流行错误-apache netbeans 11.2中的org.sqlite.JDBC [重复]

Question

我知道这是一个非常常见的问题，但我搜索了很多但无法解决我的问题。

public static Connection connectDB(){
    try{
        Class.forName("org.sqlite.JDBC");
        Connection conn;
        conn = (Connection) DriverManager.getConnection("jdbc:sqlite:E:\\JAVA GUI\\Library\\library.sqlite");
        return conn;
    }
    catch(Exception e){
        JOptionPane.showMessageDialog(null,e);
        return null;
    }
}

显示错误

ClassNotFoundException org.sqlite.JDBC

我还在 Apache Netbeans 中安装并设置了一个 JDBC 连接器驱动程序，但仍然是徒劳的。我从最近两天开始尝试这个，但是????。 我该如何解决这个问题？ 提前谢谢...

Answer 1

对于这个问题我建议使用这个类并测试，如果你有一个输出数据你的连接是好的，但它没有显示任何东西验证你的驱动程序

对于 Sqlite

package net.sqlitetutorial;

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

/**
 *
 * @author sqlitetutorial.net
 */
public class Connect {
     /**
     * Connect to a sample database
     */
    public static void connect() {
        Connection conn = null;
        try {
            // db parameters
            String url = "jdbc:sqlite:C:/sqlite/db/chinook.db";
            // create a connection to the database
            conn = DriverManager.getConnection(url);

            System.out.println("Connection to SQLite has been established.");

        } catch (SQLException e) {
            System.out.println(e.getMessage());
        } finally {
            try {
                if (conn != null) {
                    conn.close();
                }
            } catch (SQLException ex) {
                System.out.println(ex.getMessage());
            }
        }
    }
    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        connect();
    }
}

文章：https://www.sqlitetutorial.net/sqlite-java/sqlite-jdbc-driver/

对于甲骨文

importjava.sql.*; 
importjava.util.*; 
class Main 
{ 
    public static void main(String a[]) 
    { 
        //Creating the connection 
        String url = "jdbc:oracle:thin:@localhost:1521:xe"; 
        String user = "system"; 
        String pass = "12345"; 

        //Entering the data 
        Scanner k = new Scanner(System.in); 
        System.out.println("enter name"); 
        String name = k.next(); 
        System.out.println("enter roll no"); 
        int roll = k.nextInt(); 
        System.out.println("enter class"); 
        String cls =  k.next(); 

        //Inserting data using SQL query 
        String sql = "insert into student1 values('"+name+"',"+roll+",'"+cls+"')"; 
        Connection con=null; 
        try
        { 
            DriverManager.registerDriver(new oracle.jdbc.OracleDriver()); 

            //Reference to connection interface 
            con = DriverManager.getConnection(url,user,pass); 

            Statement st = con.createStatement(); 
            int m = st.executeUpdate(sql); 
            if (m == 1) 
                System.out.println("inserted successfully : "+sql); 
            else
                System.out.println("insertion failed"); 
            con.close(); 
        } 
        catch(Exception ex) 
        { 
            System.err.println(ex); 
        } 
    } 
} 

查看本教程：https://www.geeksforgeeks.org/establishing-jdbc-connection-in-java/