要将 ArrayList 转换为 Json，只需从以下位置下载 Open Source json 实用程序:http://json.org/java/ 或来自 这里

To convert ArrayList to Json, just download Open Source json utility from: http://json.org/java/ or Jar file from here

然后就去做:

JSONArray jsonAraay = new JSONArray(your_array_list);

就这样

注意:你应该在你的 POJO/MODEL 类中有 setter/getter 来将 arraylist 转换为 json

Note: You should have setter/getter in your POJO/MODEL class to convert arraylist to json