我一直收到此错误（错误404：SRVE0190E：找不到文件：）

Question

我试图创建一个简单的Websphere项目，但始终出现错误。我不确定我要去哪里。我已经用谷歌搜索了类似的问题，但我似乎没有一个适合我，因为我不断遇到同样的错误。

我试图以各种方式解决该问题，并添加了一个丢失的web.xml文件，但它似乎仍然无法正常工作，而且我不确定我要去哪里。

/**
 * Servlet implementation class RegisterServlet
 */
@WebServlet("/RegisterServlet")
public class RegisterServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;

    /**
     * @see HttpServlet#HttpServlet()
     */
    public RegisterServlet() {
        super();
        // TODO Auto-generated constructor stub
    }

    /**
     * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
        //response.getWriter().append("Served at: ").append(request.getContextPath());
        response.setContentType("text/html");
        PrintWriter out = response.getWriter();


        String FNAME = request.getParameter("FNAME");
        String LNAME = request.getParameter("LNAME");
        String MSISDN = request.getParameter("MSISDN");
        String AMB = request.getParameter("AMB");
        Connection connection = null;


        try {

            connection =DriverManager.getConnection("jdbc:mysql://localhost/ussd","root","root1215"); 
            PreparedStatement ps = connection.prepareStatement("INSERT INTO USERDETAILS (FNAME, LNAME, MSISDN, AMB) VALUES (?, ?, ?, ?)");
            ps.setString(1, FNAME);
            ps.setString(2, LNAME);
            ps.setString(3, MSISDN);
            ps.setString(4, AMB);;


            int i = ps.executeUpdate();
            if (i > 0)
                System.out.println("You are successfully registered...");
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }finally {
            if(connection !=null) {
                try {
                    connection.close();
                } catch (SQLException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        }


    }

    /**
     * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
        doGet(request, response);
    }

}

//**************** web.xml code********************


<!DOCTYPE web-app PUBLIC
 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
 "http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app>

  <display-name>Archetype Created Web Application</display-name>

  <servlet>
    <servlet-name>RegisterServlet</servlet-name>
    <display-name>RegisterServlet</display-name>
    <description></description>
    <servlet-class>com.web.servlet.RegisterServlet</servlet-class>
  </servlet>

    <servlet-mapping>
        <servlet-name>RegisterServlet</servlet-name>
        <url-pattern>/RegisterServlet</url-pattern>
    </servlet-mapping>
    <welcome-file-list>
        <welcome-file>index.jsp</welcome-file>
    </welcome-file-list>



</web-app>