servlet用forward转不到JSP,帮我看看哪里错了

import java.io.IOException;

import javax.servlet.ServletException;
//ServletToJSP.java
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;


public class ServletToJSP extends HttpServlet {

@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
resp.setContentType("text/html");
req.setAttribute("servletName", "ServletToJSP");
this.getServletContext().getRequestDispatcher("/servlet_jsp/ServeltUseJsp.jsp").forward(req,resp);
//this.getServletConfig().getServletContext().getRequestDispatcher("/servlet_jsp/ServeltUseJsp.jsp").forward(req, resp);
//resp.sendRedirect(req.getContextPath()+"/servlet_jsp/ServletUseJsp.jsp");
}

}

---

出现这种错误
HTTP Status 404 - /my/servlet_jsp/ServeltUseJsp.jsp

--------------------------------------------------------------------------------

type Status report

message /my/servlet_jsp/ServeltUseJsp.jsp

description The requested resource (/my/servlet_jsp/ServeltUseJsp.jsp) is not available.


--------------------------------------------------------------------------------