java连接数据库

package example_zzgg;

import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;
import java.util.Date;

import com.mysql.jdbc.Connection;


public class example1 {
      public static void main(String[] args){
       Statement stmt=null;
       ResultSet rs=null;
       java.sql.Connection conn=null;
          try {
           
//注册数据库驱动
            Class.forName("com.mysql.jdbc.Driver");
            
            //通过DriverManager获取数据库链接
            String url="jdbc:mysql://localhost:3306/zg";
            String username="root";
            String password="123456";
            
            conn=DriverManager.getConnection(url,username,password);
            
            //通过该connection获取statement对象
            stmt=conn.createStatement();