Question

I am passing the following JSON object from a .jsp page to a java servlet using JSON.stringify and JQuery.ajax():

{"bin":[{"binId":"0","binDetails":[{"productCode":"AU192","qty":"4"},{"productCode":"NE823","qty":"8"}],"comments":"store pickup"},{"binId":"1","binDetails":[{"productCode":"AF634","qty":"2"}],"comments":""},{"binId":"2","binDetails":[{"productCode":"QB187","qty":"3"}],"comments":"international shipping"},{"binId":"3","binDetails":[{"productCode":"AF634","qty":"2"},{"productCode":"QB187","qty":"2"}],"comments":""}]}

This is the code in my java servlet:

StringBuffer strBuffer = new StringBuffer();
String line = null;

try {
   BufferedReader reader = request.getReader();
   while((line = reader.readLine()) != null){
      strBuffer.append(line);
   }
} catch (Exception e) {
}

try {
   JSONObject jsonObj = new JSONObject(new JSONTokener(strBuffer.toString()));
   // I call a method here and pass jsonObj
} catch (Exception e) {
}

In the method to which I pass jsonObj I am using jsonObj.length() to find out how many items are in jsonObj and it tells me 1, which in this case I would have expected 3. I even tried this:

JSONObject bins = jsonObj.get("bin");
bins.length();

which told me jsonObj.get(“bin”) was not a JSONObject. Is my data formatted incorrectly before I pass it from my .jsp or am I using the JSONObject in my java servlet incorrectly? How do I access the values in the JSONObject?

Answer 1

JSONArray bins = jsonObj.getJSONArray("bin");
bins.length();