How do I sort JSONObjects in an JSONArray in Java (Server side)?

Question

@GET
  @Produces("application/json")
  @Consumes("application/json")
  @Path("/getStuff/{id}")
  public String getStuff(
      @PathParam("id") String id,
      @Context HttpServletRequest request,
      @Context HttpServletResponse response) throws Exception
  {
      Collection<Stuff> stuff = Manager.getStuff().values();
      JSONArray jArray = new JSONArray();    
      for (Stuff i : stuff)
      {          
        jsnObjct.put("id", i.getId());
        jsnObjct.put("name", i.getName());
        jArray.add(jsnObjct);
      }
      json = jArray.toString();
      response.setContentType("text/javascript");
      response.getOutputStream().print(json);
      response.flushBuffer();  
      return null;
  }

Why don't you sort your Java objects before you put them in a JSON array? And I think your loop should be for (Stuff i : stuff) — Paul
– Paul, Commented Dec 7, 2011 at 3:33
@James, he can sort by whatever he wants. He can sort his Collection<Stuff> before he iterates over it. He can break apart each Stuff into a TreeMap where key=getId() and val=getName(), for example, then iterate over the TreeMap and build his JSON array. He could extend the JSONObject class and make it comparable. — Paul
– Paul, Commented Dec 7, 2011 at 3:41
@Paul, I agree. I'm just trying to get him/her to provide more information, so we don't have to list all those possibilities. — James Clark
– James Clark, Commented Dec 7, 2011 at 4:53
@JamesClark, oops, sorry, I thought you were asking me (even though you didn't reference me). Didn't mean to jump in on your quiz! :) — Paul
– Paul, Commented Dec 7, 2011 at 4:57

Dainank · Accepted Answer · 2024-04-17 11:09:12Z

3

For net.sf.json library:

Object[] myArray = jArray.toArray();
myArray = Arrays.sort(myArray);
JSONArray sortedJArray = new JSONArray();
for (Object obj : myArray) {
  sortedJArray.add(obj);
}

edited Apr 17, 2024 at 11:09

Dainank

2,6132 gold badges9 silver badges22 bronze badges

answered Dec 7, 2011 at 3:30

Shaun

2,47619 silver badges33 bronze badges

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1 Comment

Paul Over a year ago

Json-lib (the library you mentioned) makes it easy to work with collections and arrays (examples): JSONArray jsonArray = JSONArray.fromObject( "['json','is','easy']" );

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