使用java连接数据库 - 驱动程序错误[重复]

Posted 2023-05-07

【中文标题】使用java连接数据库 - 驱动程序错误[重复]

【英文标题】：Connecting databases with java - driver Error [duplicate]

【发布时间】：2013-05-08 06:33:14

【问题描述】：

我正在尝试连接我正在制作的关于我在 MS Access 中创建的大学数据库的 Java 程序。

我的代码是这样的：

    package Uni;
    import java.util.*;
    import java.sql.*;

    public class College 
        static final String database_URL = "H:/CSCI 213/Labs/Lab 11 - 12/src/Uni/Uni.accdb";
        static Scanner input = new Scanner(System.in);
        static Scanner in = new Scanner(System.in);

        @SuppressWarnings("unused")
        public static void main(String[] args) 
            Connection connection = null;
            Statement statement = null;
            ResultSet resultset = null;
            String name;
            int age;
            int id;
            String choice = "y";

            while(choice.equalsIgnoreCase("y")) 
        System.out.println("What Would you like to do");
        System.out.println("1- Insert");
        System.out.println("2- Update");
        System.out.println("3- Search");
        System.out.println("4- Delete");
        System.out.println("5- Exit");

        int x = input.nextInt();
        try 
                    connection = DriverManager.getConnection(database_URL);
                    //connection.commit();
                    //statement = connection.createStatement();
                    switch(x) 
                      case 1:   
                        System.out.println("Enter the name:");
                        name = input.nextLine();
                        System.out.println("Enter the Age:");
                        age = input.nextInt();
                        //statement.executeQuery("INSERT INTO Database VALUES ('"+name+"','"+age+"')");
                        Statement sta1 = connection.createStatement(); 
                        sta1.executeQuery("INSERT INTO Database VALUES ('"+name+"','"+age+"')");
                        sta1.close();
                        System.out.println("Your ID is: ");
                        //statement.executeQuery("select ID from Database where Name='"+name+"';");
                        Statement sta2 = connection.createStatement();
                        sta2.executeQuery("select ID from Database where Name='"+name+"';");
                        connection.commit();
                        sta2.close();
                        break;

                        case 2:
                        System.out.println("Enter the id of the person you'd like to update:");
                        id = input.nextInt();
                        System.out.println("Enter the name:");
                        name = input.nextLine();
                        System.out.println("Enter the Age:");
                        age = input.nextInt();
                        //statement.executeUpdate("UPDATE Database SET Age="+age+", Name='"+name+"' WHERE ID="+id+";");
                        Statement sta3 = connection.createStatement();
                        sta3.executeQuery("UPDATE Database SET Age="+age+", Name='"+name+"' WHERE ID="+id+";");
                        connection.commit();
                        sta3.close();
                        break;

                    case 3:
                        System.out.println("Enter the Name of the person you'd like to search for:");
                        name = input.nextLine();
                        //statement.executeQuery("select Name, Age from Database where Name='"+name+"';");
                        Statement sta4 = connection.createStatement();
                        sta4.executeQuery("select Name, Age from Database where Name='"+name+"';");
                        connection.commit();
                        sta4.close();
                        break;

                    case 4:
                        System.out.println("Enter the id of the person you'd like to delete:");
                        id = input.nextInt();
                        //statement.execute("DELETE FROM Database where ID='"+id+"';");
                        Statement sta5 = connection.createStatement();
                        sta5.executeQuery("DELETE FROM Database where ID='"+id+"';");
                        connection.commit();
                        sta5.close();
                        break;

                    case 5:
                        System.out.println("Terminating");
                        System.exit(0);

                    default:
                        System.out.println("Wrong Entry");
                    

                

           catch (SQLException e)  
               System.out.println("SQLException: "+e.getMessage());
           


           System.out.println("Would you like to try again ? (enter y for yes)");
           choice = in.nextLine();
           
     
   

现在确切的输出如下

你想做什么 1-插入 2-更新 3- 搜索 4-删除 5- 退出 1 SQLException: 未找到适用于 H:/CSCI 213/Labs/Lab 11 - 12/src/Uni/Uni.accdb 的驱动程序 你想再试一次吗？ （输入 y 表示是）

任何关于如何解决这个问题的想法都非常感谢

【参考方案1】：

H:/CSCI 213/Labs/Lab 11 - 12/src/Uni/Uni.accdb 是文件路径，不是有效的 JDBC URL。

您需要为特定数据库获取 JDBC 驱动程序 JAR 文件，在运行程序时将其放入类路径中，并使用正确的 JDBC URL。 JDBC URL 的确切外观取决于您使用的数据库和驱动程序（查看文档）。

有关通过 JDBC 使用 Microsoft Access 数据库，请参阅例如：How to connect Java to MS Access 或搜索“Microsoft Access JDBC 驱动程序”。

有关详细信息，请参阅 Oracle 的 JDBC Getting Started tutorial。