servlet..
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType(CONTENT_TYPE);
String id="1";

request.setAttribute(id,"id");
PrintWriter out = response.getWriter();
out.println("<html>");
out.println("<head><title>NewsServlet</title></head>");
out.println("<body bgcolor=\"#ffffff\">");
out.println("<input type='hidden' name='id' value='"+id+"'>");
out.println("<script>window.navigate('maupdatehealthNews.jsp')</script>");
out.println("</body>");
out.println("</html>");
out.close();
}
maupdatehealthNews.jsp<html>
<body>
<%
 String id=(String)request.getAttribute("id");
 out.print(id);
%>
</body>
</html>为什么得不到servlet的id 值啊

解决方案 »

  1.   

    servlet..
    public void doGet(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
    response.setContentType(CONTENT_TYPE);
    String id="1";

    request.setAttribute(id,"id");//这句错了吧 应该是request.setAttribute("id",id);
    PrintWriter out = response.getWriter();
    out.println("<html>");
    out.println("<head><title>NewsServlet</title></head>");
    out.println("<body bgcolor=\"#ffffff\">");
    out.println("<input type='hidden' name='id' value='"+id+"'>");
    out.println("<script>window.navigate('maupdatehealthNews.jsp')</script>");
      

  2.   

    servlet..
    public void doGet(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
    response.setContentType(CONTENT_TYPE);
    String id="1";

    request.setAttribute(id,"id");
    PrintWriter out = response.getWriter();
    out.println("<html>");
    out.println("<head><title>NewsServlet</title></head>");
    out.println("<body bgcolor=\"#ffffff\">");
    out.println("<input type='hidden' name='id' value='"+id+"'>");
    out.println("<script>window.navigate('maupdatehealthNews.jsp')</script>");   //这么跳转好像不行
    out.println("</body>");
    out.println("</html>");
    out.close();
    }       RequestDispatcher view=request.getRequestDispatch("'maupdatehealthNews.jsp");
            view.forward(request,response);//把请求响应对象带入到jsp中
      

  3.   

    servlet..
    public void doGet(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
    response.setContentType(CONTENT_TYPE);
    String id="1";

    request.setAttribute(id,"id");
          RequestDispatcher view=request.getRequestDispatch("'maupdatehealthNews.jsp");
            view.forward(request,response);//把请求响应对象带入到jsp中这样就行了,不要用servlet写html。
      

  4.   

    out.println("<script>window.navigate('maupdatehealthNews.jsp')</script>");   这句不对,应类似下面的语句跳转:
    RequestDispatcher rd = this.getServletContext().getRequestDispatcher("/csvmgmt/csvup.jsp?selected=" + result.substring(0, result.indexOf("!")) + "&pageId=1&result=" + result.substring(result.indexOf("!") + 1));
    rd.forward(request, response);