Json 数组作为对 android 客户端的响应

Question

我有一个要求，其中 json 数组响应应该如下所示

[{"rank":231,"title":"The Night of the Hunter"},{"rank":232,"title":"Pirates of the Caribbean: The Curse of the Black Pearl"},{"rank":233,"title":"Lagaan: Once Upon a Time in India"},{"rank":234,"title":"Castle in the Sky"}]

它由 android 客户端收到的响应进行了相应的解析，但我无法生成正确的响应结构。

我现在非常感谢你的帮助

@WebServlet("/JsonHost")
public class JsonHost extends HttpServlet {
    private static final long serialVersionUID = 1L;

    int rank;
    int title;

    protected void doGet(HttpServletRequest request,
            HttpServletResponse response) throws ServletException, IOException {

        PrintWriter out = response.getWriter();
        // get request parameters for userID and password

        String[] movie = {
                "The Shawshank Redemption",
                "The Godfather",
                "The Godfather: Part II",
                "The Dark Knight",
                "Pulp Fiction",
                "Schindler's List",
                "12 Angry Men"..............};


int offset=0;
    int limit=20;

        if (request.getParameter("offset") != null)
            offset = Integer.parseInt(request.getParameter("offset"));
        System.out.println("offset value:" + offset);


        JSONArray mJSONArray = new JSONArray(Arrays.asList(movie));

    //  System.out.println(gn.toJson(mJSONArray));

        //out.println(gn.toJson(mJSONArray));

        String m[][] = new String[20][20];

        for (int rank = 0; rank < offset + limit && rank < movie.length; rank++){
                for (int title = 0; title < offset+limit; title++) {

                    m[rank][title] = movie[title];



                //  System.out.println(m[rank][title]);
                    out.println(gn.toJson(m[rank][title]));
                }

            }


        }

    protected void doPost(HttpServletRequest request,
            HttpServletResponse response) throws ServletException, IOException {

        doGet(request, response);
    }

}

Answer 1

要使用 Gson，您可以这样做：

像这样为您的电影创建 class：

public class Movie {

           private int rank;
    private String name;

    public Movie(int rank, String name) {
        this.rank = rank;
        this.name = name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getName() {
        return name;
    }

    public void setRank(int rank) {
        this.rank = rank;
    }

    public int getRank() {
        return rank;
    }
}

有一个电影列表，例如：

List<Movie> movies = new ArrayList<Movie>();

将一些电影添加到您的列表中：

movies.add(new Movie(1,"The Shawshank Redemption"));
movies.add(new Movie(2,"The Godfather"));

将您的列表转换为 Json：

Gson gson = new Gson();

String movieJsonList = gson.toJson(movies);

您可以看到字符串 movieJsonList 将是：

[{"rank":1,"name":"The Shawshank Redemption"},{"rank":2,"name":"The Godfather"}]

Answer 2

这是您的task.I 希望对您有所帮助！

JSONArray array=new JSONArray();
    int index=0;
    for(int i=231;i<235;i++){
        JSONObject jsonObject=new JSONObject();
        jsonObject.put("rank", i);
        jsonObject.put("title", movie[index++]);
        array.put(jsonObject);
    }

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