從Servlet調用JSP頁面

Question

誰能告訴我是否存在除RequestDispatcher之外的其他方法來從我的servlet調用jsp頁面？ 因為我嘗試了很多但沒有成功。

我的servlet正常工作，並從jsp中撤回了所有數據。 當用戶正確輸入用戶名和密碼時，我所需要的只是重定向到另一個頁面。

我的代碼：

首先我的servlet“登錄”

protected void processRequest(HttpServletRequest request,HttpServletResponse response)
        throws ServletException, IOException {
    response.setContentType("text/html;charset=UTF-8");
    PrintWriter out = response.getWriter();

}


  protected void doGet(HttpServletRequest request, HttpServletResponse      response)
        throws ServletException, IOException {
    processRequest(request, response);
}


    protected void doPost(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
    try {
        String user = request.getParameter("username");
        String pass = request.getParameter("password");         
      System.out.println(" le user est "+user+ " le mot de passe est " + pass);

          String query = "SELECT * FROM users WHERE username = '"+user+"' and password='"+pass+"'";

      dbconn = new DBAccess();
      Connection conn = dbconn.connect();

         stmt = conn.createStatement();
         ResultSet res = stmt.executeQuery(query);

            if(res.next()){
              ServletContext sc = this.getServletContext();
              RequestDispatcher rd =sc.getRequestDispatcher( "inscreption.jsp");
              rd.forward(request, response);   
                 System.out.println(" il existe");

            }else { 
           ServletContext sc = this.getServletContext();
            RequestDispatcher rd = sc.getRequestDispatcher("index.jsp");
             //   RequestDispatcher rd =request.getRequestDispatcher("index.jsp");
                rd.forward(request, response);   
                System.out.println("not found");


      }
    } catch (SQLException ex) {
        Logger.getLogger(login.class.getName()).log(Level.SEVERE, null, ex);
    }


    finally{
        System.out.close();
    }





    }}
    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
      */
   /* @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>

我的jsp，我將被重定向到

<html>
<head>
    <!--local jquery-->
    <script  src="jQuerys/jquery-1.9.1.min.js"></script>
    <script  src="jQuerys/jquery.mobile-1.3.1.min.js"></script>
    <link rel ="stylesheet" type="text/css" href="css/jqueryMobile-1.3.1.css"/>
    <!--/local jquery-->
      </head>

      <body>
<div data-role="page" id="inscription">
<div data-role="header" data-theme="b">
    <center>CERIST</center>
</div>
                  <form id="insc" method="post" action="login">

  <div data-role="content">
    <div data-role="fieldcontain">
        <label for="identifiant">Identifiant </label>
        <input type="text" id="identifiant"/>
    </div>
    <div data-role="fieldcontain">
        <label for="password1">Mot de passe </label>
        <input type="password" id="password1"/>
    </div>
    <div data-role="fieldcontain">
        <label for="password2">Confirmation</label>
        <input type="password" id="password2"/>
    </div>
    <div data-role="fieldcontain">
        <fieldset data-role="controlgroup">
            <legend>Vous &ecirc;tes :</legend>
                <input type="radio" name="profil" id="radio-choice-1" value="Candidat" />
                <label for="radio-choice-1">Utilisateur</label>

                <input type="radio" name="profil" id="radio-choice-2" value="Entreprise"  />
                <label for="radio-choice-2">Administrateur</label>
        </fieldset>
    </div>
    <br/>
    <a href="#" data-role="button" onclick="">S'inscrire</a>

        </form>

  </div>
 </div>
      </body>
</html>

Answer 1

index.jsp：

<form action="Myservlet" method="post"><br>
            User name`<`input type="text" name="username"`>`<br>
            Password `<`input type="password" name="password"><br>
            `<`input type="submit" value="Submit" `>`

</form>

Myservlet.java：

protected void processRequest(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
    response.setContentType("text/html;charset=UTF-8");
    PrintWriter out = response.getWriter();
    out.print("Oppos!!!");

}

@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
    processRequest(request, response);
}

@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
    String user = request.getParameter("username");
    String pass = request.getParameter("password");
    RequestDispatcher rd;
    if (user.equals("username") && pass.equals("password")) {
        rd = request.getRequestDispatcher("/inscreption.jsp");
        rd.forward(request, response);
    } else {
        rd = request.getRequestDispatcher("/wrong.jsp");
        rd.forward(request, response);

    }
}

您可以在要調度請求的地方創建兩個以上的頁面，因此在這里，我創建了兩個以上的jsp頁面名稱： right.jsp和wrong.jsp 。 如果用戶名和密碼正確，則將用戶名轉到正確的right.jsp頁面，如果該用戶名和密碼錯誤，則將請求轉到wrong.jsp頁面。

從Servlet調用JSP頁面

問題描述

1 個解決方案

解決方案1
-1 2015-05-27 08:30:57

index.jsp：

Myservlet.java：

從Servlet調用JSP頁面

問題描述

1 個解決方案

解決方案1 -1 2015-05-27 08:30:57

index.jsp：

Myservlet.java：

解決方案1
-1 2015-05-27 08:30:57