JDBC连接数据库演示案例

 import java.sql.Connection;
 import java.sql.DriverManager;
 import java.sql.ResultSet;
 import java.sql.SQLException;
 import java.sql.Statement;

 public class DBUtil {

     private static final String URL="jdbc:mysql://127.0.0.1:3306/student";
     private static final String USER="root";
     private static final String PASSWORD="root";

     public static void main(String[] args) throws ClassNotFoundException, SQLException {

         //1、加载驱动程序
         Class.forName("com.mysql.jdbc.Driver");
         //2、获得数据库的连接
         Connection conn = DriverManager.getConnection(URL, USER, PASSWORD);
         //3、通过数据的连接来操作数据库，实现增删改查
         Statement stmt = conn.createStatement();
         ResultSet rst = stmt.executeQuery("select name,age from stu");
         while(rst.next()){
             System.out.println(rst.getString("name")+","+rst.getInt("age"));
         }

     }

 }