java.sql.SQLException:Column Index out of range,0<1

public static void main(String[] args) {        Connection conn = null;        ResultSet rs = null;        try {            Class.forName("com.mysql.jdbc.Driver");            String url = "jdbc:mysql://localhost:3306/demo";            String user = "root";            String password = "root";            conn = DriverManager.getConnection(url,user,password);            rs = conn.createStatement().executeQuery("select * from emp");            //获得列数            int len = rs.getMetaData().getColumnCount();            System.out.println(len);            while(rs.next()){//遍历行                //遍历列                for(int i=0; i<len; i++){                    System.out.print(rs.getString(i));                    if(i<len){                        System.out.print(", ");                    }                }                System.out.println();//换行            }        } catch (ClassNotFoundException | SQLException e) {                     e.printStackTrace();                    }finally{                try {                    if(rs!=null) rs.close();                    if(conn!=null) conn.close();                } catch (SQLException e) {                                      e.printStackTrace();                }        }                                                       }

由于rs.next()遍历查询结果时，下标是从“1”开始，而这里循环打印是从“0”开始，导致出错
修改方法：