使用servlet通过2个表单发送变量

Question

我遇到了两个servlet的问题。基本上我得到了一个jsp页面的表单，当我点击提交，我需要得到所有的变量从这个jps，以便注入到第二个上(输入type=“隐藏”)，为最终提交所有一起。

我的servlet 1(添加客户端)

    @Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
    System.out.println("salut 1  ");
    request.getRequestDispatcher("/JSP/Template/BankAdvisor/AddClient.jsp").forward(request, response);
}

@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {

    String firstname = request.getParameter("firstname");
    String lastname = request.getParameter("lastname");
    String email = request.getParameter("email");
    String address = request.getParameter("address");
    String city = request.getParameter("city");
    String zipcode = request.getParameter("zipcode");
    String phone = request.getParameter("phone");

    if (firstname != null && lastname != null && email != null && address != null && city != null && zipcode != null && phone != null) {

        if (!lastname.isEmpty() && !firstname.isEmpty() && !email.isEmpty() && !address.isEmpty() && !city.isEmpty() && !zipcode.isEmpty() && !phone.isEmpty()) {

            request.setAttribute("firstname", firstname);
            request.setAttribute("lastname", lastname);
            request.setAttribute("email", email);
            request.setAttribute("address", address);
            request.setAttribute("city", city);
            request.setAttribute("zipcode", zipcode);
            request.setAttribute("phone", phone);
            request.getRequestDispatcher("/BankAdvisor/AddAccount").forward(request, response);

        } else {

            response.sendRedirect(getServletContext().getContextPath() + "/BankAdvisor/AddClient");
        }

    } else {

        response.sendRedirect(getServletContext().getContextPath() + "/BankAdvisor/AddClient");
    }

}

我的servlet 2(添加帐户)

    protected void doGet(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
    request.getRequestDispatcher("/JSP/Template/BankAdvisor/AddAccount.jsp").forward(request, response);
    String firstname = request.getParameter("firstname");
    String lastname = request.getParameter("lastname");
    String email = request.getParameter("email");
    String address = request.getParameter("address");
    String city = request.getParameter("city");
    String zipcode = request.getParameter("zipcode");
    String phone = request.getParameter("phone");
}

@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {

    String firstname = request.getParameter("firstname");
    String lastname = request.getParameter("lastname");
    String email = request.getParameter("email");
    String address = request.getParameter("address");
    String city = request.getParameter("city");
    String zipcode = request.getParameter("zipcode");
    String phone = request.getParameter("phone");

    //The two news variables
    String accountName = request.getParameter("accountname");
    String accountType = request.getParameter("accounttype");

    if (firstname != null && lastname != null && email != null && address != null && city != null && zipcode != null && phone != null) {

        if (!lastname.isEmpty() && !firstname.isEmpty() && !email.isEmpty() && !address.isEmpty() && !city.isEmpty() && !zipcode.isEmpty() && !phone.isEmpty()) {

         // ACTION 
        } else {
            response.sendRedirect(getServletContext().getContextPath() + "/BankAdvisor/AddClient");
        }

   } else {
 response.sendRedirect(getServletContext().getContextPath() + "/BankAdvisor/AddClient");
   }
}

谢谢

Answer 1

在servlet 1中，您应该使用：

getServletContext().getRequestDispatcher("/BankAdvisor/AddAccount").forward(request, response);

而不是：

request.getRequestDispatcher("/BankAdvisor/AddAccount").forward(request, response);

因为对于ServletRequest#getRequestDispatcher(java.lang.String)，如果路径以"/“开头，它将被解释为相对于当前上下文根(即当前请求的上下文路径)。

• 示例:如果您在http://test/myapp/toto上收到请求，它将在http://test/myapp/toto/BankAdvisor/AddAccount

上转发

而对于ServletContext#getRequestDispatcher(java.lang.String)，路径被解释为相对于当前上下文根(即，当前web应用的上下文路径)。

• 示例:如果您在http://test/myapp/toto上收到请求，如果webapp上下文根是http://test/myapp

，则它将在http://test/myapp/BankAdvisor/AddAccount上转发