list转换json

<pre name="code" class="html"></**把一个list转换称json格式**/>JSONArray array = new JSONArray();JSONObject object;for (int i = 0; i < list.size(); i++) {object = new JSONObject();try {object.put("goodsId", infos.get(i).getGoodsId());object.put("cartId", infos.get(i).getCartId());object.put("num", "0");array.put(object);} catch (JSONException e) {// TODO Auto-generated catch blocke.printStackTrace();}}String json=array.toString();