Connection conn = JdbcUtil.getConnection();String sql = "insert into user(name,password,email,birthday)             values('abc','123','abc@sina.com','1978-08-08')";PreparedStatement st = conn.            prepareStatement(sql,Statement.RETURN_GENERATED_KEYS );//此参数仅对insert操作有效。st.executeUpdate();ResultSet rs = st.getGeneratedKeys();  //得到插入行的主键if(rs.next())    System.out.println(rs.getObject(1));