo（id TEXT，time1 NUMERIC，time2 NUMERIC）;

PreparedStatement stmt = connection.prepareStatement("insert into Foo(id, time1, time2) values (1, ?, ?)");
stmt.setParameter(1, LocalDate.now());
stmt.setParameter(2, LocalTime.now());
stmt.executeUpdate();

成功。现在尝试检索该行：

PreparedStatement stmt = connection.prepareStatement("select id, time1, time2 from Foo");
ResultSet resultSet = stmt.executeQuery();

resultSet.getObject(2, java.time.LocalDate.class)
resultSet.getObject(2, java.time.LocalTime.class)

投掷

java.sql.SQLFeatureNotSupportedException

有人面临同样的问题并有解决方案吗？

Answer 1

令人惊讶的是，resultSet.getObject(2, java.time.LocalDate.class)确实确实抛出了SQLFeatureNotSupportedException。但是，您可以使用.getString检索String表示形式，然后使用.parse进行后续转换：

stmt = conn.prepareStatement("select id, time1, time2 from Foo");
ResultSet resultSet = stmt.executeQuery();

String ldString = resultSet.getString(2);
LocalDate ld = LocalDate.parse(ldString);
String ltString = resultSet.getString(3);
LocalTime lt = LocalTime.parse(ltString);

System.out.println(ld);  // 2020-03-22
System.out.println(lt);  // 15:53:49.284