They have two purposes. The one you stated, but that's a very minor benefit. It is, in fact, not guaranteed at all; a JDBC driver is free to ... ... <看更多>

this method is called on a closed <code>PreparedStatement</code>. */. void setDate(int parameterIndex, java.sql.Date x). throws SQLException;. ... <看更多>

PreparedStatement 接口方法2. 接口 PreparedStatement 位于 java.sql 包所有超级接口： Statement , Wrapper 所有已知子接口 ... ... <看更多>