Servlet如何調用多個提交按鈕

Question

我有一個關於我的簡單應用程序的問題我有兩個單獨的.JSP文件讓說register和login.jsp都提交動作，並且這兩個jsp共享相同的servlet讓說usercontrol.servlet如何如果登錄按鈕與共享servlet共享，則可以使用與register.jsp相同的方法調用該操作嗎？

這裏是我的servlet代碼：

if(request.getParameter("register").equals("Register")){ 
      if(request.getParameter("first") == "" || request.getParameter("middle") == "" || request.getParameter("last") == "" || 
        request.getParameter("loginid") == "" || request.getParameter("pass") == "" || request.getParameter("pass2")== ""){ 
       JOptionPane.showMessageDialog(null, "Cannot leave null value from one of the textfields"); 
       response.sendRedirect("AdminPage/Register.jsp"); 

      } 
      //else if(request.getParameter("pass") != request.getParameter("pass2")){ 
       //JOptionPane.showMessageDialog(null, "Password Mismatch, Check you password and retype it correctly"); 
       //response.sendRedirect("AdminPage/Register.jsp"); 
      //} 
      else{ 
       RegisterUser(request, response); 
      } 
    } 

    else if(request.getParameter("login").equals("Login")){ 
     if(request.getParameter("username") == ""){ 
      JOptionPane.showMessageDialog(null, "Username is required"); 
      response.sendRedirect("AdminPage/Login.jsp"); 
     } 
     else if(request.getParameter("password") == ""){ 
      JOptionPane.showMessageDialog(null, "Password is required"); 
      response.sendRedirect("AdminPage/Login.jsp"); 
     } 
     else if(request.getParameter("username") == "" || request.getParameter("password") == ""){ 
      JOptionPane.showMessageDialog(null, "Password/Username is required"); 
      response.sendRedirect("AdminPage/Login.jsp"); 
     } 
     else{ 
      LoginUser(response, request); 
     } 
    } 

我整合我與Hibernate應用程序。

這是我的jsp提交按鈕我沒有包含整個表單，我只是包含提交按鈕。

的Login.jsp

<input type="submit" name="login" value="Login" /> 

Register.jsp

<input type="submit" name="register" value="Register"/> 

我的問題是，每次我運行它總是在if..else語句的所有操作的應用程序是否有任何其他方式解決這個問題？

Answer 1

在你的JSP，你應該有提交按鈕

爲login.jsp的

<input type="submit" name="login" value="Login"/> 

爲register.jsp

<input type="submit" name="register" value="Register"/> 

現在的servlet可以檢查像

if(request.getParameter("login") != null) { 
    // request is comming from login jsp 
    // do validation, perform actual transaction 
} else if(request.getParameter("register") != null) { 
    // request is comming from register jsp 
    // do validation, perform actual transaction 
}