使用servlet通過2個表單發送變量

Question

我遇到了2個servlet的問題。基本上我有一個表單的jsp頁面，當我點擊提交時，我需要從這個jps獲取所有變量，以便將它們注入第二個（input type =「hidden」），最後一起提交。

我的servlet 1（添加客戶端）

@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（添加帳戶）

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"); 
    } 
} 

感謝

Answer 1

在servlet的1你應該使用：

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

而不是：

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

因爲與ServletRequest#getRequestDispatcher(java.lang.String)，如果路徑開始於「/」它被解釋爲相對於當前上下文根（即當前請求的上下文路徑）。

• 示例：如果在http://test/myapp/toto接收到一個請求，將上轉發http://test/myapp/toto/BankAdvisor/AddAccount

而用ServletContext#getRequestDispatcher(java.lang.String)路徑被解釋爲相對於當前上下文根（即當前Web應用程序的上下文路徑）。

• 例如：如果您在http://test/myapp/toto收到請求時，它會在http://test/myapp/BankAdvisor/AddAccount轉發如果Web應用程序上下文根是http://test/myapp