The mysql database modifies the method for adding Date format columns

import java.sql.*;
import java.text.DateFormat;
// Database query 
public class SelectTable {

    String dbDriver="com.mysql.jdbc.Driver";  
     String dbUrl="jdbc:mysql://localhost:3306/sss";// According to the actual situation  
     String username="root"; 
     String password="123"; 
     public Connection getConn() 
     { 
       Connection conn=null; 
       try 
       { 
         Class.forName(dbDriver); 
       } 
       catch (ClassNotFoundException e) 
       { 
         e.printStackTrace(); 
       } 
       try 
       { 
         conn = DriverManager.getConnection(dbUrl,username,password);// Pay attention to is 3 A parameter  
       } 
       catch (SQLException e) 
       { 
         e.printStackTrace(); 
       } 
       return conn; 
     } 
 
public void select(){
Connection conn = getConn();
try{
 Statement stmt = conn.createStatement(); // create Statement object 
        System.out.println(" Successfully connected to the database! ");
        String sql = "select * from jdbc";  // To perform the SQL
        ResultSet rs = stmt.executeQuery(sql);// Creating data objects 


        System.out.println("id"+"\t"+"name"+"\t"+"brithday");
        while (rs.next()){          
        System.out.print(rs.getInt(1) + "\t");
          System.out.print(rs.getString(2) + "\t");
          System.out.print(rs.getDate(3) + "\t");
          System.out.println();
        }
}catch(Exception e){
e.printStackTrace();
}
        
      
      } 
public void insert(){
Connection conn = getConn();
try{
Statement stmt = conn.createStatement();
System.out.println(" Successfully connected to the database! ");
String sql = "insert into jdbc (id,name,birthday) values(?,?,?)";
PreparedStatement pst =conn.prepareStatement(sql);
DateFormat df = DateFormat.getDateInstance();
 
java.util.Date dd = df.parse("2000-12-12");// will YYYY-MM-DD Format the time to convert to date
long t = dd.getTime();
java.sql.Date date = new java.sql.Date(t);
 

pst.setInt(1, 5);
pst.setString(2, "limazhi");
pst.setDate(3, date);
pst.executeUpdate();
select();
}catch(Exception e){
e.printStackTrace();
}
 
}
public static void main(String args[]){
SelectTable st = new SelectTable();
st.insert();
}
     
}