找不到DriverManager，红色下划线并提示我创建类DriverManager

Question

protected void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException
{
    //define the fields
    String username = "root";
    String password = "Otiwah0771";
    String jdbcURL = "jdbc:mysql://localhost:3306/employeedirectory";
    String driver = "com.mysql.jdbc.Driver";

    try
    {

    //Get the Print Writer object
    PrintWriter out = response.getWriter();
    out.println("Connecting to databace"+jdbcURL);

    //load the Driver 
    Class.forName(driver);

    //Get the connection
    Connection connection = DriverManager.getConnection(jdbcURL,username,password);

    //Close the connection
    connection.close();
    }catch(Exception e)
    {
        e.printStackTrace();
    }
}

**使用Netbeans 11.2 **

我已添加mysql连接器jar，但问题仍然存在（找不到DriverManager符号）

Answer 1

问题是jdbc-api-1.4.jar不属于库，因此无法导入java.sql.Driver.class。从jdbc api下载jdbc-api-1.4.jar-将其添加到库中，就可以使用