获取新插入数据的ID

获取新插入数据的ID

  private void insertQus(String question, String choose, String answer,
                String type) {

           Connection conn= null;
           PreparedStatement ps= null;
            try {
                conn=JdbcUtils. getConnection();
                String sql= "insert into questions(question,moption,answer,qusstyle) VALUES(?,?,?,?)";
                ps=conn.prepareStatement(sql,Statement. RETURN_GENERATED_KEYS);
                 //在上条语句中添加Statement.RETURN_GENERATED_KEYS参数。
                ps.setString(1, question);
                ps.setString(2, choose);
                ps.setString(3, answer);
                ps.setString(4, type);
                ps.executeUpdate();
                 //获取Key，ID
                ResultSet rs=ps.getGeneratedKeys();
            rs.next();
            int num=rs.getInt(1);
            System. out.println( "自动增长列为:" +num);

           } catch (SQLException e) {
                e.printStackTrace();
           } finally {
                JdbcUtils. close(ps, conn);
           }
     }