编写一个简单的jdbc例子程序

 1 package it.cast.jdbc;
 2 
 3 import java.sql.Connection;
 4 import java.sql.DriverManager;
 5 import java.sql.ResultSet;
 6 import java.sql.SQLException;
 7 import java.sql.Statement;
 8 
 9 public class Base {
10 
11     public static void main(String[] args) throws SQLException {
12          test();
13     }
14 
15     static void test() throws SQLException {
16         // 1.注册驱动
17         DriverManager.registerDriver(new com.mysql.jdbc.Driver());
18 
19         // 2.建立连接
20         Connection conn = DriverManager.getConnection(
21                 "jdbc:mysql://localhost:3306/jdbc", "root", "123");
22 
23         // 3.创建语句
24         Statement st = conn.createStatement();
25 
26         // 4.执行语句
27         ResultSet rs = st.executeQuery("select * from user");
28 
29         // 5.处理结果
30         while (rs.next()) {
31             System.out.println(rs.getObject(1) + "\t" + rs.getObject(2) + "\t"
32                     + rs.getObject(3)+"\t" + rs.getObject(4));
33         }
34         
35         //6.释放资源
36         rs.close();
37         st.close();
38         conn.close();
39     }
40 
41 }