JSP | 基础 | 连接数据库

 package util;

 import java.sql.DriverManager;
 import java.sql.SQLException;

 import com.mysql.jdbc.*;

 public class DBConfgier {

     private static final String driver = "com.mysql.jdbc.Driver";
     //定义连接URL、数据用户及密码
     private static final String dbURL = "jdbc:mysql://localhost:3306/School_info?characterEncoding=utf8&useSSL=true&serverTimezone=UTC";
     private static final String dbUser = "root";
     private static final String dbPassword = "root";

     private static Connection conn = null;

     //载入JDBC驱动程序
     static
     {
         try
         {
             Class.forName("com.mysql.jdbc.Driver");
         } catch(Exception ex) {
             ex.printStackTrace();
         }
     }

     public static Connection getConnnection() throws Exception {
         if(conn == null) {
             conn =  (Connection) DriverManager.getConnection(dbURL, dbUser, dbPassword);
             return conn;
         }
         return conn;
     }

     public static void main(String[] args) throws Exception {
         Connection conn = DBConfgier.getConnnection();
         if(conn != null) {
             System.out.println("连接成功！");
         } else {
             System.out.println("连接失败！");
         }
     }

 }