mysql数据库修改添加Date格式列的方法

import java.sql.*;
import java.text.DateFormat;
//数据库的查询
public class SelectTable {

    String dbDriver="com.mysql.jdbc.Driver";
     String dbUrl="jdbc:mysql://localhost:3306/sss";//根据实际情况变化
     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);//注意是三个参数
       }
       catch (SQLException e)
       {
         e.printStackTrace();
       }
       return conn;
     } 

public void select(){
Connection conn = getConn();
try{
 Statement stmt = conn.createStatement(); //创建Statement对象
        System.out.println("成功连接到数据库！");
        String sql = "select * from jdbc";  //要执行的SQL
        ResultSet rs = stmt.executeQuery(sql);//创建数据对象

        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("成功连接到数据库！");
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");//将YYYY-MM-DD格式的时间转换为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();
}

}