JDBC入门之一--连接Mysql实验

 1 import java.sql.*;
 2 
 3 public class MysqlConnection {
 4     public static void main(String args[]){
 5                 //1）加载mysql驱动器
 6         try {
 7             Class.forName("com.mysql.jdbc.Driver");
 8             System.out.println("Success loading driver!");
 9         } catch (Exception e) {
10             // TODO: handle exception
11             System.out.print("Error loading driver!");
12             e.printStackTrace();
13         }
14         //2）建立与mysql连接
15                 //getConnection的三个参数，url：只能连接协议，连接主机，和端口号，以及要连接的数据库；user：连接到数据库中的用户名；password：连接密码
16         try {
17             Connection connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/world","root","538769");
18             System.out.println("connect to world!");
19                         //3）通过connection，创建statement
20             Statement stm = connection.createStatement();
21             //4）resultset中存放查询之后的结果
22             ResultSet rSet = stm.executeQuery("select * from city");
23             //ResultSet中的next方法是判断下一个是否为空
24             while(rSet.next()){
25                 System.out.println("the City " + rSet.getString("ID")+" is " + rSet.getString("Name"));
26                 //System.out.println(rSet.getString("ID","Name"));
27             
28             }
29             
30         } catch (Exception e) {
31             // TODO: handle exception
32             System.out.println("error get data!");
33             e.printStackTrace();
34         }
35         
36     }
37 }