编写一个简单的jdbc例子程序

 package it.cast.jdbc;
 
 import java.sql.Connection;
 import java.sql.DriverManager;
 import java.sql.ResultSet;
 import java.sql.SQLException;
 import java.sql.Statement;
 
 public class Base {
 
     public static void main(String[] args) throws SQLException {
          test();
     }
 
     static void test() throws SQLException {
         // 1.注册驱动
         DriverManager.registerDriver(new com.mysql.jdbc.Driver());
 
         // 2.建立连接
         Connection conn = DriverManager.getConnection(
                 "jdbc:mysql://localhost:3306/jdbc", "root", "123");
 
         // 3.创建语句
         Statement st = conn.createStatement();
 
         // 4.执行语句
         ResultSet rs = st.executeQuery("select * from user");
 
         // 5.处理结果
         while (rs.next()) {
             System.out.println(rs.getObject(1) + "\t" + rs.getObject(2) + "\t"
                     + rs.getObject(3)+"\t" + rs.getObject(4));
         }
 
         //6.释放资源
         rs.close();
         st.close();
         conn.close();
     }
 
 }

BASE

导入jar ==>mysql-connector-java-5.1.22-bin.jar