Action to accept dynamic json data from user interface

Question

I would like to have an Action class which should accept a JSON string constructed from user interface with no setter and getter in the Action clas

Answer 1

If you want to send JSON object with multiple key-value pair in it and you want to get these key-values in your action class without creating any setters/getters,

In the Action class decleration, we should implement ServletRequestAware and we should override the setServletRequest() method and set the HttpServletRequest attribute

public class YourClass extends ActionSupport implements ServletRequestAware

private HttpServletRequest request;

@Override
public void setServletRequest(HttpServletRequest request) {
    this.request = request;
}

public HttpServletRequest getServletRequest() {
  return this.request;
}

And in our targeted function, we should use above request object to get the parameter (by its name as it is set in the json as the key):

public String fetchData() {
  String key1Data = getServletRequest().getParameter("key1");
   String key2Data = getServletRequest().getParameter("key2"); 
  return SUCCESS;
 }

Where your JSON object should have data something like:

var jsonData = {"key1": "Hello", "key2":"There"};