How to send JSON back with JAVA?

Question

I am having problems using Gzip compression and JQuery together. It seems that it may be caused by the way I am sending JSON responses in my Struts Actions. I use the next code

Answer 1

response.getWriter().write(json.toString());

change to: response.getWriter().print(json.toString());

Answer 2

In our project we are doing pretty much the same except that we use application/json as the content type.

Wikipedia says that the official Internet media type for JSON is application/json.

Answer 3

Personally, I think using JAX-RS is the best way to deal with data binding, be that XML or JSON. Jersey is a good JAX-RS implementation (RestEasy is good too), and has good support. That way you can use real objects, no need to use Json.org libs proprietary classes.

Answer 4

Instead of

try {
       response.getWriter().write(json.toString());
} catch (IOException e) {
       throw new ApplicationException("IOException in populateWithJSON", e);
}        

try this

try {
        json.write(response.getWriter());
} catch (IOException e) {
        throw new ApplicationException("IOException in populateWithJSON", e);
}                                      

because this will avoid creating a string and the JSONObject will directly write the bytes to the Writer object