在action里不能用request跳转吗?

比如这样

public ActionForward doAdd(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) {
ByForm ByForm = (ByForm) form;
TbBy tbBy=ByForm.getBy();
HttpSession session=request.getSession();
TbAdmin tbAdmin=(TbAdmin)session.getAttribute("admin1");
biz.add(tbBy, tbAdmin);
try {
request.getRequestDispatcher("by.do?o=doList").forward(request, response);
} catch (ServletException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}

每次一执行到跳转的时候就报错

把跳转那句换成

response.sendRedirect("by.do?o=doList");

试试

return mapping.findForward(("by.do?o=doList");

用这个跳转试试~

return后面跟返回路径