Question

I’m using JSon-RPC library.

Servlet:

I want to put List<Student> into JSonArray that is the same as {["name":"AAA","age":"24"]["name":"BBB","age":"12"]}.
JsonArray have a contructor that accepts a Collection being the same as parameter.
If result is a JsonObject then I’ll response to client with method out.print(instanceJsonObject.toString()).
Now I don’t know how to response JsonArray from Server to Client.

ArrayList<Student> list = new ArrayList<Student>();
list.add(new Student("Vu Duc Hoan", "C1010G", "24"));
list.add(new Student("Vu Duc Hoan2", "C1010G2", "242"));

JSONObject js = new JSONObject();
org.json.JSONArray array = new JSONArray(list);

Client:

Can you tell me how to get data in JsonArray? I’m using $.getJson

btnJson.click(function(){
    $.getJSON("../DemoAjax/Controller?action=getJson",function(data){
});

Answer 1

I think this is the servlet code you are looking for, but I think you would need to first convert the Student object to the JSONObject and then put the JSONObjects in JSONArray, this tutorial might help you:

JSONObject js = new JSONObject();
org.json.JSONArray jsonArray = new JSONArray(list);

// set the response content-type
response.setContentType("application/json");

PrintWriter out = response.getwriter();

// writing the json-array to the output stream
out.print(jsonArray);
out.flush();

In the javascript method the data in function(data) would contain this json-array and you can use this answer to get the data in your html page.