Java – How to redirect to servlet when we have multiple buttons

htmljavajspservlets

I have 2 textboxes and 3 buttons and each button has specific action i.e. insert, update, delete.
But how to redirect it when specific button click ?
because i have used it in one form tag.

so what will it do when any button click ?
how it will get the action name ?

code :

<form action="Doaction" method="post">

First Name : <input type="text" id="fname" name="fname">
<br> 
Last Name : <input type="text" id="lname" name="lname"><br>


<input type="button" value="Insert">



<input type="button" value="Update">



<input type="button" value="Delete">
</form>

any help please ?

Best Answer

in form : give name to buttons

First Name : <input type="text" id="fname" name="fname">
<br> 
Last Name : <input type="text" id="lname" name="lname"><br>


<input type="button" value="Insert" name="button">



<input type="button" value="Update" name="button">



<input type="button" value="Delete" name="button">
</form>

String button_param = request.getParameter("button");
RequestDispatcher rd = null;

if(button_param .equals("Insert")
{
rd=request.getRequestDispatcher("InsertServlet");
}
else if(button_param .equals("Update"))
{
rd=request.getRequestDispatcher("UpdateServlet");
}
else if(button_param .equals("Delete"))
{
rd=request.getRequestDispatcher("DeleteServlet");
}

rd.forward(request, response);

Related Solutions

C# – How to handle multiple submit buttons in ASP.NET MVC Framework

Here is a mostly clean attribute-based solution to the multiple submit button issue based heavily on the post and comments from Maarten Balliauw.

[AttributeUsage(AttributeTargets.Method, AllowMultiple = false, Inherited = true)]
public class MultipleButtonAttribute : ActionNameSelectorAttribute
{
    public string Name { get; set; }
    public string Argument { get; set; }

    public override bool IsValidName(ControllerContext controllerContext, string actionName, MethodInfo methodInfo)
    {
        var isValidName = false;
        var keyValue = string.Format("{0}:{1}", Name, Argument);
        var value = controllerContext.Controller.ValueProvider.GetValue(keyValue);

        if (value != null)
        {
            controllerContext.Controller.ControllerContext.RouteData.Values[Name] = Argument;
            isValidName = true;
        }

        return isValidName;
    }
}

razor:

<form action="" method="post">
 <input type="submit" value="Save" name="action:Save" />
 <input type="submit" value="Cancel" name="action:Cancel" />
</form>

and controller:

[HttpPost]
[MultipleButton(Name = "action", Argument = "Save")]
public ActionResult Save(MessageModel mm) { ... }

[HttpPost]
[MultipleButton(Name = "action", Argument = "Cancel")]
public ActionResult Cancel(MessageModel mm) { ... }

Update: Razor pages looks to provide the same functionality out of the box. For new development, it may be preferable.

Javascript – How to prevent buttons from submitting forms

You're using an HTML5 button element. Remember the reason is this button has a default behavior of submit, as stated in the W3 specification as seen here: W3C HTML5 Button

So you need to specify its type explicitly:

<button type="button">Button</button>

in order to override the default submit type. I just want to point out the reason why this happens.

Best Answer

Related Solutions

C# – How to handle multiple submit buttons in ASP.NET MVC Framework

Javascript – How to prevent buttons from submitting forms

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