connecting java to Mysql using Mysql-connector/j

Question

I use netbeans 6.9 IDE and its features to connect my java class to Mysql database. as you know, Mysql-connector driver is embedded in netbeans. I make new connection to Mysql database using Mysql(connector/j) driver, and every thing is okay, it displays all databases in Mysql and all tables in these databases, but when I create my java class to test the connetion and start manipulation, ClassNotFoundException is thrown when I call Class.forName("com.mysql.jdbc.Driver").newInstance(); ie. there is no driver ? why i got that exception ? the same happened when I connect to derby embedded db? can you help? here my test class

public static void main(String[] args) {
        Connection con = null;
        try {
            Class.forName("com.mysql.jdbc.Driver").newInstance();
            System.out.println("driver true");
            con = DriverManager.getConnection("jdbc:mysql:///test",
                    "root", "123456");
            if (!con.isClosed()) {
                System.out.println("Successfully connected to "
                        + "MySQL server using TCP/IP...");
            }
        } catch (Exception e) {
            e.printStackTrace();
            System.err.println("Exception: " + e.getMessage());
        } finally {
            try {
                if (con != null) {
                    con.close();
                }
            } catch (SQLException e) {
            }
        }
    }

Answer 1

您必须将mysql连接器.jar文件（库+添加库+ Mysql JDBC驱动程序）添加到项目中。

Answer 2

在左侧，右键单击“ 库 ”->“ 添加库... ”-选择->“ MySQL JDBC驱动程序 ”，然后重建项目。

Answer 3

您需要将MySQL Connector / J库添加到项目的类路径中，否则Java将无法找到驱动程序类文件。

Answer 4

The answer is with your question. Driver is with your netbeans IDE and not with your java project. Add the required dirver (Jar file) to the project and run.