How do you output a view file as an ajax response in Java?

问题

I am a PHP developer but am transitioning to Java. (very new to Java at this point)

Is there a way to make an ajax call to a Servlet, and respond with the output of a separate .jsp file (as opposed to html or json created directly in the Servlet)?

Here is an example of what is common practice w/ Zend Framework, which is what I would like to do with Java if possible:

public function myAjaxCallAction(){
    $this->view->someVar = 'whatever';
    $this->view->hello = 'world';
    $output = $this->view->render('someViewScript.phtml'); // the above vars are in this view
    echo $output;
}

Again very new to java, any advice pertaining to this type of situation would be much appreciated!

回答1:

Just try to load the .jsp that you want. Normally you will use a JSP fragment (.jspf). If you want to load its contents, you can do something like:

Your page:

... content ...
<div id="container"></div>
... content ...

Javascript of the page above (using jQuery):

$(function(){
    $( "#container" ).load( "pathToYoutJsp/file.jsp", { someVar: "whatever", hello: "world" } );
});

The JSP that will be loaded will look something like:

... content ...
${param.someVar} foo foo foo ${param.hello}
... content ...

回答2:

Yes, If i get your question correctly then what you want to do is a simple AJAX request to a JSP file and get reaponse. Do it as follows:

In client Javascript:

var xmlHttp = new XMLHttpRequest(); 
xmlHttp.open( "GET","ajaxreq.jsp?query=John", false ); 
xmlHttp.send(); 
return xmlHttp.responseText;
//returns the response from server. here it is "Hello John"

In server ajaxreq.jsp :

<% 
..              //import required libraries and other application logic
out.print("Hello "+request.getParameter("query"));
..
%>

Hope this helps.

回答3:

Yes you can, by using request.setAttribute before dispatch and then dispatch to your separate page

request.setAttribute("someVa", "whatever");

RequestDispatcher requestDispatcher; 

requestDispatcher = request.getRequestDispatcher("/thankYou.jsp");

requestDispatcher.forward(request, response);

See the following link redirect jsp from servlet RequestDispatcher

来源：https://stackoverflow.com/questions/11813643/how-do-you-output-a-view-file-as-an-ajax-response-in-java

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