CODEWITHSUNDEEP
javajsonajaxjspstruts2
s.surya Prakash
s.surya Prakash

Reputation: 37

JSON Response from Struts 2 not working with AJAX

I'm Using Ajax to get success response from Struts 2 but it ended up giving the response to error function and parse error for parsing JSON in Ajax.

Below is my code.

Action class - PropertyTesting.java

import java.io.IOException;
import org.apache.struts2.ServletActionContext;
import org.json.simple.JSONObject;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;

public class PropertyTesting extends ActionSupport 
{
    public String execute() 
    {
        JSONObject obj  = new JSONObject();
        obj.put("Name", "PersonName");
        obj.put("ID", "PersonID");
        try {
            ServletActionContext.getResponse().getWriter().write(obj.toJSONString());
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return SUCCESS;
    }
}

JSP Page - PropertyTesting.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
    <%@ taglib uri="/struts-tags" prefix="s"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Property Testing</title>
</head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.6.0/jquery.min.js"></script>
<script type="text/javascript">
function invokeAjax()
{
    $.ajax(
    {
        type:"POST",
        url:"PropertyTesting",
        dataType:"json", 
        success: function(responseText)
        {
            console.log(responseText);  
        },
        error: function(errorResponse)
        {
            console.log(errorResponse);
        }
    });
}
    
</script>
</head>
<body>
    <button type="button" onclick="invokeAjax()" >Submit</button>
</body>
</html>

Struts.xml

<struts>
   <constant name="struts.devMode" value="true"/>
   <package name="WebTesting" extends="json-default">
        <action name="PropertyTesting" class="org.testing.PropertyTesting" >
            <result type="json"></result>
        </action>
   </package>
</struts>

And also if I'm doing the same thing using Servlets it's giving me the exact results on using Struts only giving this kind of problems.

Upvotes: 0

Views: 446

Answers (2)

Alf
Alf

Reputation: 1

Since the corresponding get() and set() methods are added to the Service layer injection in the action, the returned JSON object will return the get method as a property of the entity class, so delete the service get() method.

Upvotes: 0

Roman C
Roman C

Reputation: 1

JSONObject is kind of problem when you return a JSON result. By default it serializes the action. Since you don't have properties to serialize you should create ones.

Actions in Struts2 are not singletons, so you should not fear to create properties.

public class PropertyTesting extends ActionSupport 
{

    Map obj;

    public Map getJSON(){
       return obj;
    }

    public String execute() 
    {
        obj  = new HashMap();
        obj.put("Name", "PersonName");
        obj.put("ID", "PersonID");
   
        return SUCCESS;
    }
}

Upvotes: 1

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