在Java中解析为Json Formate时出现类型不匹配错误

Question

Hello EveryOne ! I have a List object that i need to parse into Json type using gson1.1 jar but its is giving type mismatch error ..here is my code..

public static List<Product> getCartList() {
    List<Product> cartList = new Vector<Product>(cartMap.keySet().size());
    for(Product p : cartMap.keySet()) {
        cartList.add(p);
    }

     Gson gson = new Gson();
     // convert your list to json
     String jsonCartList = gson.toJson(cartList);
     // print your generated json
     System.out.println("jsonCartList: " + jsonCartList);

     return jsonCartList;

        }

Plz Guys Help me Thanx in advance..

Answer 1

The return type of your method is List<Product> , which is a List of Product objects whereas you're returning jsonCartList , which is a String .

Hence, the TypeMismatch error.

To achieve what you want(to return the JSON ), change the return type of your method. It should now be

public static String getCartList() {