Pdf struts action

So rather than doing this:. This is an Action that includes the context-relative URI specified by the parameter property of our associated ActionMapping. This shorter form uses the include attribute:. Therefore, if we have code in our JSP that looks like this:. This is a standard Action that switches to a new module and then forwards control to a URI within the new module. Valid request parameters for this Action are:. Say we have a web application that uses Struts.

Struts has two modules: the default module and an admin module , both shown below:. The config init parameter defines the default module. Perform the following steps:. This forward passes two request parameters. The page parameter specifies the module relative action. The second parameter specifies the prefix of the module. The listUser. This is an abstract Action that dispatches to a public method that is named by the request parameter whose name is specified by the parameter property of the corresponding ActionMapping.

This Action is useful for developers who prefer to combine many similar actions into a single Action class , in order to simplify their application design. To configure the use of this action in our struts-config. For example, we might have the following three methods in the same action:. We could just use a hidden field that we inspect to delegate to member methods inside of our action.

The DispatchAction uses a hidden request parameter to determine which method to invoke. Thus, subclasses of the DispatchAction have many methods with the same signature of the execute method. The name of the hidden request parameter specifies the name of the method to invoke.

We specify the name of the hidden parameter by using the parameter attribute of the action element. Rather than having a single execute method, we have a method for each logical action. The DispatchAction dispatches to one of the logical actions represented by the methods. It picks a method to invoke based on an incoming request parameter.

The value of the incoming request parameter is the name of the method that the DispatchAction will invoke. All of the other mapping characteristics of this action must be shared by the various handlers. This places some constraints over what types of handlers may reasonably be packaged into the same DispatchAction subclass.

If the value of the request parameter is empty , a method named unspecified is called. The default action is to throw an exception.

If the request was cancelled, the custom handler cancelled , will be used instead. Here is an example that groups multiple actions into one action. The parameter attribute specifies the name of the request parameter that is inspected by the DispatchAction. Pass the action a request parameter that refers to the method we want to invoke. The userRegistrationPage1. This implementation sends a hidden field parameter instead that specifies which method to invoke.

This is useful in cases where an HTML form has multiple submit buttons with the same name. The button name is specified by the parameter property of the corresponding ActionMapping. For example, we might have the following ApplicationResources.

An example of such implementations are:. If no corresponding key is found then an exception will be thrown. We can override the method unspecified to provide a custom handler. If the submit was cancelled, the custom handler cancelled will be used instead. For this example, we use the registration form to use the LookupDispatchAction. We will add two buttons. One button will be labeled Save ; this button will save the user to the system.

The second button will be called Remove to use the LookupDispatchAction, perform the following steps:. This has a similar meaning to the DispatchAction. Essentially, this means the LookupDispatchAction inspects the label of the button called action.

Add a comment. Active Oldest Votes. Found solution to this. Thanks for all who attempted to answer this question. Improve this answer. IMO this isn't a great solution, although it works. S2 provides a mechanism for this, the stream result, that should be preferred to doing everything manually in Java code. DaveNewton : S2's resultType stream always looks for java. InputStream object to be filled in code. Inputstream can be filled when you are reading a PDF file from a file system or any other input-system.

Whereas iText creates a PDF writes it directly to response's outputstream. That being the case, we dont need any inputstream and also iText need any inputstream to write. So this solutions sounds good to me :- — Arun. It's a one-liner to get an input stream from an output stream. Configuration is more flexible via XML, and normalized against the rest of the system.

I'm not arguing to never write directly to the response, but when you don't need to, it seems a waste. PDFGenerator class : import java. ByteArrayOutputStream; import com. ViewPDFAction class : import java. ByteArrayOutputStream; import java. OutputStream; import javax. HttpServletResponse; import org. ServletResponseAware; import com. PDFGenerator; import com. Updated answer for PDF generation. Sign up or log in Sign up using Google.

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