Getting data from ActionClass to JSP in Struts 2

Question

I'm currently working on a school project which consists of developing a game using Struts2/JSP.

The problem I have is I can't get Data from my ActionClass to my JSP using jQuery. It works great the other way and I found multiple sources to do so.

Here is my minimized GameAction.class:

private String playerColor;
private Map<String,Object> applicationMap;

public String execute (){

playerColor = ((Joueur)applicationMap.get("joueur")).getPlayerColor();
    return SUCCESS;
}

NOTE: everything has a getter/setter.

game.js :

var $playerColor;
$(window).on('load', function () {

$.ajax({
    type : "GET",
    url : "gotoGameAction",
    data : "playerColor=",
    success : function (data) {
    $playerColor = data;
    var html = "<h2>" + $playerColor.toString() + "</h2>";
    $("#playerColor").html(html);
  }

})

});

Struts.xml:

<package name="default" extends="json-default" namespace="/">
    <action name="gotoGameAction" class="actions.logins.GameAction">
        <result name="success" type="json">/WEB-INF/views/game.jsp</result>
    </action>
</package>

This output I have on my JSP is : [object Object].

I really can't get what's going on there.

score 0 · Answer 1 · answered Dec 21 '17 at 10:51

0

I found some of mistakes in your code. It may helpful to you.

In struts.xml

Its

<result name="success" type="json">playerColor</result>

instead

<result name="success" type="json">/WEB-INF/views/game.jsp</result>

Here type json so variable to be passed.

And playerColor should have getter method in GameAction.

In Ajax call simply

success : function (data) {
    $("#playerColor").html("<h2>" + data + "</h2>");
}

answered Dec 21 '17 at 10:51

SatyaTNV

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I already have a getter/setter for playerColor and already have type="json". i've put data instead of playerColor in html but still same issue – Aymane EL Jahrani Dec 21 '17 at 10:57
what about `result` tag in `struts.xml`. @AymaneELJahrani – SatyaTNV Dec 21 '17 at 11:01
I tried to put playerColor instead of my link : it didn't work – Aymane EL Jahrani Dec 21 '17 at 11:04
After all changes application was reloaded or not. – SatyaTNV Dec 21 '17 at 11:05
of course i did reload everything. I'll try to clean everything again and try just to be sure – Aymane EL Jahrani Dec 21 '17 at 11:06
If application was reloaded and even though its not working after changes done means you have some other issue. – SatyaTNV Dec 21 '17 at 11:08
So you are sure from the method? If yes thank you a lot i'll try to find what's wrong – Aymane EL Jahrani Dec 21 '17 at 11:09
I'm sure in that if getter of `playerColor` is `public` and changes had did as above means it should work. try to post getters/setters too. – SatyaTNV Dec 21 '17 at 11:12
I tried everything and still nothing . Actually when i put only sucess on ajax call , i get the page content displayed twice but the data are still not loaded. When i add url :"gotoGameAction" i get the weird "Object Object" displayed – Aymane EL Jahrani Dec 21 '17 at 11:37
Does it action method executed or not just check put some logger or sysout for this and also prompt response `data` in `alert`. – SatyaTNV Dec 21 '17 at 11:39
I ran this in debug mode : when i don't put url : gotoGameAction in ajax call the method execute in GameAction is never called – Aymane EL Jahrani Dec 21 '17 at 12:12

score 0 · Answer 2 · answered Dec 25 '17 at 00:54

You might not understand what is a JSON result type and how the content is provided by the action which is executing this result type.

To get more about plugin and documentation see JSON Plugin.

You can also look in the source code for the class which is being executed the JSONResult. Then you see that

/**
 * This result type doesn't have a default param, null is ok to reduce noise in logs
 */
public static final String DEFAULT_PARAM = null;

_{However such noise sometimes is helpful if you are debugging the code.}

That makes no any sense in your code

<result name="success" type="json">/WEB-INF/views/game.jsp</result>

The you need to dig into the tutorial and examples how to use this result. One of them you can find here.

Another link might help you to decide whether you need a json result or use any other result suitable for JSON response.

Combining all that together will make an idea to rewrite your code to get it working.

None of you have helped me i resolved this mysefl by using $.getJSON instead of a classic get request using $.ajax. However thank you :) — Aymane EL Jahrani, Dec 26 '17 at 12:31
`getJson` is the same like ajax having set properties by default values. — Roman C, Dec 26 '17 at 22:01

Getting data from ActionClass to JSP in Struts 2

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